HXT300 Series Smart Meter User Manual

HXT300 Series user manual
HXT300 Series
Class 0.2s
Three phase smart meter
user manual
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Revision history
Index
Date
Name
Remarks
1.0
08.10.
2013
Sun
Mingming
First edition
Version 2013, Hexing Electrical Co., Ltd reserves all the rights.
When the file is revised, there is no obligation to notify revised parts.
Hexing Electrical Co., Ltd
Add: SHANGCHENG INDUSTRIAL ZONE, 1418MOGANSHAN RD, HANGZHOU, CHINA
Tel: +86 0571 28029275
Website：http://www.hxgroup.cn/
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HXT300 Series user manual
Introduction
Range of validity
The present user manual applies to the meter specified on the title
page.
Purpose
The user manual contains all the information required for application
of the meters for the intended purpose. This includes:
 Provision of knowledge concerning characteristics, construction
and function of the meter
 Information about possible dangers, their consequences and
measures to prevent any danger
 Details concerning the performance of all work throughout the
service life of the meter
Target group
The contents of this user manual are intended for technically qualified
personnel of energy supply companies responsible for the meter
planning, installation, operation and maintenance of the meter.
Hexing Electrical reserves the right of final interpretation
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HXT300 Series user manual
Table of contents
HXT300 Series..................................................................................................................................1
1 Product discription........................................................................................................................ 8
1.1 General view......................................................................................................................... 8
1.2 View window........................................................................................................................ 8
1.3 Application site..................................................................................................................... 8
1.4 Main feature.......................................................................................................................... 9
1.5 Compliant standards..............................................................................................................9
1.6 Model definition..................................................................................................................11
1.7 Technical specification........................................................................................................12
1.7.1 Voltage................................................................................................................... 12
1.7.2 Current................................................................................................................... 12
1.7.3 Frequency..............................................................................................................12
1.7.4
Power consumption....................................................................................... 12
1.7.5 Measuring accuracy.............................................................................................12
1.7.6 Calendar clock accuracy.....................................................................................12
1.7.7 Display....................................................................................................................12
1.7.8 Impulse constant.................................................................................................. 13
1.7.9 Error test output....................................................................................................13
1.7.10 Communication interface..................................................................................13
1.7.11 Temperature range.............................................................................................13
1.7.12 Dielectric strength.............................................................................................. 13
1.7.13 Electromagnetic compatibility.......................................................................... 13
1.8 Weight and mounting dimension........................................................................................ 14
1.9 Connection Diagram........................................................................................................... 15
1.10 Auxiliary terminal connection.......................................................................................... 16
1.11 Auxiliary terminal explanation......................................................................................... 16
2 Safety............................................................................................................................................ 19
2.1 Safety information.............................................................................................................. 19
2.2 Responsibilities................................................................................................................... 19
2.3 Safety regulations................................................................................................................19
3 Mechanical constructions.......................................................................................................... 21
3.1 Case..................................................................................................................................... 21
3.2 Seal......................................................................................................................................22
3.3 Connections.........................................................................................................................23
4 Function........................................................................................................................................ 24
4.1 Block Schematic Diagram.................................................................................................. 24
4.2 Measuring Unit................................................................................................................... 25
4.2.1 Measurement overview....................................................................................... 25
4.2.2 Signal Conversion and Processing................................................................... 27
4.2.3 Data processing........................................................................................................27
4.2.4 Display and readout of the measured quantities............................................ 28
4.3 Energy Accumulation..........................................................................................................30
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4.3.1 Overview................................................................................................................ 30
4.3.2
Energy Accumulation Method...................................................................... 34
4.3.3 Display and readout of Energy consumption.........................................................35
4.4 Maximum Demand calculate.............................................................................................. 40
4.4.1 Overview................................................................................................................ 40
4.4.2 Demand reset by manual....................................................................................43
4.4.3 Display and Readout of Demand...................................................................... 44
4.5 Real-time clock................................................................................................................... 47
4.5.1 External firmware clock....................................................................................... 47
4.5.2 Microcontroller...................................................................................................... 48
4.5.3 Working Details.....................................................................................................48
4.5.4 Display and readout of real-time clock............................................................. 49
4.6 Tariff....................................................................................................................................50
4.6.1 Tariff judgment...................................................................................................... 50
4.6.2 Tariff table update.................................................................................................51
4.6.3 Attentions of tariff table configuration................................................................53
4.7 LCD Display....................................................................................................................... 54
4.7.1 Introduction............................................................................................................54
4.7.2 Display mode and operate..................................................................................57
4.7.3 Display item and display format.........................................................................58
4.8 Monitoring function............................................................................................................ 66
4.8.1 Power-off monitoring............................................................................................66
4.8.2 Overvoltage and under-voltage monitoring..................................................... 66
4.8.3 Loss of phase monitoring....................................................................................67
4.8.4 Current unbalanced monitoring......................................................................... 68
4.8.5 Loss of current monitoring.................................................................................. 68
4.8.6 By-pass monitoring.............................................................................................. 69
4.8.7 Voltage unbalanced monitoring......................................................................... 69
4.9 Disconnector control...........................................................................................................70
4.9.1 Physical characteristics.......................................................................................70
4.9.1.1 Magnetic latching relay in route one......................................................70
4.9.1.2 Dry-reed Relay.......................................................................................... 71
4.9.2 Control logic.......................................................................................................... 72
4.9.3 Physical status detection.................................................................................... 74
4.9.4 Malfunction judgment and handling.................................................................. 74
4.9.5 Reasons of disconnecting disconnector.......................................................... 75
4.10 Event log........................................................................................................................... 75
4.10.1 Standard events recording............................................................................... 75
4.10.2 Tampering detection event............................................................................... 76
4.10.3 Disconnector control event...............................................................................77
4.10.4 Power grid event................................................................................................ 77
4.10.5 Power grid long time power off events........................................................... 79
4.10.6 High magnetic field event................................................................................. 79
4.10.7 Meter cover open event.................................................................................... 80
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4.10.8 Terminal cover open event............................................................................... 80
4.10.9 Meter programming even................................................................................. 80
4.10.10 Power grid power off event............................................................................ 80
4.10.11 Optical visit event............................................................................................. 81
4.10.12 Under-voltage event..................................................................................... 81
4.10.13 Over-voltage event.......................................................................................... 81
4.10.14 Over-current event...........................................................................................81
4.10.15 By-pass event...................................................................................................82
4.10.16 Failure event analysis..................................................................................... 82
4.11 Load record....................................................................................................................... 82
4.11.1 Load record description.....................................................................................82
4.11.2 Analysis of Failure.............................................................................................. 88
4.12 Data billing........................................................................................................................88
4.12.1 Billing logic.......................................................................................................... 88
4.12.2 Billing object........................................................................................................88
4.13 Optical communication.....................................................................................................97
4.13.1 Physical feature..................................................................................................97
4.13.2 Communication protocol................................................................................... 98
4.13.3 Parameter configuration................................................................................... 99
4.14 RS-485 communication.................................................................................................... 99
4.14.1 Physical feature................................................................................................100
4.14.2 Communication protocol................................................................................. 100
4.14.3 Parameter configuration................................................................................. 101
4.15 RS-232 communication.................................................................................................. 102
4.15.1 Physical feature................................................................................................102
4.15.2 Communication protocol................................................................................. 102
4.15.3 Parameter configuration................................................................................. 103
4.16 GSM/GPRS module........................................................................................................104
4.16.1 General...................................................................................................... 104
4.16.2 Technology Feature................................................................................. 104
4.16.3 Parameter Configuration........................................................................ 106
4.16.4 SIM card installed and replacement process......................................107
4.17 Software Update..............................................................................................................109
4.17.1 The Upgrade Process..................................................................................... 109
4.17.2 Upgrade safety protection measures............................................................110
4.17.3 Upgrade Features and Attention....................................................................111
4.18 Battery............................................................................................................................. 111
4.18.1 Battery voltage test.......................................................................................... 111
4.18.2 Remaining battery power monitor................................................................. 111
4.18.3 Judgment of battery power shortage............................................................ 112
4.18.4 Process of changing battery...........................................................................112
4.18.5 Battery life..........................................................................................................115
4.19 Meter Self-detecting........................................................................................................115
4.19.1 Fault register..................................................................................................... 115
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4.19.2 Alarm register....................................................................................................117
4.19.3 AMI status..........................................................................................................118
5 Install and uninstall................................................................................................................... 119
5.1 Assembly........................................................................................................................... 119
5.2 Wiring................................................................................................................................121
5.3 Wiring Check.................................................................................................................... 123
5.4 Function check.................................................................................................................. 123
6 Service........................................................................................................................................ 125
6.1 Fault Operation................................................................................................................. 125
6.2 Fault Code......................................................................................................................... 125
6.3 Meter Repair..................................................................................................................... 125
7 Maintenance................................................................................................................................. 127
7.1 Wash.................................................................................................................................. 127
7.2 Error and function check...................................................................................................127
8 Scarp Processing...................................................................................................................... 128
9 Attachment：The product conformance statement..........................................................129
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HXT300 Series user manual
1 Product discription
1.1 General view
Diagram.1.1.1 meter overview
1.2 View window
Print the relevant working parameters at the front side of the meter, which can print
different message according to user’s requirements; there are two buttons on the meter
cover, user can inquiry information and manually operate relay and demand reset; one
optical interface, IEC1107 interface type; with steel core to gurantee the reliable of touch;
use HHU to read meter and local maintenance; equip Hexing specified optical
communication port for meter reading..
1.3 Application site
•
Application site for this series meter is very wide, according to different types; it
can cover mostly sites, mainly for:
•
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Power plant
Hight voltage transformer substation
Mesolow transformer substation
Exchange point of transmission line
Big and small industrial user, commercial user See details in chapter 1.6
When application site is for 3P3W power grid, meter only assemble 2
measurement units.
•
Data can display through LCD, can get the data thourgh optical port and remote
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module. Remoted communicate can choose different communication module
according to site application (put inside of terminal cover, use RS232 for
connection), like GPRS module, Zigbee module etc. meter can extent two way
separate RS-485 communication port, to build local network, SCADA system or
use the external expansion module for remote communication.
•
Meter can equip multiple output and input control, use for external equipment
control, output alarming and external tariff control. Meter can equip multipule
impulse input and output testing, use for calculate external energy, detect external
input states, send all kindls of impulse signal.
•
Any application beyond the above definition belong to illegal application
1.4 Main feature
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Pluggable modules
With open protocols: DLMS/COSEM.
Local or remote update
Communication data encryption
With external relay control, control load by parameter configuration and
communication command.
Max 31 harmonic voltage and current measurement
4 quadrant active and reactive energy measurement, support 8 tariffs
Active accuracy: Class 0.2s (IEC62053-22).
Reactive accuracy: Class 2(IEC62053-23).
Wide current accumulation, can assure the measuring precision from start
current to max current.
LCD display
Class II protection grade.
IP51 water and dust protection grade.
Multi events inspection, including operational, power grids, energy stealing etc.
Max 17 channels, 3400K bits to record
Support dependent RS-485 interface.
Display when power grid is off
Use optical port for meter reading when power off
Real time clock
1.5 Compliant standards

IEC62052-11 "Electricity metering equipment (a.c.) – General requirements,
testsand test conditions – Part 11: Metering equipment "
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IEC62053-22 "Electricity metering equipment (a.c.) –Particular requirements
–Part 22:Static meters for active energy(classes 0.2 and 0.5) "
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IEC62053-23 "Electricity metering equipment (a.c.) – Particular requirements
–Part 23: Static meters for reactive energy (classes 2 and 3) "
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IEC62056-21 "Electricity metering – Data exchange for meter reading, tariff
and load control – Part 21:Direct local data exchange"
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IEC62056-42 " Electricity metering – Data exchange for meter reading, tariff
and load control – Part 42:Physical layer services and procedures for
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connection-oriented asynchronous data exchange"
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IEC62056-46 "Electricity metering – Data exchange for meter reading, tariff
and load control – Part 46: Data link layer using HDLC protocol"
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IEC62056-47 "Electricity metering – Data exchange for meter reading, tariff
and load control – Part 47:COSEM transport layer for IP networks"
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IEC62056-53 "Electricity metering – Data exchange for meter reading, tariff
and load control – Part 53:COSEM Application layer"
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IEC62056-61 "Electricity metering – Data exchange for meter reading, tariff
and load control – Part 61:OBIS Object identification system"
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IEC62056-62 "Electricity metering – Data exchange for meter reading, tariff
and load control – Part 62:Interface classes"
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EN50470-1
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EN50470-3
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DIN 43856-1989 "Electricity meters, tariff time switches and ripple control
"Electricity metering equipment (a.c.) —Part 1: General
requirements, tests and test conditions — Metering equipment(class indexes A,
B and C) "
"Electricity metering equipment (a.c.) —Part 3: Particular
requirements —Static meters for active energy (classindexes A, B and C) "
receivers; connection diagrams, terminal marking, circuit diagrams"
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DIN 43857 "Watthour meters in moulded insulation case without instrument
transformers up to 60A rated maximum current"
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1.6 Model definition
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1.7 Technical specification
1.7.1 Voltage
Rated voltage Un:
3×57.7/100V to 240 V/415V Three phase four wire
3×57.7V to 3×415V three phase three wire
Voltage range:
3×46/80V to 3×276 V/478V three phase four wires
3×46V to 3×478V three phase three wire
Starting voltage:
46V
Maximum voltage:
288V Three phase four wires
499V three phase three wire
Auxiliary power supply: 57.7V~240VAC or 63.5V~240VAC/DC
1.7.2 Current
Rated current:
Maximum current:
Starting current:
1A
10 A
1mA mutual-inductor
1.7.3 Frequency
Rated frequency fn:
Frequency range:
50Hz or 60Hz
45 to 55 Hz or 55 to 65Hz
1.7.4 Power consumption
Voltage
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Current
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Active power consumption
Apparent power consumption
< 2W
< 5VA
Active power consumption
< 0.5VA
1.7.5 Measuring accuracy
Electricity meter measuring accuracy for active energy:
Class 0.2s（IEC62053-22）
Electricity meter measuring accuracy for reactive energy:
Class 2 （ IEC62053-23 ） /
Class 1(IEC62053-21)
1.7.6 Calendar clock accuracy
Accuracy:
< 0.5S/Day
Battery of Clock years of working:
4.5“Real-time Clock”）
15 years （ see details
1.7.7 Display
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Display Type
LCD
Number of position value field:
Digit size:
4.2 x 8mm
See 4.7 introduction of LCD
Up to 8
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HXT300 Series user manual
1.7.8 Impulse constant
Active energy Constant: :
10000 imp/kWh mutual-inductor
Reactive energy Constant:
10000imp/kWh
mutual-inductor
Impulse constant is programmable according to requirement
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1.7.9 Error test output
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Type: LED
Wavelength:
Pulse width:
625ns
35ms
1.7.10 Communication interface
Optical interface
 Communication standards: IEC62056-21 E model
 Baud rate: 300bps for standby，9600 bps for communication
（Configurable between 1200～9600bps）
RS-232 port (with RS232 interface)
 Communication protocol standard:: DLMS HDLC
 Baud rate: 1200~115200 bps（Configurable）for high speed
interface
 Support standard Modem connect
RS-485 port (with RS485 interface)
 Communication protocol standard: DLMS HDLC
 Baud rate: 1200~9600 bps （ Configurable ） for low speed
interface
 Baud rate: 1200~38400 bps （ Configurable ） for high speed
interface
1.7.11 Temperature range
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Operation display:
–30℃ to +70℃
Operation meter:
–40℃ to +70℃
Storage and delivery:
–40℃ to +85℃
1.7.12 Dielectric strength
Exchange withstand voltage
4KV 1min
 Insulation grade:
Impulse voltage
 Impulse voltage 1.2/50µs mains connections: 8KV
1.7.13 Electromagnetic compatibility
Static electricity
8KV
 Contact discharge:
15KV
 Air discharge:
Radiofrequency electromagnetic field (80MHz to 2000MHz)
 10V/m (plus current)
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 30V/m(Without current)
Rapid pulse groups
 4KV
Surge
 4KV
1.8 Weight and mounting dimension
Weight ----------------------- About.1.6kg (without communication module)
(Take type 1CB44NL2P2S4244M1IA for example. Different type the weight is different.)
Diagram.1.8.1 mounting dimension Diagram (IEC1107 optics port)
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Width ------------------------175 mm
Length -----------------------293 mm
Height ------------------------77 mm
Terminal cover --------------60 mm for connection
Diagram.1.8.2 Terminal window Diagram (Asymmetric type BS wiring)
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voltage wiring hole diameter ------------------ 4.5 mm
Current wiring hole diameter ------------------ 6mm
Voltage wiring screw --------------------- 2 个 M3 screw
Current wiring screw --------------------- 2 个 M3 screw
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HXT300 Series user manual
1.9 Connection Diagram
Diagram1.9.1 Connect Diagram (3P4W with neutral metering, low voltage mutual inductance
connection)
Diagram1.9.2 Connect Diagram (3P4W, low voltage mutual inductance connection)
(If 3P3W meter, no need connect L2 to 10, if 3P4W meter use in 3P3W situation, should connect L2 to
10.)
Diagram1.9.3 Connect Diagram (3P4W with neutral metering, high voltage mutual inductance
connection)
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Diagram1.9.4 Connect Diagram (3P3W, high voltage mutual inductance)
(If 3P3W meter, no need connect L2 to 10, if 3P4W meter use in 3P3W situation, should connect L2 to
10)
1.10 Auxiliary terminal connection
There are many options on auxiliary terminal, including:
 Two-way RS-485 communication port, take up 5 terminals
 Impulse signal output port can select different signal output, take up 7 terminals.
 Relay control output port, can choose optocoupler relay output or IGBT output,
take up 5 terminals
 IO output testing port, can choose external signal testing, take up 5 terminals
IO output control port，can choose external control input, take up 3 terminals
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 One way RJ45 interface, use for RS-232 communication.
See details in chapter 1.6
1. This series meter total takes up 25 terminals(see Diagram
1.10.1 ), so when select the meter type should not exceed 25
terminals.
Diagram1.10.1 Auxiliary terminal Diagram\
1.11 Auxiliary terminal explanation
Terminal type
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Terminal No
Public
Electrical feature
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HXT300 Series user manual
terminal
Control output 14,15,16,17,18
port(Maximum
4 way)
18
Control
output
(passive)
High withstand voltage:480VDC
High withstand current:100mA
Conduction interval: 50~1000ms
configurable
Zi < 10Ω
1、Can connect the magnetic relay
control output, long open or closed
notes.
Maximum 250VAC/1A。
2 、 Can connect dry reed relay
control output
Relay control in the form of impulse
output
The purpose to control external
relay are: closed
Maximum 250VAC/1A。
Breakover internal: 50~1000ms 可
configurable
Control
input 19,20,21
port(Maximum
2 way)
21
Control input(passive)
High withstand voltage: 240VAC
Conduction interval: long open or
long close
Impulse output
port(Maximum
4 way)
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22,32,23,33,24,34,25 25
The 22 specially for
active
impulse
output, 32 specially
for reactive impulse
output, 23 specially
for
seconds
impulse input, other
connetion port are
configurable
according
to
requirement
Impulse output(passive)
High withstand current:27VDC
Conduction interval:35ms~50ms
Zi < 300Ω
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HXT300 Series user manual
Impulse input 27,37,28,38,29
port(Maximum
4 way)
29
Impulse input（active）
High withstand current: forbid
voltage input
Conduction interval: ≥5ms
For meter box open testing
Input signal without voltage, only
foron-off state
Breakover, it means the meter box
are closed
Break, it means the meter box are
opening
RS-485
Interface 1
30,40, 39
39
RS-485 Communication interface
40 corresponding RS-485 A。
30 corresponding RS-485 B。
RS-485
Interface 2
31,41, 39
39
RS-485 Communication interface
41 corresponding RS-485 A。
31 corresponding RS-485 B。
RJ-45 Interface
RJ45
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HXT300 Series user manual
2 Safety
2.1 Safety information
In the subsequent chapters will pass the following warning signs to indicate that the risk
level, probability of failure
Warning：May leads to personal injury or death
Warning：May leads to personal injury or material loss
Note： Products may be damaged in the work environment, or with
detailed description and other information to remind
In addition to dangerous level, also describes the dangers type and source and
possible sonsequences and step for dealing with dangerous in the safety information
2.2 Responsibilities
The owner of the meters – normally the power supply company – is responsible that all
persons engaged on work with meters:
 Have read and understood the relevant sections of the user
manual
 Sufficiently qualified for the work to be performed
 Strictly observe the safety regulations(according to section 2.3)
and the operating information in the individual chapters
The owner of the meters bears responsibility:
 For the protection of persons
 Prevention of material damage
 And the training of personnel
We provide training for this purpose on specific equipment; please contact us if interested.
2.3 Safety regulations
The following safety regulations must be observed at all times:
 The conductors to which the meter will be connected must not be
under voltage during installation or change of the meter. Contact
with live parts is dangerous to life. The relevant preliminary fuses
should therefore be removed and kept in a safe place until the
work is completed, so that other persons cannot replace them
unnoticed.
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Local safety regulations must be observed. Installation of the
meters must be performed exclusively by technically qualified
and suitably trained personnel.
The meter must be held securely during installation. They can
cause injuries if dropped.
Meters which have fallen must not be installed, even if no
damage is apparent. They must be returned for testing to the
service and repair department responsible (or the manufacturer).
Internal damage can result in functional disorders or
short-circuits.
The meter must on no account be cleaned with running water or
with high pressure devices. Water penetrating can cause
short-circuits.
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HXT300 Series user manual
3 Mechanical constructions
3.1 Case
The internal construction of the meter is not described here, as meter protected by
manufacturer seal. The meter couldn’t be opened after delivery. The front door is only
secured by a plastic seal and can be opened to operate the button, to change the battery.
The following drawing shows the meter components visible from outside:
：
1
8
2
9
3
4
10
5
6
11
7
Diagram.3.1.1 Front view of HXT300 (IEC1107 optical port, the left meter with keypaid, the right
meter without keypaid)
1. Suspension hanger.
4. Meter cover.
7. Terminal cover.
10. Optical port.
2. Meter base..
5. Battery cover.seal.
8. Meter covers seal.
11. Terminal covers seal.
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3. Display button.
6. Battery cover.
9. (LCD).
The front door must be opened to access to the battery
compartment and front door open detection button.
The battery and communication module can be replaced when
only the front cover is opened instead of the terminal cover.
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HXT300 Series user manual
Diagram.3.1.2 HXT300 Meter with front cover opens (IEC1107 optical port)
1. Battery.
2. Input and output terminal, low voltage part
3. RS-485 communication port.
4. Input and output terminal, high voltage part
. 5. RS-232 communication port.
3.2 Seal
Diagram.3.2.1 meter case seal
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Diagram.3.2.2 meter cover seal
Diagram.3.2.3 Battery cover seal
3.3 Connections
The terminal block with the meter connections is situated under the terminal cover. Two
company seals in the fixing screw of the terminal cover prevent unauthorized access to
the phase connections and therefore to unrecorded current consumption.
Diagram.3.3.1 HXT300 Front view of terminal cover open (IEC1107 optical port)
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4 Function
4.1 Block Schematic Diagram
Diagram4.1.1 Meter block schematic diagram
Inputs:
The main inputs to the meter are:
● Phase line L1, L2, L3, neutral line N, current I1, I2, I3
For the power supply to the meter
For sampling signal of measure
● Auxiliary power supply La & Na, supply meter working power
● Push buttons
For scrolling display
For order relay connecting and disconnecting manually
● 4-way pulse input & 2-way control input
● External data signal inputs through communication interface
Outputs:
The main outputs to the meter are:
● LCD liquid crystal display with display buttons
● Electronic test impulse & 4-way pulse output
● 4-way control output
● Signal outputs through communication interface
Measuring system:
Sample and calculate the input power grid signal to get related information, phase sequence has
no affect on meter measurement, including following parameters:
● Active power (3 phases)
● Reactive power (3 phases)
● Voltage (3 phases)
● Current (3 phases)
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● Frequency (one of phase with voltage)
● Power factor (3 phases)
● Harmonic voltage ( 3 phases) (total,3-31 odd harmonic)
● Harmonic current (3 phases) (total,3-31 odd harmonic)
●V²h (3 phases)
●I²h (3 phases)
Electric test pulse:
Active and Reactive power pulse is generated for testing the error of the meter.
Power supply:
1. The supply voltage for the meter is obtained from the power grid, ensuring the normal
operation of internal parts of the meter.
2. The supply voltage for the meter is obtained from auxiliary power supply.
Battery:
The battery supply connected in parallel with the normal supply ensures the operation of the
meter free from interruption. When the normal supply is switched off, the backup battery has the
capability to support the RTC in meter and detect cover opening tampering events.
RTC:
Real Time Clock is served as a time-base for calendar clock in the meter. It’s mainly
supported by the power supply when the grid power is on, but once interruption occurs,
battery will ensure the normal operation of meter instead
Memory:
There are two kinds of memory shown as below:
1, FRAM, for recording data which is used frequently, such as electricity energy,
meter parameters, etc, memory capacity is 256K (1K=1024Bytes)
2,NORFlash memory ， this meter has one piece of such memory, total memory
capacity is 8M (1M=1048576Bytes) for storing event record, load data and billing
data,etc.
Output & input:
For client special requirement function extension, such as output relevant pulse, control
external device, etc.
Communication interface:
There are four types of interfaces as below:

Optical interface: for host computers or HHU communication read-write
with near-infrared communication.

RS-232: For local communication or external modem connection.
 RS485 communication interface, which is used for local maintenance, for
SCADA interface and establishing RS485 communication network.
4.2 Measuring Unit
4.2.1 Measurement overview
Data flow:
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Diagram4.2.1.1 Data flow of the measuring unit
Analogue input signals:
Analogue signals include analogue voltage and current
Signal conversion:
The AD converter in meter measuring system generates calibrated instantaneous digital values
of voltage and current from the analogue input signals.
Data preparation:
Signal processor determines the following digital mean values (averaged for one second in each
case) from the instantaneous values and current generated by AD converter. Following are all
mean values in 1 second.
 Active power (with sign for direction of power) (3 phases)
 Reactive power (with sign for direction of power) (3 phases)
 Apparent power (3 phases)
 Current (3 phases)
 Three phase current algebraic sum
 Power factor (3 phases)
 Power factor angle(3 phases)
 Voltage (3 phases)
 Power grid frequency
 Harmonic voltage (3 phases ) (total,3-31 odd harmonic)
 Harmonic current (3 phases ) (total,3-31 odd harmonic)
Data processing:
The microprocessor calculates the following measured quantities from the mean values
provided by the signal processor.
 Mean forward active power in 1 second (3 phases)
 Mean reverse active power in 1 second (3 phases)
 Mean forward reactive power in 1 second (3 phases)
 Mean reverse reactive power in 1 second (3 phases)
 Apparent power in 1 second (3 phases)
 Current in 1 second (3 phases)
 Power factor in 1 second (3 phases)
 Power factor angle in 1 second (3 phases)
 Voltage in 1 second (3 phases)
 Power grid frequency
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4.2.2 Signal Conversion and Processing
Diagram4.2.2.1 Diagram of signal conversion and processing
Signal input circuits:
● Analog voltage signal is divided into low sampling voltages by high resistance voltage
dividers of which resistance is 1.24Ω and 1000Ω respectively. The proportional amount is 1401:1.
For example, if the input signal U2 is 230V, the sampling voltage ULX will be 164.168mV and the
passing current will be 164.2µA. Then the apparent power of the voltage sampling circuits can be
calculated as 37.76mVA.
● Analog current signal is obtained by using a shunt placed in the meter. The ratio of shunt is
2000:1. Sampling resistance is 30Ω, when applying an input current of 10A to the meter, the
corresponding sampling voltage U1 is 150mV,then the apparent power is less 0.75mVA.
Digitizing:
The input analogue signals is converted by AD converter in measuring system and then filtered.
After that, the signals are calibrated and finally form the required digital instantaneous values.
Mean value formation:
From digital instantaneous values, measuring system calculates the mean values per second by
integral calculus. Then the microprocessor scans these values at intervals of one second for further
processing.
4.2.3 Data processing
By scanning the mean values per second (active power, voltage, current, frequency, power
factor), microprocessor forms related measured quantities. Meanwhile the active power per second
is regarded as the active energy per second to be added into the total active energy consumption,
the reactive power per second is regarded as the reactive energy per second to be added into the
total reactive energy consumption, the apparent power per second is regarded as the apparent
energy per second to be added into the total apparent energy consumption.
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4.2.4 Display and readout of the measured quantities
The data mentioned above can be displayed and read with communication manners, and the
format of display and communication is shown as table 4.2.4.1
Tab4.2.4.1 Formats of display and communication readout of measured quantities
Type
OBIS
Display Format
ID / OBIS
Communication
Format/Unit
Forward active power of 21.7.0
phase A
xxxx.xxxx kW
3 / 1-0:21.7.0.255
U32
/
0.1W
Reverse active power of 21.7.1
phase A
xxxx.xxxx kW
3 / 1-0:21.7.1.255
U32
/
0.1W
Forward reactive power of 23.7.0
phase A
xxxx.xxxx kvar
3 / 1-0:23.7.0.255 U32
0.1var
Reverse reactive power of 23.7.1
phase A
xxxx.xxxx kvar
3 / 1-0:23.7.1.255
U32
/ 0.1 var
Apparent power of phase A
29.7.0
xxxx.xxxx kVA
3 / 1-0:29.7.0.255
U32
/ 0.1 VA
Voltage of phase A
32.7.0
xxxxxx.xx V
3 / 1-0:32.7.0.255
U16
/
Current of phase A
31.7.0
xxxxxx.xx A
3 / 1-0:31.7.0.255
U16
0.01A
Power factor of phase A
33.7.0
x.xxx
3 / 1-0:33.7.0.255
U16
/
0.001
Forward active power of 41.7.0
phase B
xxxx.xxxx kW
3 / 1-0:41.7.0.255
U32
/
0.1W
Reverse active power of 41.7.1
phase B
xxxx.xxxx kW
3 / 1-0:41.7.1.255
U32
/
0.1W
Forward reactive power of 43.7.0
phase B
xxxx.xxxx kvar
3 / 1-0:43.7.0.255 U32
0.1var
Reverse reactive power of 43.7.1
phase B
xxxx.xxxx kvar
3 / 1-0:43.7.1.255
U32
/ 0.1 var
Apparent power of phase B
49.7.0
xxxx.xxxx kVA
3 / 1-0:49.7.0.255
U32
/ 0.1 VA
Voltage of phase B
52.7.0
xxxxxx.xx V
3 / 1-0:52.7.0.255
U16
/
Current of phase B
51.7.0
xxxxxx.xx A
3 / 1-0:51.7.0.255
U16
0.01A
Power factor of phase B
53.7.0
x.xxx
3 / 1-0:53.7.0.255
U16
/
0.001
Forward active power of 61.7.0
phase C
xxxx.xxxx kW
3 / 1-0:61.7.0.255
U32
/
0.1W
Reverse active power of 61.7.1
phase C
xxxx.xxxx kW
3 / 1-0:61.7.1.255
U32
/
0.1W
Forward reactive power of 63.7.0
phase C
xxxx.xxxx kvar
3 / 1-0:63.7.0.255 U32
0.1var
Reverse reactive power of 63.7.1
phase C
xxxx.xxxx kvar
3 / 1-0:63.7.1.255
U32
/ 0.1 var
Apparent power of phase C
69.7.0
xxxx.xxxx kVA
3 / 1-0:69.7.0.255
U32
/ 0.1 VA
Voltage of phase C
72.7.0
xxxxxx.xx V
3 / 1-0:72.7.0.255
U16
/
Current of phase C
71.7.0
xxxxxx.xx A
3 / 1-0:71.7.0.255
U16
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HXT300 Series user manual
0.01A
Power factor of phase C
Total power
three-phase
factor
73.7.0
x.xxx
3 / 1-0:73.7.0.255
U16
/
0.001
of 13.7.0
x.xxx
3 / 1-0:13.7.0.255
U16
/
0.001
Frequency
14.7.0
xx.xx Hz
3 / 1-0:14.7.0.255
U16
/ 0.01Hz
BA voltage angle
/
/
3 / 1-0:81.7.1.255
U16
/ 0.1 度
CA voltage angle
/
/
3
/
1-0:81.7.20.255
U16
/ 0.1 度
Total forward active power 1.7.0
of three-phase
xxxx.xxxx kW
3 / 1-0:1.7.0.255
U32
/
0.1W
Total reverse active power 2.7.0
of three-phase
xxxx.xxxx kW
3 / 1-0:2.7.0.255
U32
/
0.1W
Total forward reactive
power of three-phase
3.7.0
xxxx.xxxx kvar
3 / 1-0:3.7.0.255
U32
0.1var
/
Total
reverse
reactive
power of three-phase
4.7.0
xxxx.xxxx kvar
3 / 1-0:4.7.0.255
U32
0.1var
/
3/
-0:32.7.124.255
U16
/0.01V
3/
-0:52.7.124.255
U16
/0.01V
3/
-0:72.7.124.255
U16
/0.01V
N times harmonic voltage of phase A
(N=3-31,odd number)
3/ 1-0:32.7.N.255
U16
/0.01V
N times harmonic voltage of phase C
(N=3-31,odd number)
3
/
1-0:52.7.N.255
U16
/0.01V
N times harmonic voltage of phase C
(N=3-31,odd number)
3
/
1-0:72.7.N.255
U16
/0.01V
Fundamental wave current
3/
-0:31.7.124.255
U16
/0.01A
3/
-0:51.7.124.255
U16
/0.01A
3/
-0:71.7.124.255
U16
/0.01A
of phase C
N times harmonic current of phase A
(N=3-31,odd number)
3
/
1-0:31.7.N.255
U16
/0.01A
N times harmonic current of phase B
(N=3-31,odd number)
3
/
1-0:51.7.N.255
U16
/0.01A
N times harmonic current of phase C
(N=3-31,odd number)
3
/
1-0:71.7.N.255
U16
/0.01A
1/ 0-0:96.9.0.255
S16
degree
Fundamental wave voltage
of phase A
Fundamental wave voltage
of phase B
Fundamental wave voltage
of phase C
of phase A
Fundamental wave current
of phase B
Fundamental wave current
Meter internal temperature
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U16 means unsigned 16-bit integer;S16 means
signed 16-bit integer.
Forward and reverse calculation method of active,
reactive power is same as active and reactive
energy’s calculation, see details in chapter 4.3.2
Voltage angle between phase B and phase A is
calculated only when voltage of phase A and phase B
exists; otherwise, it is default as 0. Invalid for 3P3W
meter
Voltage angle between phase C and phase A is
calculated only when voltage of phase A and phase B
exists; otherwise, it is default as 0. Invalid for 3P3W
meter
Phase A data corresponding to AB phase data in
3P3W meter
Phase C data corresponding to CB phase data in
3P3W meter
Phase B data corresponding to 0 in 3P3W meter
Three phase total power factor calculate method see
details in chapter 4.3.2
4.3 Energy Accumulation
4.3.1 Overview
Diagram4.3.1.1 Block diagram of energy accumulation
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Microprocessor obtains the measuring data per second, after calculating, fifteen data are
obtained: forward active power in 1s of three phases (namely forward active accumulation energy
within 1s), reverse active power in 1s of three phases (namely reverse active accumulation energy
within 1s), forward reactive power in 1s of three phases (namely forward reactive accumulation
energy within 1s), reverse reactive power in 1s of three phases (namely reverse reactive
accumulation energy within 1s), apparent power in 1s of three phases (namely apparent
accumulation energy within 1s), above fifteen values are as input value of energy accumulation
and are respectively accumulated into forward active total energy register, reverse active total
energy register, forward reactive total energy register, reverse reactive total energy register,
forward apparent total energy register, reverse apparent total energy register, quadrant I reactive
total energy register, quadrant II reactive energy register, quadrant III reactive energy register,
quadrant IV reactive energy register as well as corresponding tariff energy register according to
current tariff.
Microprocessor then selects the information from the energy registers for display, load profile
and remote readout.
Registers are included as follows:
Total energy of three phases
 Total active energy register (TA)
 Total active energy tariff 1 register (TA1)
 Total active energy tariff 2 register (TA2)
 Total active energy tariff 3 register (TA3)
 Total active energy tariff 4 register (TA4)
 Total active energy tariff 5 register (TA5)
 Total active energy tariff 6 register (TA6)
 Total active energy tariff 7 register (TA7)
 Total active energy tariff 8 register (TA8)
 Total forward active energy register (+A)
 Total forward active energy tariff 1 register (+A1)
 Total forward active energy tariff 2 register (+A2)
 Total forward active energy tariff 3 register (+A3)
 Total forward active energy tariff 4 register (+A4)
 Total forward active energy tariff 5 register (+A5)
 Total forward active energy tariff 6 register (+A6)
 Total forward active energy tariff 7 register (+A7)
 Total forward active energy tariff 8 register (+A8)
 Total reverse active energy register (-A)
 Total reverse active energy tariff 1 register (-A1)
 Total reverse active energy tariff 2 register (-A2)
 Total reverse active energy tariff 3 register (-A3)
 Total reverse active energy tariff 4 register (-A4)
 Total reverse active energy tariff 5 register (-A5)
 Total reverse active energy tariff 6 register (-A6)
 Total reverse active energy tariff 7 register (-A7)
 Total reverse active energy tariff 8 register (-A8)
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Total forward reactive energy register (+R)
Total forward reactive energy tariff 1 register (+R1)
Total forward reactive energy tariff 2 register (+R2)
Total forward reactive energy tariff 3 register (+R3)
Total forward reactive energy tariff 4 register (+R4)
Total forward reactive energy tariff 5 register (+R5)
Total forward reactive energy tariff 6 register (+R6)
Total forward reactive energy tariff 7 register (+R7)
Total forward reactive energy tariff 8 register (+R8)
Total reverse reactive energy register (-R)
Total reverse reactive energy tariff 1 register (-R1)
Total reverse reactive energy tariff 2 register (-R2)
Total reverse reactive energy tariff 3 register (-R3)
Total reverse reactive energy tariff 4 register (-R4)
Total reverse reactive energy tariff 5 register (-R5)
Total reverse reactive energy tariff 6 register (-R6)
Total reverse reactive energy tariff 7 register (-R7)
Total reverse reactive energy tariff 8 register (-R8)
Total forward apparent energy register (+Q)
Total forward apparent energy tariff 1 register (+Q1)
Total forward apparent energy tariff 2 register (+Q2)
Total forward apparent energy tariff 3 register (+Q3)
Total forward apparent energy tariff 4 register (+Q4)
Total forward apparent energy tariff 5 register (+Q5)
Total forward apparent energy tariff 6 register (+Q6)
Total forward apparent energy tariff 7 register (+Q7)
Total forward apparent energy tariff 8 register (+Q8)
Total reverse apparent energy register (-Q)
Total reverse apparent energy tariff 1 register (-Q1)
Total reverse apparent energy tariff 2 register (-Q2)
Total reverse apparent energy tariff 3 register (-Q3)
Total reverse apparent energy tariff 4 register (-Q4)
Total reverse apparent energy tariff 5 register (-Q5)
Total reverse apparent energy tariff 6 register (-Q6)
Total reverse apparent energy tariff 7 register (-Q7)
Total reverse apparent energy tariff 8 register (-Q8)
Total Quadrant I reactive energy register (R1)
Total Quadrant I reactive energy tariff 1 register (R11)
Total Quadrant I reactive energy tariff 2 register (R12)
Total Quadrant I reactive energy y tariff 3 register (R13)
Total Quadrant I reactive energy tariff 4 register (R14)
Total Quadrant I reactive energy tariff 5 register (R15)
Total Quadrant I reactive energy tariff 6 register (R16)
Total Quadrant I reactive energy tariff 7 register (R17)
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
 Total Quadrant I reactive energy tariff 8 register (R18)
 Total Quadrant II reactive energy register (R2)
 Total Quadrant II reactive energy tariff 1 register (R21)
 Total Quadrant II reactive energy tariff 2 register (R22)
 Total Quadrant II reactive energy y tariff 3 register (R23)
 Total Quadrant II reactive energy tariff 4 register (R24)
 Total Quadrant II reactive energy tariff 5 register (R25)
 Total Quadrant II reactive energy tariff 6 register (R26)
 Total Quadrant II reactive energy tariff 7 register (R27)
 Total Quadrant II reactive energy tariff 8 register (R28)
 Total Quadrant III reactive energy register (R3)
 Total Quadrant III reactive energy tariff 1 register (R31)
 Total Quadrant III reactive energy tariff 2 register (R32)
 Total Quadrant III reactive energy y tariff 3 register (R33)
 Total Quadrant III reactive energy tariff 4 register (R34)
 Total Quadrant III reactive energy tariff 5 register (R35)
 Total Quadrant III reactive energy tariff 6 register (R36)
 Total Quadrant III reactive energy tariff 7 register (R37)
 Total Quadrant III reactive energy tariff 8 register (R38)
 Total Quadrant IV reactive energy register (R4)
 Total Quadrant IV reactive energy tariff 1 register (R41)
 Total Quadrant IV reactive energy tariff 2 register (R42)
 Total Quadrant IV reactive energy y tariff 3 register (R43)
 Total Quadrant IV reactive energy tariff 4 register (R44)
 Total Quadrant IV reactive energy tariff 5 register (R45)
 Total Quadrant IV reactive energy tariff 6 register (R46)
 Total Quadrant IV reactive energy tariff 7 register (R47)
 Total Quadrant IV reactive energy tariff 8 register (R48)
Energy of phase A
 Forward active energy register of phase A (+AaR)
 Reverse active energy register of phase A (-AaR)
 Forward reactive energy register of phase A (+RaR)
 Reverse reactive energy register of phase A (-RaR)
 Forward apparent energy register of phase A (+QaR)
 Reverse apparent energy register of phase A (-QaR)
 Quadrant I reactive energy register of phase A (R1aR)
 Quadrant II reactive energy register of phase A (R2aR)
 Quadrant III reactive energy register of phase A (R3aR)
 Quadrant IV reactive energy register of phase A (R4aR)
Energy of phase B
 Forward active energy register of phase B (+AbR)
 Reverse active energy register of phase B (-AbR)
 Forward reactive energy register of phase B (+RbR)
 Reverse reactive energy register of phase B (-RbR)
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 Forward apparent energy register of phase B (+QbR)
 Reverse apparent energy register of phase B (-QbR)
 Quadrant I reactive energy register of phase B (R1bR)
 Quadrant II reactive energy register of phase B (R2bR)
 Quadrant III reactive energy register of phase B (R3bR)
 Quadrant IV reactive energy register of phase B (R4bR)
Energy of phase C
 Forward active energy register of phase C (+AcR)
 Reverse active energy register of phase C (-AcR)
 Forward reactive energy register of phase C (+RcR)
 Reverse reactive energy register of phase C (-RcR)
 Forward apparent energy register of phase C (+QcR)
 Reverse apparent energy register of phase C (-QcR)
 Quadrant I reactive energy register of phase C (R1cR)
 Quadrant II reactive energy register of phase C (R2cR)
 Quadrant III reactive energy register of phase C (R3cR)
 Quadrant IV reactive energy register of phase C (R4cR)
4.3.2 Energy Accumulation Method
Diagram4.3.2.1 four quadrant power Diagram
Total Active, apparent energy accumulation:
 TAR = |+A| + |-A|
or
+AR = |+A| + |-A|
 +AR = |+A|
-A
R=
|-A|

or
+QR=|+Q| + |-Q|
 +QR=|+Q|
 -QR=|-Q|
Note：
 |+A|: import active energy
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HXT300 Series user manual
 |-A|: export active energy
 |+Q|: import apparent energy
 |-Q|: export apparent energy
Reactive energy accumulation
It can be chosed as following each one of the four types
+RR= |+Ri|+|+Rc|+|-Ri|+|-Rc|
-RR = 0
+RR = |+Ri|+|+Rc|
-RR = |-Ri|+|-Rc|
+RR = |+Ri|+ |-Rc|
-RR = |+Rc|+|-Ri|
+RR = |+Ri|+|+Rc|+|-Ri|+|-Rc|
-RR = |+Rc|+|-Ri|
Note：
|+Ri|：Quadrant I reactive energy
|+Rc|：Quadrant II reactive energy
|-Ri|：Quadrant III reactive energy
|-Rc|：Quadrant IV reactive energy
Accumulation energy of each phase
There are two accumulation methods:
 Algebraic accumulation: algebraic of three phase active, reactive and apparent energy in
each second are as inputting data source;
 Absolute value accumulation: three phase energy is regarded as three independent single
phase energy to accumulate, three phase energy always equal to sum of each phase.
Caculation of the total power factor
 current accumulation energy of each phase is the Algebraic accumulation
total power factor= algebraic sum of each phase active energy in 1s/ algebraic sum of
each phase apparent energy in 1s*100%
 current accumulation energy of each phase is absolute value sum
total power factor= absolute value sum of each phase active energy in 1s/ absolute value
sum m of each phase apparent energy in 1s*100%
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4.3.3 Display and readout of Energy consumption
The value of energy consumption has the resolution 0.0001kWh. The format of the data
storage is seen below Diagram4.3.3.1
Diagram4.3.3.1 The format of energy data storage
All the energy data can be displayed and read with communication manners, and the format
of display and communication readout is noticed as table 4.3.3.1.(Notes: display of decimal digits
can be set, meter default display 2 decimal digits)
Tab4.3.3.1 Energy display format and communiation readout format
Type
OBIS
Format of Display
ID / OBIS
Formats
Communication/Unit
TA
15.8.0
xxxxxx.xx kWh
3 / 1-0:15.8.0.255
U32
/
0.1wh
TA1
15.8.1
xxxxxx.xx kWh
3 / 1-0:15.8.1.255
U32
/
0.1wh
TA2
15.8.2
xxxxxx.xx kWh
3 / 1-0:15.8.2.255
U32
/
0.1wh
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TA3
15.8.3
xxxxxx.xx kWh
3 / 1-0:15.8.3.255
U32
/
0.1wh
TA4
15.8.4
xxxxxx.xx kWh
3 / 1-0:15.8.4.255
U32
/
0.1wh
TA5
15.8.5
xxxxxx.xx kWh
3 / 1-0:15.8.5.255
U32
/
0.1wh
TA6
15.8.6
xxxxxx.xx kWh
3 / 1-0:15.8.6.255
U32
/
0.1wh
TA7
15.8.7
xxxxxx.xx kWh
3 / 1-0:15.8.7.255
U32
/
0.1wh
TA8
15.8.8
xxxxxx.xx kWh
3 / 1-0:15.8.8.255
U32
/
0.1wh
+A
+A1
+A2
+A3
+A4
+A5
+A6
+A7
+A8
-A
-A1
-A2
-A3
-A4
-A5
-A6
-A7
-A8
+R
+R1
+R2
+R3
+R4
+R5
+R6
+R7
+R8
-R
-R1
-R2
-R3
-R4
-R5
-R6
-R7
-R8
+Q
+Q1
1.8.0
1.8.1
1.8.2
1.8.3
1.8.4
1.8.5
1.8.6
1.8.7
1.8.8
2.8.0
2.8.1
2.8.2
2.8.3
2.8.4
2.8.5
2.8.6
2.8.7
2.8.8
3.8.0
3.8.1
3.8.2
3.8.3
3.8.4
3.8.5
3.8.6
3.8.7
3.8.8
4.8.0
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
4.8.6
4.8.7
4.8.8
9.8.0
9.8.1
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kWh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kVAh
xxxxxx.xx kVAh
3 / 1-0:1.8.0.255
3 / 1-0:1.8.1.255
3 / 1-0:1.8.2.255
3 / 1-0:1.8.3.255
3 / 1-0:1.8.4.255
3 / 1-0:1.8.5.255
3 / 1-0:1.8.6.255
3 / 1-0:1.8.7.255
3 / 1-0:1.8.8.255
3 / 1-0:2.8.0.255
3 / 1-0:2.8.1.255
3 / 1-0:2.8.2.255
3 / 1-0:2.8.3.255
3 / 1-0:2.8.4.255
3 / 1-0:2.8.5.255
3 / 1-0:2.8.6.255
3 / 1-0:2.8.7.255
3 / 1-0:2.8.8.255
3 / 1-0:3.8.0.255
3 / 1-0:3.8.1.255
3 / 1-0:3.8.2.255
3 / 1-0:3.8.3.255
3 / 1-0:3.8.4.255
3 / 1-0:3.8.5.255
3 / 1-0:3.8.6.255
3 / 1-0:3.8.7.255
3 / 1-0:3.8.8.255
3 / 1-0:4.8.0.255
3 / 1-0:4.8.1.255
3 / 1-0:4.8.2.255
3 / 1-0:4.8.3.255
3 / 1-0:4.8.4.255
3 / 1-0:4.8.5.255
3 / 1-0:4.8.6.255
3 / 1-0:4.8.7.255
3 / 1-0:4.8.8.255
3 / 1-0:9.8.0.255
3 / 1-0:9.8.1.255
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
/
/
/
/
/
/
/
/
/
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/
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/
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/
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1wh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1vah
0.1vah
36 / 129
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
+Q2
+Q3
+Q4
+Q5
+Q6
+Q7
+Q8
-Q
9.8.2
9.8.3
9.8.4
9.8.5
9.8.6
9.8.7
9.8.8
10.8.0
xxxxxx.xx kVAh
xxxxxx.xx kVAh
xxxxxx.xx kVAh
xxxxxx.xx kVAh
xxxxxx.xx kVAh
xxxxxx.xx kVAh
xxxxxx.xx kVAh
xxxxxx.xx kVAh
-Q1
10.8.1
xxxxxx.xx kVAh
-Q2
10.8.2
xxxxxx.xx kVAh
-Q3
10.8.3
xxxxxx.xx kVAh
-Q4
10.8.4
xxxxxx.xx kVAh
-Q5
10.8.5
xxxxxx.xx kVAh
-Q6
10.8.6
xxxxxx.xx kVAh
-Q7
10.8.7
xxxxxx.xx kVAh
-Q8
10.8.8
xxxxxx.xx kVAh
+R1
+R11
+R12
+R13
+R14
+R15
+R16
+R17
+R18
+R2
+R21
+R22
+R23
+R24
+R25
+R26
+R27
+R28
+R3
5.8.0
5.8.1
5.8.2
5.8.3
5.8.4
5.8.5
5.8.6
5.8.7
5.8.8
6.8.0
6.8.1
6.8.2
6.8.3
6.8.4
6.8.5
6.8.6
6.8.7
6.8.8
7.8.0
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
37 / 129
3 / 1-0:9.8.2.255
3 / 1-0:9.8.3.255
3 / 1-0:9.8.4.255
3 / 1-0:9.8.5.255
3 / 1-0:9.8.6.255
3 / 1-0:9.8.7.255
3 / 1-0:9.8.8.255
3
/
1-0:
10.8.0.255
3
/
1-0:
10.8.1.255
3
/
1-0:
10.8.2.255
3
/
1-0:
10.8.3.255
3
/
1-0:
10.8.4.255
3
/
1-0:
10.8.5.255
3
/
1-0:
10.8.6.255
3
/
1-0:
10.8.7.255
3
/
1-0:
10.8.8.255
3 / 1-0:5.8.0.255
3 / 1-0:5.8.1.255
3 / 1-0:5.8.2.255
3 / 1-0:5.8.3.255
3 / 1-0:5.8.4.255
3 / 1-0:5.8.5.255
3 / 1-0:5.8.6.255
3 / 1-0:5.8.7.255
3 / 1-0:5.8.8.255
3 / 1-0:6.8.0.255
3 / 1-0:6.8.1.255
3 / 1-0:6.8.2.255
3 / 1-0:6.8.3.255
3 / 1-0:6.8.4.255
3 / 1-0:6.8.5.255
3 / 1-0:6.8.6.255
3 / 1-0:6.8.7.255
3 / 1-0:6.8.8.255
3 / 1-0:7.8.0.255
U32
U32
U32
U32
U32
U32
U32
U32
/
/
/
/
/
/
/
/
0.1vah
0.1vah
0.1vah
0.1vah
0.1vah
0.1vah
0.1vah
0.1vah
U32
/
0.1vah
U32
/
0.1vah
U32
/
0.1vah
U32
/
0.1vah
U32
/
0.1vah
U32
/
0.1vah
U32
/
0.1vah
U32
/
0.1vah
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
/
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/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
+R31
+R32
+R33
+R34
+R35
+R36
+R37
+R38
+R4
+R41
+R42
+R43
+R44
+R45
+R46
+R47
+R48
+Aa
-Aa
+Ra
-Ra
+Qa
-Qa
R1a
R2a
R3a
R4a
+Ab
-Ab
+Rb
-Rb
+Qb
-Qb
R1b
R2b
R3b
R4b
+Ac
-Ac
+Rc
-Rc
+Qc
-Qc
R1c
38 / 129
7.8.1
7.8.2
7.8.3
7.8.4
7.8.5
7.8.6
7.8.7
7.8.8
8.8.0
8.8.1
8.8.2
8.8.3
8.8.4
8.8.5
8.8.6
8.8.7
8.8.8
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/
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
xxxxxx.xx kvarh
/
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/
/
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3 / 1-0:7.8.1.255
3 / 1-0:7.8.2.255
3 / 1-0:7.8.3.255
3 / 1-0:7.8.4.255
3 / 1-0:7.8.5.255
3 / 1-0:7.8.6.255
3 / 1-0:7.8.7.255
3 / 1-0:7.8.8.255
3 / 1-0:8.8.0.255
3 / 1-0:8.8.1.255
3 / 1-0:8.8.2.255
3 / 1-0:8.8.3.255
3 / 1-0:8.8.4.255
3 / 1-0:8.8.5.255
3 / 1-0:8.8.6.255
3 / 1-0:8.8.7.255
3 / 1-0:8.8.8.255
3 / 1-0:21.8.0.255
3 / 1-0:22.8.0.255
3 / 1-0:23.8.0.255
3 / 1-0:24.8.0.255
3 / 1-0:29.8.0.255
3 / 1-0:30.8.0.255
3 / 1-0:25.8.0.255
3 / 1-0:26.8.0.255
3 / 1-0:27.8.0.255
3 / 1-0:28.8.0.255
3 / 1-0:41.8.0.255
3 / 1-0:42.8.0.255
3 / 1-0:43.8.0.255
3 / 1-0:44.8.0.255
3 / 1-0:49.8.0.255
3 / 1-0:50.8.0.255
3 / 1-0:45.8.0.255
3 / 1-0:46.8.0.255
3 / 1-0:47.8.0.255
3 / 1-0:48.8.0.255
3 / 1-0:61.8.0.255
3 / 1-0:62.8.0.255
3 / 1-0:63.8.0.255
3 / 1-0:64.8.0.255
3 / 1-0:69.8.0.255
3 / 1-0:70.8.0.255
3 / 1-0:65.8.0.255
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
U32
/
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0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1varh
0.1wh
0.1wh
0.1varh
0.1varh
0.1vah
0.1vah
0.1varh
0.1varh
0.1varh
0.1varh
0.1wh
0.1wh
0.1varh
0.1varh
0.1vah
0.1vah
0.1varh
0.1varh
0.1varh
0.1varh
0.1wh
0.1wh
0.1varh
0.1varh
0.1vah
0.1vah
0.1varh
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
R2c
R3c
R4c
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39 / 129
3 / 1-0:66.8.0.255
3 / 1-0:67.8.0.255
3 / 1-0:68.8.0.255
U32
U32
U32
/
/
/
0.1varh
0.1varh
0.1varh
U32 represents unsigned 32-bits integer
The maximum value of U32 is 4294967295, so the meter can
transmit the maximum energy value of 4294967.295KWh. When
the readout value exceeds this maximum, it will start from scratch.
For example, when 4294967.3kWh is shown on the LCD, the value
transmitted is 0.1kWh.
In order to keep the consistency of the value between measuring
unit with the communication readout, please make sure that the
accumulative energy consumption remains within the threshold of
4294967kWh. It assures 7.1 years of normal usage for meter under
the circumstances of 230V and 10A
CT meter display unit automatic switching,when the display energy
value is out of KWh unit it will automatically switch to MWh unit.
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
4.4 Maximum Demand calculate
4.4.1 Overview
Diagram4.4.1.1 MD measuring schematic diagram








Current demand average value: when it is still within current sliding window, this value
is calculated every minute using this expression: (accumulating energy within current
window/ numbers of period*period)
Final demand average value: after an integrating period, this value is calculated every
integrating period using this expression: (accumulating energy within current window/
numbers of period*period)
MD in current month: Max value of final demand average value in current month.
Accumulating MD: MD accumulating value of each month.
MD period:
Numbers of MD period
Integrating period: MD period* Numbers of MD period
MD accumulation and calculation start after integral minute of initial power-on of meter.
Obtained below demand register：
 Forward active MD register（+MA）
 Forward active tariff 1 MD register（+MA1）
 Forward active tariff 2 MD register（+MA2）
40 / 129
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual

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





































41 / 129
Forward active tariff 3 MD register（+MA3）
Forward active tariff 4 MD register（+MA4）
Forward active tariff 5 MD register（+MA5）
Forward active tariff 6 MD register（+MA6）
Forward active tariff 7 MD register（+MA7）
Forward active tariff 8 MD register（+MA8）
Reverse active MD register（-MA）
Reverse active tariff 1 MD register（-MA1）
Reverse active tariff 2 MD register（-MA2）
Reverse active tariff 3 MD register（-MA3）
Reverse active tariff 4 MD register（-MA4）
Reverse active tariff 5 MD register（-MA5）
Reverse active tariff 6 MD register（-MA6）
Reverse active tariff 7 MD register（-MA7）
Reverse active tariff 8 MD register（-MA8）
Forward reactive MD register（+MR）
Forward reactive tariff 1 MD register（+MR1）
Forward reactive tariff 2 MD register（+MR2）
Forward reactive tariff 3MD register（+MR3）
Forward reactive tariff 4 MD register（+MR4）
Forward reactive tariff 5 MD register（+MR5）
Forward reactive tariff 6 MD register（+MR6）
Forward reactive tariff 7 MD register（+MR7）
Forward reactive tariff 8 MD register（+MR8）
Reverse reactive tariff MD register（-MR）
Reverse reactive tariff 1 MD register（-MR1）
Reverse reactive tariff 2 MD register（-MR2）
Reverse reactive tariff 3MD register（-MR3）
Reverse reactive tariff 4 MD register（-MR4）
Reverse reactive tariff 5 MD register（-MR5）
Reverse reactive tariff 6 MD register（-MR6）
Reverse reactive tariff 7 MD register（-MR7）
Reverse reactive tariff 8 MD register（-MR8）
Forward apparent MD register（+MQ）
Forward apparent tariff 1 MD register（+MQ1）
Forward apparent tariff 2 MD register（+MQ2）
Forward apparent tariff 3 MD register（+MQ3）
Forward apparent tariff 4 MD register（+MQ4）
Forward apparent tariff 5 MD register（+MQ5）
Forward apparent tariff 6 MD register（+MQ6）
Forward apparent tariff 7 MD register（+MQ7）
Forward apparent tariff 8 MD register（+MQ8）
Reverse apparent MD register（-MQ）
Reverse apparent tariff 1 MD register（-MQ1）
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual

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


































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42 / 129
Reverse apparent tariff 2 MD register（-MQ2）
Reverse apparent tariff 3 MD register（-MQ3）
Reverse apparent tariff 4 MD register（-MQ4）
Reverse apparent tariff 5 MD register（-MQ5）
Reverse apparent tariff 6 MD register（-MQ6）
Reverse apparent tariff 7 MD register（-MQ7）
Reverse apparent tariff 8 MD register（-MQ8）
Forward active historical MD register（+HMA）
Forward active historical tariff 1 MD register（+HMA1）
Forward active historical t tariff 2 MD register（+HMA2）
Forward active historical tariff 3 MD register（+HMA3）
Forward active historical tariff 4 MD register（+HMA4）
Forward active historical tariff 5 MD register（+HMA5）
Forward active historical tariff 6 MD register（+HMA6）
Forward active historical tariff 7 MD register（+HMA7）
Forward active historical tariff 8 MD register（+HMA8）
Forward active accumulation MD register（+CMA）
Forward active tariff 1 accumulation MD register（+CMA1）
Forward active tariff 2 accumulation MD register（+CMA2）
Forward active tariff 3 accumulation MD register（+CMA3）
Forward active tariff 4 accumulation MD register（+CMA4）
Forward active tariff 5 accumulation MD register（+CMA5）
Forward active tariff 6 accumulation MD register（+CMA6）
Forward active tariff 7 accumulation MD register（+CMA7）
Forward active tariff 8 accumulation MD register（+CMA8）
Reverse active accumulation MD register（-CMA）
Reverse active tariff 1 accumulation MD register（-CMA1）
Reverse active tariff 2 accumulation MD register（-CMA2）
Reverse active tariff 3 accumulation MD register（-CMA3）
Reverse active tariff 4 accumulation MD register（-CMA4）
Reverse active tariff 5 accumulation MD register（-CMA5）
Reverse active tariff 6 accumulation MD register（-CMA6）
Reverse active tariff 7 accumulation MD register（-CMA7）
Reverse active tariff 8 accumulation MD register（-CMA8）
Forward reactive accumulation MD register（+CMR）
Forward reactive tariff 1 accumulation MD register（+CMR1）
Forward reactive tariff 2 accumulation MD register（+CMR2）
Forward reactive tariff 3 accumulation MD register（+CMR3）
Forward reactive tariff 4 accumulation MD register（+CMR4）
Forward reactive tariff 5 accumulation MD register（+CMR5）
Forward reactive tariff 6 accumulation MD register（+CMR6）
Forward reactive tariff 7 accumulation MD register（+CMR7）
Forward reactive tariff 8 accumulation MD register（+CMR8）
Reverse reactive accumulation MD register（-CMR）
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual

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























Reverse reactive tariff 1 accumulation MD register（-CMR1）
Reverse reactive tariff 2 accumulation MD register（-CMR2）
Reverse reactive tariff 3 accumulation MD register（-CMR3）
Reverse reactive tariff 4 accumulation MD register（-CMR4）
Reverse reactive tariff 5 accumulation MD register（-CMR5）
Reverse reactive tariff 6 accumulation MD register（-CMR6）
Reverse reactive tariff 7 accumulation MD register（-CMR7）
Reverse reactive tariff 8 accumulation MD register（-CMR8）
Forward apparent accumulation MD register（+CMQ）
Forward apparent tariff 1 accumulation MD register（+CMQ1）
Forward apparent tariff 2 accumulation MD register（+CMQ2）
Forward apparent tariff 3 accumulation MD register（+CMQ3）
Forward apparent tariff 4 accumulation MD register（+CMQ4）
Forward apparent tariff 5 accumulation MD register（+CMQ4）
Forward apparent tariff 6 accumulation MD register（+CMQ6）
Forward apparent tariff 7 accumulation MD register（+CMQ7）
Forward apparent tariff 8 accumulation MD register（+CMQ8）
Reverse apparent accumulation MD register（-CMQ）
Reverse apparent tariff 1 accumulation MD register（-CMQ1）
Reverse apparent tariff 2 accumulation MD register（-CMQ2）
Reverse apparent tariff 3 accumulation MD register（-CMQ3）
Reverse apparent tariff 4 accumulation MD register（-CMQ4）
Reverse apparent tariff 5 accumulation MD register（-CMQ5）
Reverse apparent tariff 6 accumulation MD register（-CMQ6）
Reverse apparent tariff 7 accumulation MD register（-CMQ7）
Reverse apparent tariff 8 accumulation MD register（-CMQ8
Accumulation method of demand is same as energy
4.4.2 Demand reset by manual
The meter with a sealing button use for manual demand rest
43 / 129
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Diagram4.4.2.1 sealing button Diagram
After open button seal, long press 3 seconds, meter will execute demand reset
command, S8 sign will show in LCD (see details in 4.7.1)
Also can through communication to execute demand reset operate
4.4.3 Display and Readout of Demand
Tab4.4.2.1 Formats of demand display and communication readout
Data
item
OBIS
Display format
Communication ID
/ OBIS
Communication format/unit
+MA
+MA1
+MA2
+MA3
+MA4
+MA5
+MA6
+MA7
+MA8
-MA
-MA1
-MA2
-MA3
-MA4
-MA5
-MA6
-MA7
-MA8
+MR
+MR1
+MR2
+MR3
1.6.0
1.6.1
1.6.2
1.6.3
1.6.4
1.6.5
1.6.6
1.6.7
1.6.8
2.6.0
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.6
2.6.7
2.6.8
3.6.0
3.6.1
3.6.2
3.6.3
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kW
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
4 / 1-0:1.6.0.255
4 / 1-0:1.6.1.255
4 / 1-0:1.6.2.255
4 / 1-0:1.6.3.255
4 / 1-0:1.6.4.255
4 / 1-0:1.6.5.255
4 / 1-0:1.6.6.255
4 / 1-0:1.6.7.255
4 / 1-0:1.6.8.255
4 / 1-0:2.6.0.255
4 / 1-0:2.6.1.255
4 / 1-0:2.6.2.255
4 / 1-0:2.6.3.255
4 / 1-0:2.6.4.255
4 / 1-0:2.6.5.255
4 / 1-0:2.6.6.255
4 / 1-0:2.6.7.255
4 / 1-0:2.6.8.255
4 / 1-0:3.6.0.255
4 / 1-0:3.6.1.255
4 / 1-0:3.6.2.255
4 / 1-0:3.6.3.255
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
44 / 129
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1var
1 var
1 var
1 var
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
+MR4
+MR5
+MR6
+MR7
+MR8
-MR
-MR1
-MR2
-MR3
-MR4
-MR5
-MR6
-MR7
-MR8
+MQ
+MQ1
+MQ2
+MQ3
+MQ4
+MQ5
+MQ6
+MQ7
+MQ8
-MQ
-MQ1
3.6.4
3.6.5
3.6.6
3.6.7
3.6.8
4.6.0
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
4.6.6
4.6.7
4.6.8
9.6.0
9.6.1
9.6.2
9.6.3
9.6.4
9.6.5
9.6.6
9.6.7
9.6.8
10.6.0
10.6.1
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kvar
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
xxxxx.xxx kVA
-MQ2
10.6.2
xxxxx.xxx kVA
-MQ3
10.6.3
xxxxx.xxx kVA
-MQ4
10.6.4
xxxxx.xxx kVA
-MQ5
10.6.5
xxxxx.xxx kVA
-MQ6
10.6.6
xxxxx.xxx kVA
-MQ7
10.6.7
xxxxx.xxx kVA
-MQ8
10.6.8
xxxxx.xxx kVA
+CMA
+CMA1
+CMA2
+CMA3
1.2.0
1.2.1
1.2.2
1.2.3
/
/
/
/
45 / 129
4 / 1-0:3.6.4.255
4 / 1-0:3.6.5.255
4 / 1-0:3.6.6.255
4 / 1-0:3.6.7.255
4 / 1-0:3.6.8.255
4 / 1-0:4.6.0.255
4 / 1-0:4.6.1.255
4 / 1-0:4.6.2.255
4 / 1-0:4.6.3.255
4 / 1-0:4.6.4.255
4 / 1-0:4.6.5.255
4 / 1-0:4.6.6.255
4 / 1-0:4.6.7.255
4 / 1-0:4.6.8.255
4 / 1-0:9.6.0.255
4 / 1-0:9.6.1.255
4 / 1-0:9.6.2.255
4 / 1-0:9.6.3.255
4 / 1-0:9.6.4.255
4 / 1-0:9.6.5.255
4 / 1-0:9.6.6.255
4 / 1-0:9.6.7.255
4 / 1-0:9.6.8.255
4 / 1-0:10.6.0.255
4
/
1-0:
10.6.1.255
4
/
1-0:
10.6.2.255
4
/
1-0:
10.6.3.255
4
/
1-0:
10.6.4.255
4
/
1-0:
10.6.5.255
4
/
1-0:
10.6.6.255
4
/
1-0:
10.6.7.255
4
/
1-0:
10.6.8.255
4 / 1-0:1.2.0.255
4 / 1-0:1.2.1.255
4 / 1-0:1.2.2.255
4 / 1-0:1.2.3.255
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
BCD3
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
BCD3
/
1 VA
BCD3
/
1 VA
BCD3
/
1 VA
BCD3
/
1 VA
BCD3
/
1 VA
BCD3
/
1 VA
BCD3
/
1 VA
BCD4
BCD4
BCD4
BCD4
/
/
/
/
1w
1w
1w
1w
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
+CMA4
+CMA5
+CMA6
+CMA7
+CMA8
-CMA
-CMA1
-CMA2
-CMA3
-CMA4
-CMA5
-CMA6
-CMA7
-CMA8
+CMR
+CMR1
+CMR2
+CMR3
+CMR4
+CMR5
+CMR6
+CMR7
+CMR8
-CMR
-CMR1
-CMR2
-CMR3
-CMR4
-CMR5
-CMR6
-CMR7
-CMR8
+CMQ
+CMQ1
+CMQ2
+CMQ3
+CMQ4
+CMQ5
+CMQ6
+CMQ7
+CMQ8
-CMQ
-CMQ1
46 / 129
1.2.4
1.2.5
1.2.6
1.2.7
1.2.8
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
3.2.0
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.2.8
4.2.0
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.8
9.2.0
9.2.1
9.2.2
9.2.3
9.2.4
9.2.5
9.2.6
9.2.7
9.2.8
10.2.0
10.2.1
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
4 / 1-0:1.2.4.255
4 / 1-0:1.2.5.255
4 / 1-0:1.2.6.255
4 / 1-0:1.2.7.255
4 / 1-0:1.2.8.255
4 / 1-0:2.2.0.255
4 / 1-0:2.2.1.255
4 / 1-0:2.2.2.255
4 / 1-0:2.2.3.255
4 / 1-0:2.2.4.255
4 / 1-0:2.2.5.255
4 / 1-0:2.6.2.255
4 / 1-0:2.2.7.255
4 / 1-0:2.2.8.255
4 / 1-0:3.2.0.255
4 / 1-0:3.2.1.255
4 / 1-0:3.2.2.255
4 / 1-0:3.2.3.255
4 / 1-0:3.2.4.255
4 / 1-0:3.2.5.255
4 / 1-0:3.2.6.255
4 / 1-0:3.2.7.255
4 / 1-0:3.2.8.255
4 / 1-0:4.2.0.255
4 / 1-0:4.2.1.255
4 / 1-0:4.2.2.255
4 / 1-0:4.2.3.255
4 / 1-0:4.2.4.255
4 / 1-0:4.2.5.255
4 / 1-0:4.2.6.255
4 / 1-0:4.2.7.255
4 / 1-0:4.2.8.255
4 / 1-0:9.2.0.255
4 / 1-0:9.2.1.255
4 / 1-0:9.2.2.255
4 / 1-0:9.2.3.255
4 / 1-0:9.2.4.255
4 / 1-0:9.2.5.255
4 / 1-0:9.2.6.255
4 / 1-0:9.2.7.255
4 / 1-0:9.2.8.255
4 / 1-0:10.2.0.255
4
/
1-0:
10.2.1.255
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
BCD4
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1w
1var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1 var
1VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
1 VA
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
-CMQ2
10.2.2
/
-CMQ3
10.2.3
/
-CMQ4
10.2.4
/
-CMQ5
10.2.5
/
-CMQ6
10.2.6
/
-CMQ7
10.2.7
/
-CMQ8
10.2.8
/
4
/
10.2.2.255
4
/
10.2.3.255
4
/
10.2.4.255
4
/
10.2.5.255
4
/
10.2.6.255
4
/
10.2.7.255
4
/
10.2.8.255
1-0:
BCD4
/
1 VA
1-0:
BCD4
/
1 VA
1-0:
BCD4
/
1 VA
1-0:
BCD4
/
1 VA
1-0:
BCD4
/
1 VA
1-0:
BCD4
/
1 VA
1-0:
BCD4
/
1 VA
4.5 Real-time clock
There two clock modes for choice: external clock, internal clock of microprocessor.
They have different accuracy, the external clock’s accuracy is less than 0.5s/day in the
range of temperature and the internal clock of microprocessor’s accuracy is less than
0.5s/day when temperature is less than 23 degree.
Users can choose any one of them for use（see details in chapter 1.6）
4.5.1 External firmware clock
Diagram4.5.1.1 Diagram for the connection between RTC and microcontroller
RTC consists of internal crystal oscillator, calendar clock and temperature compensation circuits.
Every second, RTC sends an interruption signal to microcontroller and it interacts with
microcontroller through I2C bus. Microcontroller is able to configure parameters of RTC and read
calendar clock.
The parameters of the external calendar clock are as follows:
 23℃, deviation <=0.1s per day.
 Within the range of normal temperature, the temperature drift <=5ppm, indicating that the
deviation of the meter <=0.5s per day.
47 / 129
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HXT300 Series user manual
4.5.2 Microcontroller
Diagram4.5.2.1 Diagram of internal clock of microcontroller
RTCC is a module integrated within microcontroller. It works with external crystal oscillator
of 32.768 kHz and internally it can correct the initial deviation at normal temperature. Every
second, RTCC sends an interruption signal to microcontroller and microcontroller reads and writes
clock via access of internal register.
The parameters of the internal clock are as follows:
● 23℃, deviation <=0.5s per day.
●Deviation caused by the temperature<=20ppm/℃
4.5.3 Working Details




Gregorian calendar
Automatic leap year switch
Support DST, can choose fixed DST or configure DST. In the mode of fixed DST,
the clock jumps forward from 02:00 standard time to 03:00 DST at the last
Sunday of March every year, whereas the clock jumps backward from 03:00 DST
to 02:00 standard time at the last Sunday of October every year. In the mode of
configurable DST: Users can configure recently 20years DST start time and
finish time.
Support for daylight saving time, the clock shift events will be added into the
events log, the recorded time of events is in accordance with the shifted time.
The sign of S9 will appear on the LCD when entering the daylight saving time.
DST configuration must write figures of DST and then write other
parameters; not allowing to set the parameters from the medium,
otherwise it will not work normally


48 / 129
If DST mode is chosen, but the starting and ending time of DST (daylight saving time)
is not configured, anytime is regarded as standard time.
DST can be enabled or disabled, if meter is in the status of DST, at the same time, DST
function is disabled, meter will automatically deducts one hour and switches into
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual

standard time. If meter is in the status of standard time and DST function is enabled, it
will plus automatically one hour and switches into DST status.
Following time elements are provided:
 Year
（2000~2099）
 Month
（01 ~ 12）
 Calendar day
（01 ~ 31）
 Weekdays
（01 ~ 07）1…7, where 1=Monday, 2=Tuesday, etc.
 Hours
（00 ~ 23）
 Minutes
（00 ~ 59）
 Seconds
（00 ~ 59）
4.5.4 Display and readout of real-time clock
Display and readout of real-time clock as the table 4.4.4.1 as below.
Tab4.5.4.1 Display format of real time clock
Data
Item
Date
Clock
OBIS
Display format
0.9.2
0.9.1
MM:DD:YY
HH:MM :SS
Read-write clock
The time of clock can be read and configured via communication
ports and it should be configured with DST status,
otherwise the meter might switch to DST automatically and
a DST switch event would be added into the event log.
For example: the current time is:
Standard time: 13:00pm, July 24th, 2010
DST:
14:00pm, July 24th, 2010
The following situations that may occur when the clock is overwritten:
(1) Written with: 14:00pm, 24th of July, 2010, DST.
The adjusted time will be: 14:00pm, 24th of July, 2010, DST. No event is recorded
(2) Written with: 15:00pm, 24th of July, 2010, Standard time
The adjusted time will be: 15:00pm, 24th of July, 2010, DST. DST switch event is
recorded.
(3) Written with: 13:00pm, 24th of July, 2010, Standard time
The adjusted time will be: 14:00pm, 24th of July, 2010, DST. DST switch event is
recorded.
(4) Written with: 13:00pm, 24th of July, 2010, DST
The adjusted time will be: 13:00pm, 24th of July, 2010, DST. No event is recorded.
It’s required to write the clock according the first method, because others may lead to
mistakes.
49 / 129
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
It’s required to write the clock according the first method, because
others may lead to mistakes.
4.5.5 Limitation of clock reset
The meter has limitation for clock reset. The limitation time could be configured and the
default time is 60s. When the difference between the reset time (standard time) and current time
(standard time) exceeds the limitation, meter clock will be considered as fault. The invalid rest
signal and exceeds limitation signal will be displayed.
1． The clock should be operated in DST mode in order to
guarantee the correctness
2． When the DST is forbidden, the written DST sign is invalid, the
default is standard time.
4.6 Tariff
4.6.1 Tariff judgment
Diagram4.6.1.1 tariff judgment structure
Inputs
Outputs
Current date and time.
Corresponding tariff number (1-8)
Exception day table
50 / 129
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Exception days table is formed by item, date, and corresponding day
table ID. The meter compares the date with the entries in the
exception days table. If the date is included in the table, it is an
exception day. The season table and week table will be skipped, the
day table ID will be directly used.
Exception days are divided to two classes: appointed exception days
and public exception days.
Appointed exception days are valid in appointed years and public
exceptions are valid in every year.
The exception day table can contain up to 100 entries.
Season table
The season table contains season name, valid beginning date and
week name. Meter determines whether the current date is belong to
the season table. If it is, the corresponding week table name will be
obtained.
Just valid beginning time is available in the season table. If the
current date is between two valid beginning dates, it will be judged as
belong to the former season.
For example:
Spring
1st, March
Summer
1st, June
Autumn
1st, September
Winter
1st, December
If the current date is 1st, May, it will be judged belonging to Spring.
Up to 10 season tables could be set.
Week table
The week table defines the type of day valid in each case in lines for
each day from Monday to Sunday. The week table name and day
table ID form the week table. The meter compares the current date
with the corresponding week table and then gets the day table ID.
Up to 10 week tables could be set.
Day table
The day table contains time (hour and minute) and tariff No. The
meter compares the current time with the day table ID to get current
tariff No.
Up to 10 day table could be set.
The day table could contain up to 10 entries.
4.6.2 Tariff table update
A passive calendar could be set with valid time. When the valid time comes, he
passive calendar will be activated and replace the former calendar.
51 / 129
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HXT300 Series user manual
Diagram4.6.2.1 Block schematic before the passive tariff table is activated




52 / 129
If the valid time of the passive calendar is before current time,
the passive calendar will be activated immediately after being
set.
If the power grid is powered off leading the current time skips
the valid time of passive calendar, the passive calendar will be
activated immediately when power is on.
After the passive calendar is activated, the former passive
calendar and activation time will be stored. But the mark of “To
be activated” in meter will be cleared and the passive calendar
will not be activated again.
An event of activation will be added to the event log after the
activation of passive tariff table.
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Diagram4.6.2.2 Block schematic after the passive tariff table is activated
4.6.3 Attentions of tariff table configuration
The principles should be complied with when setting tariff table:
 Main tariff table names should be firstly written before the
configurations of main tariff table. Then will be the remained
parameters.
 Passive tariff table names should be firstly written before the
configurations of passive tariff table. Then will be the remained
parameters.
 Numbers of public holiday should be firstly written before the
configuration of public holiday table. Then will write the accordingly
holiday parameters.
 Each of the public holidays, main tariff table and passive tariff table
should be revised; it needs complete modification of all. It is not
53 / 129
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual

allowing any modification of medium parameters or parts of
parameters. Otherwise, it will lead to the entire meter’s deadly error!
After all the complete sets of the passive tariff meters will be allowed
to set the valid time.
4.7 LCD Display
4.7.1 Introduction
Meter has a LCD display with following size and layout:
Diagram4.7.1.1 Size and layout of LCD
Diagram4. 7.1.2 Size of each digit
Diagram4. 7.1.3 Diagram of view angle


Meter has a clear visibility with a range of view angle of 45°right down the LCD
within one meter.
The display is provided with background lighting for easy reading
OBIS：
54 / 129
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
When the meter displays import active energy, the

current display will be 1.8.0 . Letters are right aligned.
Current tariff No.
If Tariff 1 is the current tariff, the display will be T1.

Communication indicator
If the meter is using optical communication or the up-link is reading the

meter, the communication indicator will flash with a frequency of 1Hz.
Voltage indicator

These indicators show the status of voltage and stands for
Phase A, Phase B and Phase C respectively. When voltage is normal, these
indicators are displayed normally. When the voltage is unusual, such as
undervoltage or overvoltage, these indicators will flash. If the current voltage is
lower than the rated voltage by 20%, these indicators will not be displayed.
Power direction indicator
The arrow is right when the meter imports energy from power network.

The arrow is left when the meter exports energy to power network. If there is no
current, the indicator will not be showed. If the current voltage is lower than the
rated voltage by 20%, the indicator also will not be displayed.
Battery condition
The indicator will flash with 1Hz frequency when the voltage of battery

is low or battery life is almost over. The flash will disappear after the battery is
replaced. The battery replacement process could be seen in 4.16.4.
GPRS Signal indicates:
Indicates the current GPRS with strong signal, will not display
when power off
： RSSI < -99 dBm Indicates the current without signal(check the installation
instructions for remote communication module, if without flag, means current
meter not installed a remote communication module or remote module is not
proper installed )
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
：-99dBm <= RSSI < -95dBm, Indicates the signal is weak
：-95 dBm <= RSSI < -85 dBm, indicates the current signal is common
： -85 dBm <= RSSI < -79dBn, indicates the current signal is good
： -79dBn <= RSSI, indicates the current signal is very good
Data:
Disconnector status
The indicator shows the current physical
status of disconnector.
Unit field
Quadrant indicator
Different units can be shown: kWh, Hz, etc.
This indicator indicates the work quadrant of three phase.
The work quadrant is judged according to the active algebraic sum
and reactive algebraic sum of
Other indicators
S1
S2
S3
S4
S5
S6
S7
S8
S9
 S1： It flashes after meter cover has been open.
 S2： It flashed in button display mode or ALT display mode
 S3： It flashed in TEST display mode（In factory mode display meter
cover open）
 S4： It flashed in use auxiliary power supply（In factory mode display
meter terminal open）
 S5：
 S6：The disconnector could be connected by pressing button manually.
 S7： Meter cover is open now or there is magnetic field which is over
0.5mT or inverse phase sequence happens.
 S8： EOI indicate output
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HXT300 Series user manual

S9： The meter is in DST
4.7.2 Display mode and operate
Diagram4.7.2.1 Diagram of switching display mode








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The meter supports for five display modes: automatic rotated display, button
display, test display, no display and power off display.
Rotated time and rotated item of automatic rotated display table and button
display items of button display table could be configured.
Up to 60 display items could be set in rotated display table and button display
table.Display item and format see chapter 4.7.3
When meter is power off, no display will be performed, meter switches to no
display mode.
In the no display mode, pressing the button will enter into power-off display (the
location of button refers to 3.1 Structure.) In the power-off mode, it will use button
table for normal operation. And if it is more than 20s not pressing button, it will
automatically switch to the no display mode. And in the condition of power-off, no
test display mode.
The full display will last 3 seconds, then go into the automatical rotated display.
Automatic rotated display is the default display mode and it could be switched to
button display mode through push button in 2s. The meter will display from the
first button display item and these button display items also could be switched
through pressing button in 2s.
The button display mode will be switched to rotated display mode automatically if
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual


the button is not operated over 2 minutes. And the meter will display from the first
rotated display item.
In the case of button display mode, press the button 2 seconds and enter into
test display mode, the meter will display from the first the rotated display item,
the LCD will have a S3 sign in the test display mode.
The test display mode will be switched to rotated display mode automatically if
the button is not operated over 2 minutes. And the meter will display from the first
rotated display item.
If having backlighted and the current set is button display, the backlight will be
operated. And if back to automatical scrolling display, the backlight will be
closed
Diagram4.7.2.2 LCD backlight

When meter is power off, no display will be performed, meter switches to no
display mode.
4.7.3 Display item and display format
Display item and format as drawing 4.7.3.1.
1． The display digit and decimal can be configured according to
the users needs, for example 7 digits +1 decimal; 6 digits +1
decimal; 6 digits +2 decimals
2． Whether the Energy consumption high level 0 should be
displayed can be set according to users habits.。
Tab4.7.3.1 Display item and format
Display
OBIS
Display Item
Display Format
Example
15.8.0
Total active energy
xxxxxx.xx kWh
000000.00 kWh
15.8.x
Total active energy of tariff 1
xxxxxx.xx kWh
000000.00 kWh
1.8.0
Total active energy of tariff 2
xxxxxx.xx kWh
000000.00 kWh
1.8.x
Total active energy of tariff 3
xxxxxx.xx kWh
000000.00 kWh
2.8.0
Total active energy of tariff 4
xxxxxx.xx kWh
000000.00 kWh
2.8.x
Total forward active energy
xxxxxx.xx kWh
000000.00 kWh
3.8.0
Forward active energy of tariff 1
xxxxxx.xx kvarh
000000.00 kvarh
3.8.x
Forward active energy of tariff 2
xxxxxx.xx kvarh
000000.00 kvarh
4.8.0
Forward active energy of tariff 3
xxxxxx.xx kvarh
000000.00 kvarh
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HXT300 Series user manual
4.8.x
Forward active energy of tariff 4
xxxxxx.xx kvarh
000000.00 kvarh
9.8.0
Total reverse active energy
xxxxxx.xx kVAh
000000.00 kVAh
9.8.x
Reverse active energy of tariff 1
xxxxxx.xx kVAh
000000.00 kVAh
10.8.0
Reverse active energy of tariff 2
xxxxxx.xx kVAh
000000.00 kVAh
10.8.x
Reverse active energy of tariff 3
xxxxxx.xx kVAh
000000.00 kVAh
5.8.0
Reverse active energy of tariff 4
xxxxxx.xx kvarh
000000.00 kvarh
5.8.x
Total forward reactive energy
xxxxxx.xx kvarh
000000.00 kvarh
6.8.0
Forward reactive energy of tariff
1
xxxxxx.xx kvarh
000000.00 kvarh
6.8.x
Forward reactive energy of tariff
2
xxxxxx.xx kvarh
000000.00 kvarh
7.8.0
Forward reactive energy of tariff
3
xxxxxx.xx kvarh
000000.00 kvarh
7.8.x
Forward reactive energy of tariff
4
xxxxxx.xx kvarh
000000.00 kvarh
8.8.0
Total reverse reactive energy
xxxxxx.xx kvarh
000000.00 kvarh
8.8.x
Reverse reactive energy of tariff
xxxxxx.xx kvarh
000000.00 kvarh
Reverse reactive energy of tariff
xxxxx.xxx kW
0.000 kW
Reverse reactive energy of tariff
Mmdd.hh:mm
0304.08:30
Reverse reactive energy of tariff
xxxxx.xxx kW
0.000 kW
1.6.x
Total forward apparent energy
Mmdd.hh:mm
0304.08:30
2.6.0
Forward apparent energy of tariff
1
xxxxx.xxx kW
0.000 kW
2.6.0
Forward apparent energy of tariff
2
Mmdd.hh:mm
0304.08:30
2.6.x
Forward apparent energy of tariff
3
xxxxx.xxx kW
0.000 kW
2.6.x
Forward apparent energy of tariff
4
Mmdd.hh:mm
0304.08:30
3.6.0
Total reverse apparent energy
xxxxx.xxx kvar
0.000 kvar
3.6.0
Reverse apparent energy of tariff
1
Mmdd.hh:mm
0304.08:30
3.6.x
Reverse apparent energy of tariff
2
xxxxx.xxx kvar
0.000 kvar
3.6.x
Reverse apparent energy of tariff
3
Mmdd.hh:mm
0304.08:30
4.6.0
Reverse apparent energy of tariff
4
xxxxx.xxx kvar
0.000 kvar
4.6.0
Total I quadrant reactive energy
Mmdd.hh:mm
0304.08:30
1
1.6.0
2
1.6.0
3
1.6.x
4
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HXT300 Series user manual
4.6.x
I quadrant reactive energy of
tariff 1
xxxxx.xxx kvar
0.000 kvar
4.6.x
I quadrant reactive energy of
tariff 2
Mmdd.hh:mm
0304.08:30
9.6.0
I quadrant reactive energy of
tariff 3
xxxxx.xxx kVA
0.000 kVA
9.6.0
I quadrant reactive energy of
tariff 4
Mmdd.hh:mm
0304.08:30
9.6.x
Total II quadrant reactive energy
xxxxx.xxx kVA
0.000 kVA
9.6.x
II quadrant reactive energy of
tariff 1
Mmdd.hh:mm
0304.08:30
10.6.0
II quadrant reactive energy of
tariff 2
xxxxx.xxx kVA
0.000 kVA
10.6.0
II quadrant reactive energy of
tariff 3
Mmdd.hh:mm
0304.08:30
10.6.x
II quadrant reactive energy of
tariff 4
xxxxx.xxx kVA
0.000 kVA
10.6.x
Total III quadrant reactive energy
Mmdd.hh:mm
0304.08:30
32.7.0
III quadrant reactive energy of
tariff 1
xxx.xx V
230.00 V
52.7.0
III quadrant reactive energy of
tariff 2
xxx.xx V
230.00 V
72.7.0
III quadrant reactive energy of
tariff 3
xxx.xx V
230.00 V
31.7.0
III quadrant reactive energy of
tariff 4
xxxxxx.xx A
10.00 A
51.7.0
Total IV quadrant reactive energy
xxxxxx.xx A
10.00 A
71.7.0
IV quadrant reactive energy of
tariff 1
xxxxxx.xx A
10.00 A
21.7.0
IV quadrant reactive energy of
tariff 2
xxxx.xxxx kW
2.3000 kW
41.7.0
IV quadrant reactive energy of
tariff 3
xxxx.xxxx kW
2.3000 kW
61.7.0
IV quadrant reactive energy of
tariff 4
xxxx.xxxx kW
2.3000 kW
22.7.0
Forward active M.D.
xxxx.xxxx kW
2.3000 kW
42.7.0
Forward active M.D.occurrence
time
xxxx.xxxx kW
2.3000 kW
62.7.0
Forward active M.D.of tariff 1
xxxx.xxxx kW
2.3000 kW
23.7.0
Forward active M.D.occurrence
time of tariff 1
xxxx.xxxx kvar
2.3000 kvar
43.7.0
Forward active M.D.of tariff 2
xxxx.xxxx kvar
2.3000 kvar
63.7.0
Forward active M.D.occurrence
xxxx.xxxx kvar
2.3000 kvar
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
time of tariff 2
24.7.0
Forward active M.D.of tariff 3
xxxx.xxxx kvar
2.3000 kvar
44.7.0
Forward active M.D.occurrence
time of tariff 3
xxxx.xxxx kvar
2.3000 kvar
64.7.0
Forward active M.D.of tariff 4
xxxx.xxxx kvar
2.3000 kvar
29.7.0
Forward active M.D.occurrence
time of tariff 4
xxxx.xxxx kVA
2.3000 kVA
49.7.0
Reverse active M.D.
xxxx.xxxx kVA
2.3000 kVA
69.7.0
Reverse active M.D.occurrence
time
xxxx.xxxx kVA
2.3000 kVA
33.7.0
Reverse active M.D.of tariff 1
x.xxx
1.000
53.7.0
Reverse active M.D.occurrence
time of tariff 1
x.xxx
1.000
73.7.0
Reverse active M.D.of tariff 2
x.xxx
1.000
13.7.0
Reverse active M.D.occurrence
time of tariff 2
x.xxx
1.000
1.7.0
Reverse active M.D.of tariff 3
xxxx.xxxx kW
2.3000 kW
2.7.0
Reverse active M.D.occurrence
time of tariff 3
xxxx.xxxx kW
2.3000 kW
3.7.0
Reverse active M.D.of tariff 4
xxxx.xxxx kvar
2.3000 kvar
4.7.0
Reverse active M.D.occurrence
time of tariff 4
xxxx.xxxx kvar
2.3000 kvar
14.7.0
Forward reactive M.D.
xx.xx Hz
50.00Hz
0.9.1
Forward reactive M.D.occurrence
time
hh:mm:ss
14 : 23: 10
0.9.2
Forward reactive M.D.of tariff 1
mm-dd-yy
08-08-12
C.6.1
Forward reactive M.D.occurrence
time of tariff 1
x.xx
0.99
C.6.3
Forward reactive M.D.of tariff 2
x.x V
3.5 V
C.13.1
Forward reactive M.D.occurrence
time of tariff 2
xxxxxxxx
12345678
97.97.0
Forward reactive M.D.of tariff 3
xxxxxxxx
00000000
C.1.0
Forward reactive M.D.occurrence
time of tariff 3
xxxxxxxx
10023416
17.0.0
Forward reactive M.D.of tariff 4
xx.xx A
80.00A
96.3.10
Forward reactive M.D.occurrence
time of tariff 4
xx
6
32.37.0
Reverse reactive M.D.
xxxxx
1
52.37.0
Reverse
reactive
occurrence time
xxxxx
1
72.37.0
Reverse reactive M.D.of tariff 1
xxxxx
1
C.7.21
Reverse
reactive
occurrence time of tariff 1
xxxxx
1
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M.D.
M.D.
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
C.7.9
Reverse reactive M.D.of tariff 2
xxxxx
1
C1.84
Reverse
reactive
occurrence time of tariff 2
xx:xx
02:22
1.14.0
Reverse reactive M.D.of tariff 3
xxxxx.xxx kW
0.000 kW
0.4.2
Reverse
reactive
occurrence time of tariff 3
xxxx.xxA
1.00A
0.4.5
Reverse reactive M.D.of tariff 4
xxxx.xxA
1.00A
0.4.3
Reverse
reactive
occurrence time of tariff 4
xxxx.xxV
1.00V
0.4.6
Forward apparent M.D.
xxxx.xxV
1.00V
M.D.
M.D.
M.D.
Forward apparent M.D.
occurrence date
1.8.0.1
Forward apparent M.D.of tariff 1
xxxxxx.xx kWh
000000.00 kWh
1.8.x.1
Forward apparent M.D.
occurrence date of tariff 1
xxxxxx.xx kWh
000000.00 kWh
3.8.0.1
Forward apparent M.D.of tariff 2
xxxxxx.xx kvarh
000000.00 kvarh
3.8.x.1
Forward apparent M.D.
occurrence time of tariff 2
xxxxxx.xx kvarh
000000.00 kvarh
1.8.0.2
Forward apparent M.D.of tariff 3
xxxxxx.xx kWh
000000.00 kWh
1.8.x.2
Forward apparent M.D.
occurrence date of tariff 3
xxxxxx.xx kWh
000000.00 kWh
3.8.0.2
Forward apparent M.D.of tariff 4
xxxxxx.xx kvarh
000000.00 kvarh
3.8.x.2
Forward apparent M.D.
occurrence date of tariff 4
xxxxxx.xx kvarh
000000.00 kvarh
1.6.0.1
Reverse apparent M.D.
xxxxx.xxx kW
0.000 kW
1.4.0.1
Reverse apparent M.D.
occurrence time
Mmdd.hh:mm
0304.08:30
1.6.x.1
Reverse apparent M.D. of tariff 1
xxxxx.xxx kW
0.000 kW
1.4.x.1
Reverse apparent M.D.
occurrence time of tariff 1
Mmdd.hh:mm
0304.08:30
13.15.0.1
Reverse apparent M.D. of tariff 2
x.xxx
1.000
13.15.x.1
Reverse apparent M.D.
occurrence time of tariff 2
x.xxx
1.000
13.0.0
Reverse apparent M.D. of tariff 3
xxxxxx
000EE1
C.9.0
Reverse apparent M.D.
occurrence time of tariff 3
xx.xx
23.56
Reverse apparent M.D. of tariff 4
Reverse apparent M.D.
occurrence time of tariff 4
Voltage of phase A
Voltage of phase B
Voltage of phase C
Current of phase A
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Current of phase B
Current of phase C
Forward active power of phase A
Forward active power of phase B
Forward active power of phase C
Reverse active power of phase A
Reverse active power of phase B
Reverse active power of phase C
Forward reactive power of phase
A
Forward reactive power of phase
B
Forward reactive power of phase
C
Reverse reactive power of phase
A
Reverse reactive power of phase
B
Reverse reactive power of phase
C
Apparent power of phase A
Apparent power of phase B
Apparent power of phase C
Power factor of phaseA
Power factor of phaseB
Power factor of phase C
Three phase total power factor
Three phase total forward active
power
Three phase total reverse active
power
Three phase total forward
reactive power
Three phase total reverse active
power
Frequency
Time
date
Current battery remained energy
Current battery voltage
Standard information
Failed register
E-meter serial number
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Threshold of current flow
Reason of relay disconnection
Times of reverse current of
phase A
Times of reverse current of
phase B
Times of reverse current of
phase C
Occurrence of short power off
Occurrence of long power off
Remained time interval
Current forward active interval
demand
Total forward active energy in last
month
Forward active energy of tariff 1
in last month
Forward active energy of tariff 2
in last month
Forward active energy of tariff 3
in last month
Forward active energy of tariff 4
in last month
Forward reactive energy in last
month
Total forward reactive energy of
tariff 1 in last month
Total forward reactive energy of
tariff 2 in last month
Total forward reactive energy of
tariff 3 in last month
Total forward reactive energy of
tariff 4 in last month
Forward active energy in last two
months
Forward active energy of tariff 1
in last two months
Forward active energy of tariff 2
in last two months
Forward active energy of tariff 3
in last two months
Forward active energy of tariff 4
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
in last two months
Forward reactive energy in last
two months
Forward reactive energy of tariff
1 in last two months
Forward reactive energy of tariff
2 in last two months
Forward reactive energy of tariff
3 in last two months
Forward reactive energy of tariff
4 in last two months
Forward active M.D. in last
month
Forward active M.D. occurrence
time in last month
Forward active M.D. of tariff 1 in
last month
Forward active M.D. occurrence
time of tariff 1 in last month
Forward active M.D. of tariff 2 in
last month
Forward active M.D. occurrence
time of tariff 2 in last month
Forward active M.D. of tariff 3 in
last month
Forward active M.D. occurrence
time of tariff 3 in last month
Forward active M.D. of tariff 4 in
last month
Forward active M.D. occurrence
time of tariff 4 in last month
Average power factor in last
month
Average power factor of tariff 1in
last month
Average power factor tariff 2 in
last month
Average power factor tariff 3 in
last month
Average power factor tariff 4 in
last month
Current tariff table name
MAC address of PLC module
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
MAC address of concentrator
Full interface
4.8 Monitoring function
The meter can monitor the quality of power grid
4.8.1 Power-off monitoring
event name
power-off in short time
event
definition
When all the work voltages Uabc about different phase are inferior to the
threshold level of Udd and the sustained time of power-off is not inferior to
the Tdd, it is called the power-off in long time, otherwise, power-off in short
time.
checking
premise
Power grid being normal( at least one phase voltage exceeds the
threshold of power-off.)
starting
conditions
power grid being power-off(all the work voltages about different phase
are inferior to the threshold level, Uabc<Udd)
ending
condition
Power grid being normal ( at least one phase voltage exceeds the
threshold of power-off.)
event
parameter
the threshold of power-off Udd=46V
Delay time Tdd, default value is 180 seconds,
recording
content
-
-
power-off in long time
configurable(3~65535)
The times of power grid being power-off in short time.
The times of power grid being power-off in long time.
the time of power grid being power-off, total forward active energy
register of phase 3 when power grid is power-off.(referring to 4.10.10
chapter)
Ending time of power grid being power-off (referring to 4.10.4
chapter)
The ending time and sustaining period of power grid being power-off
long time about near 20 time.(referring to 4.10.5)
4.8.2 Overvoltage and under-voltage monitoring
event name
overvoltage
event
definition
Some phase voltage Ux exceed the threshold of Ugd, at the same time,
sustaining time reaches the delaying time of event.
checking
precision
Power grid is normal, and this phase is not the status of loss of this
phase.(referring to 4.8.3)
starting
condition
Ux>Ugg, and the sustaining time reaches Td.
ending time
Ux ≤ Ugd, the sustaining time reaches Td
2Loss of this phase will end timely
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3. Power grid being power-off will end timely
event
parameter
The threshold of overvoltage Ugd, defaulted 110% Un, configurable
(105%~200%). In the application, because the range of work voltage of
meter is wider, and the threshold of overvoltage sets voltage value
directly, rather than the proportional relation, configurable between
46V-480V.
The delaying time Td, defaulted 10s, configurable(3~65535)
recording
content
-
event name
Under-voltage
event
definition
Some phase voltage Ux is inferior to the threshold of Ugd, at the same
time, sustaining time reaches the delaying time of event.
checking
premise
Power grid is normal, and this phase is not the status of loss of this
phase.(referring to 4.8.3)
starting time
Ux<Ugd, and the sustaining time reaches Td.
ending time
1．Ux≥Ugd, the sustaining time reaches Td
2.
3.
the starting time of overvoltage
the ending time of overvoltage
The highest voltage value in this process
Loss of this phase will end timely
Power grid being power-off will end timely
event
parameter
The threshold of under-voltage Ugd, defaulted 90% Un, configurable
(60%~95%). In the application, because the range of work voltage of
meter is wider, and the threshold of under-voltage sets voltage value
directly, rather than the proportional relation, configurable between
46V-480V.
Delaying time Td, defaulted 10s, configurable(3~65535).
recording
content
starting time of under-voltage
ending time of under-voltage
Minimum voltage value of the process of under-voltage(referring to
4.10.12)
4.8.3 Loss of phase monitoring
event name
loss of phase
event
definition
Power grid is normal( under the circumstance of at least one phase
voltage exceeding the threshold of power grid being power-off, voltage of
some phase is inferior to the threshold of loss of phase UDX and current
of this phase Ix does not exceed the is tart of starting current, at the same
time, sustaining time reaches the delaying time Td.
checking
premise
The power grid being normal( at least one phase voltage exceeds the
threshold of power grid being power-off)
starting
condition
（Ux<Udx and Ix≤Istart），and sustaining time reaches Td
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Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
ending
condition
1 (Ux≥Udx or Ix>Istart), and sustaining time reaches Td
2. The power grid being power-off will end timely
event
parameter
the threshold of loss of phase Udx=46V
Delaying time Td, defaulted 10s, configurable(3~65535)
recording
content
-
starting time of loss of phase
Ending time of loss of phase(referring to 4.10.4 chapter)
4.8.4 Current unbalanced monitoring
event name
current unbalanced
event
definition
Maximum phase current Iabc_max exceeds 5% in the different phases,
current unbalanced rate( maximum phase current Iabc max – minimum
phase current Iabc min)/maximum phase Iabc max) exceeds the threshold
of X of voltage unbalanced rate, at the same time, sustaining time
reaches the delaying time Td.
checking
premise
Power grid is normal.
starting
condition
（（ Iabc_max-Iabc_min ） /Iabc_max ） > X, and Iabc_max> 5%Ib, sustaining time
reaches Td
ending
condition
1( （（ Iabc_max-Iabc_min ） /Iabc_max ） ≤ X ， 或 Iabc_max≤5%Ib) and
sustaining time reaches Td
2. Power grid being power-off will end timely
event
parameter
Delaying time Td, defaulted 10s, configurable(3~65535)
The threshold of X of current unbalanced, defaulted 30%, configurable
(20%~100%)
recording
content
-
starting time of current unbalanced
The ending time of current unbalanced (referring to 4.10.4)
4.8.5 Loss of current monitoring
event name
loss of current
event
definition
When maximum current Iabc max is not inferior to 5% Ib in the different
phase, some phase current is inferior to starting current Istart, at the
same time, sustaining time reaches the delaying time Td of event.
checking
premise
Power grid is normal, and this phase is not the status of loss of
phase.(referring to 4.8.3 chapter)
starting
condition
（Iabc_max≥5%Ib and Ix<Istart），and sustaining time reaches Td.
ending
condition
1 (Iabc_max<5%Ib 或 Ix≥Istart), and sustaining time reaches Td
event
parameter
Delaying time Td, defaulted 10s, configurable(3~65535)
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2. Power grid being power-off will end timely
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
recording
content
stating time of loss of current
to 4.10.4 chapter)
stating time of loss of current(referring
4.8.6 By-pass monitoring
event name
by-pass
event
definition
When maximum Ix max exceeds 5% in the different current, D-value
between the maximum value In max and minimum exceeds 16% In max
in minatrual vector sum current and natural sample, and sustaining time
reaches Td.
checking
premise
Power grid is normal
starting
condition
（Ix_max > 5%Imax and (In_max-In_min) >16%In_max, sustaining time
ending
condition
1．
（Ix_max ≤ 5%Imax or (In_max-In_min) ≤ 16%In_max）, sustaining time
reaches Td
2. 。Power grid being power –off will end timely
event
parameter
Delaying time Td. Defaulted 10s, configurable(3~65535)
recording
content
-
reaches Td
stating time of by-pass
ending time of by-pass(referring to 4.10.4)
Register of total phase3 forward active energy and phase 3 voltage,
phase 3 current(referring to 4.10.15)
By-pass checking function only exists in the 3 phase 4 wires
current metering meter with natural line(referring to 1.6)
4.8.7 Voltage unbalanced monitoring
event name
voltage unbalanced
event
definition
In the voltage of different phase, voltage unbalanced rate((maximum
phase voltage Vabc max –minimum ohase voltage Vabc min)/ maximum
phase voltage Vabc max) exceeds the threshold Y of voltage unbalanced
rate, at the same time, sustaining time reaches the delaying time Td of
event.
checking
premise
Power grid is normal
starting
condition
（（Vabc_max-Vabc_min）/Vabc_max）> Y, and sustaining time reaches
Td
ending
condition
1．（（Vabc_max-Vabc_min）/Vabc_max）≤ Y， sustaining time reaches
event
parameter
Delaying time Td, defaulted 10s, configurable(3~65535)
The thrashold Y of voltage unbalanced, defaulted
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Td
2. Power grid being power will end timely
30%,
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HXT300 Series user manual
configurable(20%~100%)
recording
content
-
stating time of voltage unbalanced
）ending time of voltage unbalanced(referring to 4.10.4)
4.9 Disconnector control
This function modules exist in the meter with relay(referring to
chapter1.6 )
4.9.1 Physical characteristics
4.9.1.1 Magnetic latching relay in route one

Normally open or normally closed nodes








the largest connection resistance：100mΩ
the largest voltage：250VAC
the largest current：1A
the largest power：250VA
mechanical life：500000times
electric life：100000times
the largest short circuit current：500A/10ms
proof pressure between connection terminal of relay and other parts of meter：
4000VAC 50/60Hz(1Min)
proof pressure between connection terminal：750VAC 50/60Hz(1Min)
insulation resistance between connection terminal：100MΩ


Min.(500VDC)
Drawing.4.9.1.1.1 Magnetic keeping relay to control the load connection diagram
Due to the electric meter relay being normally open or normally closed nodes,it usually
connects external relay. When the relay is normally closed within meters, it will give external
relay control terminal to plus voltage and drive external relay closed; when the electric meter
relay inside is normally open, there is no voltage on external relay control terminals and
external relay automatically disconnect.
This control method is usually used to control a device in occasions, such as water heater,
big air conditioning, etc. it can help electric power company shut off the power of large
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HXT300 Series user manual
equipment when the power load is overweight, in order to achieve the balance of power.
External relay usually has more specifications for 20A, 40A, 60 A.
This also can be open for customer and provide open and close service of this
equipment.
4.9.1.2 Dry-reed Relay

Pulse control node








The largest contact resistance：100mΩ


Largest voltage：300VAC/150VDC
the largest current：1A
the largest power：240VA/30W
mechanical life：1000000 times
Electric gas life：100000 times
the largest short circuit current：500A/10ms
proof pressure between connection terminal of relay and other parts of meter：
500VAC 50/60Hz(1Min)
proof pressure between connection terminal ：500VAC 50/60Hz(1Min)
insulation resistance between connection terminal ：1000MΩ
Min.(500VDC)
Diagram.4.9.1.2.1 Dry-reed relay load control connetion
Due to the electric meter relay being pulse control mode, it usually connects the external
circuit breaker. when the meter drives closure with reed relay and output pulse, closing control
terminals of external circuit breaker plus pulse voltage and drive the external circuit breaker
closed; When the meter drives disconnect a reed relay and output pulse, it gives the
disconnect control terminal of the external circuit breaker pulse to plus voltage and drive the
external circuit breakers to disconnect
This control method controls user power transformers in the large users, area transformer. The
external circuit breaker is usually 150A, 200A, 400 A etc.
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4.9.2 Control logic
Diagram4.9.2.1 Diagram of disconnector control logic
Control status:
There are four control status: disconnected（0）、connected（1）、ready for connected
with lock（2）、ready for connected(3)
 disconnected（0）: In this status, the disconnector is disconnected.
The disconnector only could be connected unless the central
system or the PC software issues connect command or the set
connection time comes.
 connected(1):The disconnector is connected in this status.
 Ready for connected with lock (2):The disconnector is
disconnected in the status and will not be connected
automatically.
 Ready for connected (3):The disconnector is disconnected in the
status and will be connected after overload ends.



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The disconnector will be switched to disconnected (0) when the
central system issue the (a) remote disconnect command no
matter which status the disconnector is in.
(b) disconnect time over will be executed and the disconnector
status is switched to disconnected(0) when the set disconnect
time in meter comes no matter which status the meter is in.
(c) or (h) will be executed according to the current control status
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual








when the central system issues (c) remote connect command.
(d) or (i) will be executed according to the current control status
when the set connection times in meter comes.
If the overload exceeds control threshold when the disconnector
is in Connected (1), (f) overload disconnect will be executed and
the disconnector will be switched to Ready for connected(3).
When the disconnector is in Ready for connected(2) or Ready for
connected(3), it will be switched to Connected(1) by executing (e)
Manual reconnect.
When the disconnector is in Ready for connected(3), it could be
switched to Connected(1) executing（k）auto reconnect.
In normal status, the disconnector will be disconnected after
overload happens several times. (j)N overtime will be executed
and the disconnector is switched to Ready for connect with lock
(2). The disconnection times will be cleared and the overload will
be judged after disconnector is connected.
In emergency status, the disconnector will be disconnected after
overload happens several times. (i)E overtime will be executed
and the disconnector is switched to Ready for connect with lock
(2) and E overtime flag is set . The disconnection times will be
cleared and the overload will be judged after disconnector is
connected.
When the emergency status is switched to normal status and the
current status of disconnector is Ready for connect with lock (2)
with E overtime flag, (m)E to N will be executed and the
disconnector status will be switched to Connected(1).
If the working mode allows, the disconnector could be switched to
ready for connected with lock(2) by pushing the button for 3
seconds executing（g）Manual disconnect.
Control mode
There are four control modes
Mode 0 No operation is available in the mode.
Mode 1 Available operation: a / b / c / d / e / f / g / j/ k / l / m / n/ o/ p/ q/ r
Mode 2 Available operation: a / b / e / f / g / h / i / j/ k / l / m / n/ o/ p/ q/ r
Mode 3 Available operation: a / b / c / d / e / f / j/ k / l / m / n/ o/ p/ q/ r
Mode 4 Available operation: a / b / e / f / h / i / j/ k / l / m / n/ o/ p/ q/ r
The power supply company could choose one mode and switch working mode.
Overload judgment:
If the current apparent power of power grid exceeds the threshold active, the value of
Roverload (a register used for judging the overcurrent) will increase by 1 from 0 per
second, while the current falls below the threshold, it will reduce by 1 to 0 similarly. If the
Roverload exceeds the overcurrent delay period(1s~65535s).The overcurrent event will
occur and the disconnector will be disconnected.
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After the operation of the disconnector (disconnection or connection), the Roverload will
be cleared and another monitor will start.
After the disconnector is disconnected, the overload judgment is stopped.
When the disconnector is reconnected, the Roverload is reset and begin to judge
overload.
Diagram4.9.2.2 Overload judgment
An emergency time table is assigned in the meter. If the current time is in the emergency
time table, the Threshold active threshold will be switched to emergency threshold active
immediately. For example, in the Fig. 4.9.2.2, the meter works at the emergency threshold
active during the interval from T0 to T1. After the time point of T1, the meter works at
normal threshold active at once.
Power off and power on（configurable）
The disconnector will disconnect automatically when the grid is power off in non-power
guarantee mode. The disconnector will connect 15 seconds later after the grid is power
on.
Default to the control logic. you also can choose to use timing
control mode, the user can use a similar rate table (see section
4.6 ) and set the timing control state of the relay in the setting
way.
4.9.3 Physical status detection
Relay not support physical status detection, display state same as relay control state
4.9.4 Malfunction judgment and handling
Can not for malfunction judgment, only judg by manual work according to external
power use situation
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4.9.5 Reasons of disconnecting disconnector
The meter provides a register to indicate the reason of disconnecting the disconnector.
Reason
00 The disconnetor is disconnected because the power is off
01 The meter receives the command to disconnect the disconnector.
02 The set time for disconnecting the disconnector is over.
03 The meter is overload.
06 The disconnector is disconnected manually.
07 The reason is unknown.
Priority level
Reason 01and 02 have the priority.
Reason 03 and 06 have the lower priority
Priority principle
In the same priority level, reasons will be indicated in time sequence.
If the reason with priority level happens after the reason with lower priority level, the
former will be indicated first.
If the disconnector is connected after the meter recovers from the reasons with priority,
such as the meter receives the command to connect the disconnector, the connecting
time is over or the credit is recharged, but the disconnector stays in Ready for connected,
then the reason 07 will be indicated. The disconnector could be connected manually.
4.10 Event log
The meter is able to record a large quantity of events, which comprise 13 different types of
events. The event type, corresponding record format, event code, judge method and
record capacity could be seen in the later description.
4.10.1 Standard events recording
No special characteristics are declared in this kind of events.
Record format: even code and occurring time.
Up to 200 standard events can be recorded.
Tab4.10.1.1 Standard even
Code
Corresponding event
3
The time in meter is switched to The meter switches to DST automatically
DST
and the time before switch is recorded.
See detail in 4.5.4
4
The clock is modified-according Clock is modified
to the time before modification
communication
through
remote
5
The clock is modified-according Clock is modified
to the time after modification
communication
through
remote
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Judgment
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6
Malfunction happens in clock
7
The battery
replaced
9
Passive tariff activated
Passive calendar time over
11
Warning register cleared
Clearing the fault register
14
Fault register cleared
The non-volatile register is checked every
hour or the grid is power on
15
Exception reset
The meter doesn’t deal with power off
correctly
16
Measuring unit fault
Measured quantities are not reported
more than 5s or incorrect values being
recorded in 3 seconds running.
17
Upgrading program ready
Confirmation of firmware upgrade, see
details in chapter 4.14
18
Firmware upgrade finished
Firmware upgrade being finished, see
details in chapter 4.14
19
Max Demand reset
Max Demand reset
22
DST is enabled
DST is switched from forbidden status to
enabled status.
23
DST is forbidden
DST is switched from enabled status to
forbidden status
needs
to
The external RTC exists hardware fault or
exception happens in the current clock
be The battery voltage is lower than 3V or the
remaining power is less than 20%
4.10.2 Tampering detection event
These events are all about electricity tampering,
Record format: event code and occurring time.
Up to 200 events can be recorded
Tab4.10.2.1 tampering event
Code
Corresponding event
40
Terminal cover open
Terminal cover being opened
41
Terminal cover close
Terminal cover being closed
42
Appearance of large magnetic Appearance of large magnetic field
field
43
Disappearance
magnetic field
44
Meter cover open
Meter cover being opened
45
Meter cover close
Meter cover being closed
46
Wrong passwords are used for Wrong passwords are used for 3 times
several times
47
Communication unit cover is Communication unit cover is open
open
48
Communication unit cover is Communication unit cover is closed
closed
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of
Judgment
large Disappearance of existing large magnetic
field
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4.10.3 Disconnector control event
These events are about disconnector control.
Record format: code and occurring time, overload threshold when the event occurs. .
Up to 200 such events can be recorded.
Tab4.10.3.1 Disconnector control event
Code
Corresponding event
Judgment
60
Disconnector is disconnected
manually
(g)manual disconnect is executed
61
Disconnector
manually
(e)manual reconnect is executed
62
Disconnector is disconnected (a)remote disconnect or (b) disconnect
remotely
time over is executed
63
Disconnector
remotely
64
Disconnector is disconnected
because of over power
(f)overload disconnect is executed
65
Disconnector
automatically
disconnection
(k)auto reconnect is executed
66
Disconnector is forced to be
connected remotely
is
is
is
connected
connected
connected
after
(c) or (h)remote disconnect or (d)(i)
Reconnect time over is executed
(r)remote force connect is executed
Only operations which are executed by meter will be recorded. For
example, if the disconnector is in Disconnected (0), if the central
system issues a remote disconnection command, the meter will
accept the command but it will not execute (a) remote disconnect
or will record the event. When the central system issues remote
disconnection command, but the disconnector could not be
connected because of overdue credit. In this case, the events that
disconnector is remotely connected and the disconnector is
disconnected because the overdue credit exceeds the allowed
maximum overdue credit will be recorded. Detail disconnector
operation could be seen in 4.9.2.
4.10.4 Power grid event
These events are about power grid.
Record format: when code and occurring time.
Up to 200 standard events can be recorded.
Tab4.10.4.1 Power grid event
Code
Corresponding event
Judgment
71
By pass begins
By pass begin, seeing 4.8.6
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72
By pass ends
By pass end, seeing 84.8.6
73
Inverse phase sequence begins
Inverse phase sequence begins
74
Inverse phase sequence ends
Inverse phase sequence ends
75
Power off
The power grid is power off
76
Power on
The power grid is power on
78
The current of Phase A begins The current of Phase A is changed from
to export
import to export. The detection could be
configured and the default time is 10
seconds.
79
The current of Phase A ends The current of Phase A is changed from
exporting
export to import. The detection could be
configured and the default time is 10
seconds.
80
The current of Phase B begins The current of Phase B is changed from
to export
import to export. The detection could be
configured and the default time is 10
seconds.
81
The current of Phase B ends The current of Phase B is changed from
exporting
export to import. The detection could be
configured and the default time is 10
seconds.
82
The current of Phase C begins The current of Phase C is changed from
to export
import to export. The detection could be
configured and the default time is 10
seconds.
83
The current of Phase C ends The current of Phase C is changed from
exporting
export to import. The detection could be
configured and the default time is 10
seconds.
84
Under current begins
See 4.8.5
85
Under current ends
See 4.8.5
92
Unbalance current begins
See 4.8.4
93
Unbalance current ends
See 4.8.4”
82
The current of Phase C begins The current of Phase C is changed from
to export
import to export. The detection could be
configured and the default time is 10
seconds.
83
The current of Phase C ends The current of Phase C is changed from
exporting
export to import. The detection could be
configured and the default time is 10
seconds.
84
Under current begins
See 4.8.5
85
Under current ends
See 4.8.5
92
Unbalance current begins
See 4.8.4
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93
Unbalance current ends
See 4.8.4”
200
The voltage of Phase A begins Under-voltage begins in Phase A. See
to under-voltage
details in 4.8.3.
201
The voltage of Phase A ends Under-voltage ends in Phase A. See
under-voltage
details in 4.8.3.
202
The voltage of Phase A begins Under-voltage begins in Phase B. See
under-voltage
details in 4.8.3
203
The voltage of Phase A ends Under-voltage ends in Phase B. See
under-voltage
details in 4.8.3.
204
The voltage of Phase A ends Under-voltage begins in Phase C. See
under-voltage
details in 4.8.3
205
The voltage of Phase C begins Under-voltage ends in Phase C. See
to under-voltage
details in 4.8.3.
200
The voltage of Phase A begins Under-voltage begins in Phase A. See
to under-voltage
details in 4.8.3.
201
The voltage of Phase A ends Under-voltage ends in Phase A. See
under-voltage
details in 4.8.3.
202
The voltage of Phase A begins Under-voltage begins in Phase B. See
under-voltage
details in 4.8.3
203
The voltage of Phase A ends Under-voltage ends in Phase B. See
under-voltage
details in 4.8.3.
204
The voltage of Phase A ends Under-voltage begins in Phase C. See
under-voltage
details in 4.8.3
205
The voltage of Phase C begins Under-voltage ends in Phase C. See
to under-voltage
details in 4.8.3.
4.10.5 Power grid long time power off events
These events are exclusive for long time grid power failure
Record format: event ending time and duration.
Up to 20 events can be recorded.
Tab4.10.5.1 Power grid long time power down event
Code
Corresponding event
Long time power off
Judgment
The duration of power off is over the long
time power off period, see details in 4.8.1
4.10.6 High magnetic field event
High magnetic field event will be recorded
Record format: occurring time and the total active energy import when the event
occurs.
Up to 20 such event s could be recorded
Tab4.10.6.1 High magnetic field event
Code
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Corresponding event
Judgment
High magnetic field
The meter is detected that it is in high
magnetic field. The critical value of
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magnetic field is 0.5mT.
4.10.7 Meter cover open event
Meter cover open event will be recorded
Record format: occurring time and the total active energy import when the event
occurs.
Up to 20 such events could be recorded
Tab4.10.7.1 Meter cover open event
Code
Corresponding event
Judgment
Meter cover open
The meter is detected that the meter cover
is open
4.10.8 Terminal cover open event
Terminal cover open event will be recorded
Record format: occurring time and the total active energy import when the event
occurs.
Up to 20 such events could be recorded
Tab4.10.8.1 Terminal cover open event
Code
Corresponding event
Judgment
Terminal cover open
The meter is detected that the terminal
cover is open
4.10.9 Meter programming even
Meter configuration event will be recorded.
Record format: occurring time, total active energy import when the event occurs.
Up to 20 such events could be recorded.
Tab4.10.9.1 Meter programming event
Code
Corresponding event
Judgment
Meter programming event
The meter is programmed through optical
communication.
Meter
configuration
events within 6 seconds will be recorded
as an event. Clearing alarm register and
all events will not be recorded as
configuration event. If the meter is
configured continuously and the last
configuration is clearing alarm, it will not
be recorded as configuration event.
4.10.10 Power grid power off event
The event that power grid is power off will be recorded, including long time power off
and short time power off.
Record format: occurring time, total active energy import when the event occurs.
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Up to 20 such events could be recorded.
Tab4.10.10.1 Power off event
Code
Corresponding event
Judgment
Power off
The power grid is power off
4.10.11 Optical visit event
Optical visit event will be recorded.
Record format: occurring time, whether communication is successful.
Up to 200 such events could be recorded.
Tab4.10.11.1
Code
Optical visit event
Corresponding event
Judgment
Optical communication
An optical communication event will be
recorded, if the meter optical port receives
a handshake frame. If it doesn’t pass the
authentication,
it
is
recorded
as
unsuccessful visit. If it passes the
authentication (HLS), it is considered as
successful visit. The time of disconnecting
visit will be recorded as time of event.
4.10.12 Under-voltage event
Under-voltage event will be recorded.
Record format: occurring time, ending time and the minimum voltage value
Up to 20 such events could be recorded.
4.10.12.1 Under-voltage event
code
corresponding event name
judgment
Under-voltage event of phase A
See 4.8.2
Under-voltage event of phase B
Under-voltage event of phase C
See 4.8.2
4.10.13 Over-voltage event
Over-voltage event will be recorded.
Record format: occurring time, ending time and the maximum voltage value
Up to 20 such events could be recorded.
4.10.13.2 Over-voltage event
code
corresponding event name
judgment
Over-voltage event of phase A
See 4.8.2
Over-voltage event of phase B
See 4.8.2
Over-voltage event of phase C
See 4.8.2
4.10.14 Over-current event
Over-current event will be recorded.
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Record format: occurring time, ending time and the current value
Up to 20 such events could be recorded.
Tab4.10.14.2 Over-current event
code
corresponding event name
judgment
Over-current event
Over-current of each phase
4.10.15 By-pass event
By-pass event will be recorded.
Record format: occurring time, the forward active energy, voltage and current of the
occurring time
Up to 20 such events could be recorded.
4.10.15.1 By-pass event
code
corresponding event name
judgment
By-pass event
Meters by not detected the bypass switch
to detect the bypass state, see chapter
4.8.6 "bypass monitoring"
4.10.16 Failure event analysis


If two events of same type occur within 1 second, the two events will be
considered as occurring in the same time. The table will record from small to
large. This situation will lead deviation in record and should be paid attention to
For example; the terminal cover is opened immediately after it is closed. In the
tampering events log, the terminal close event should be recorded before the
terminal open is recorded, but the recorded order is reverse as the two events
occur at the same time
An event will be recorded 1 second later after it is judged. If power grid is power
off during this period, the event will be judged but not be recorded.For example, if
under voltage event is detected before power off, there will be an under voltage
ending event not under voltage beginning event in the events log after the grid is
power on
4.11 Load record
4.11.1 Load record description
Up to 17 load record channels could be set in this meter, and the total storage capacity is
3678208 bytes, the valid is 3608576 bytes. Storage capacity of every load record channel
could be configured according to customers’ demand; each assigned a channel records
need additional allocation of 4096 bytes
Each channel starting address can be configured by untility (4096 integer times), size
space. Capture cycle and capture objects, capturing cycle can select between 1 minutes
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HXT300 Series user manual
to 1440 minutes.
Power supply company could configure capture cycle (1 minute~1440 minutes are
optional) and capture object. See table 4.11.1:
Tab4.11.1 Capture objects and bytes
Object
bytes
Clock
7
AMR status word of current 1
meter,see4.18.3
Forward active energy
6
Forward active tariff xenergy 6
(x=1~8)
Reverse active energy
6
Reverse active tariff xenergy 6
(x=1~8)
Forward reactive energy
Forward reactive
energy (x=1~8)
6
tariff
x 6
Reverse reactive energy
6
Reverse reactive
energy (x=1~8)
tariff
x 6
Forward apparent energy
6
Forward apparent
energy(x=1~8)
tariff
x 6
Reverse apparent energy
6
Reverse apparent
energy (x=1~8)
tariff
x 6
I quadrant reactive energy
6
I quadrant reactive tariff x 6
energy (x=1~8)
II quadrant reactive energy
6
II quadrant reactive tariff 率 x 6
energy (x=1~8)
III quadrant reactive energy
6
III quadrant reactive tariff x 6
energy (x=1~8)
IV quadrant reactive energy
6
IV quadrant reactive tariff x 6
energy (x=1~8)
Mean value
voltage
of
phase A 2
Minimum value of phase A 2
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voltage
Maximum value of phase A 2
voltage
Mean value
voltage
of
phase
B 2
Minimum value of phase B 2
voltage
Maximum value of phase B 2
voltage
Mean value
voltage
of
phase
C 2
Minimum value of phase C 2
voltage
Maximum value of phase C 2
voltage
Mean value
current
of
phase A 2
Minimum value of phase A 2
current
Maximum value of phase A 2
current
Mean value
current
of
phase
B 2
Minimum value of phase B 2
current
Maximum value of phase B 2
current
Mean value of phase
current
C 2
Minimum value of phase C 2
current
Maximum value of phase C 2
current
Mean value of forward active 4
power of the phase A
Minimum value of forward 4
active power of the phase A
Maximum value of forward 4
active power of the phase A
Mean value of forward active 4
power of the phase B
Minimum value of forward 4
active power of the phase B
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Maximum value of forward 4
active power of the phase B
Mean value of forward active 4
power of the phase C
Minimum value of forward 4
active power of the phase C
Maximum value of forward 4
active power of the phase B
Mean value of reverse active 4
power of the phase A
Minimum value of reverse 4
active power of the phase A
Maximum value of reverse 4
active power of the phase A
Mean value of reverse active 4
power of the phase B
Minimum value of reverse 4
active power of the phase B
Maximum value of reverse 4
active power of the phase B
Mean value of reverse active 4
power of the phase C
Minimum value of reverse 4
active power of the phase C
Maximum value of reverse 4
active power of the phase C
Mean value of forward 4
reactive power of the phase A
Minimum value of forward 4
reactive power of the phase A
Maximum value of forward 4
reactive power of the phase A
Mean value of forward 4
reactive power of the phase B
Minimum value of forward 4
reactive power of the phase B
Maximum value of forward 4
reactive power of the phase B
Mean value of forward 4
reactive power of the phase
C
Minimum value of forward 4
reactive power of the phase
C
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Maximum value of forward 4
reactive power of the phase
C
Mean value of reverse 4
reactive power of the phase A
Minimum value of reverse 4
reactive power of the phase A
Maximum value of reverse 4
reactive power of the phase A
Mean value of reverse 4
reactive power of the phase B
Minimum value of reverse 4
reactive power of the phase B
Maximum value of reverse 4
reactive power of the phase B
Mean value of reverse 4
reactive power of the phase
C
Minimum value of reverse 4
reactive power of the phase
C
Maximum value of reverse 4
reactive power of the phase
C
Mean
value
frequency
of
power 2
Minimum value
frequency
of
power 2
Maximum value of power 2
frequency
Mean value of power factor of 2
phase A
Minimum value
factor of phase A
of
power 2
Maximum value of power 2
factor of phase A
Mean value of power factor of 2
phase B
Minimum value
factor of phase B
of
power 2
Maximum value of power 2
factor of phase B
Mean value of power factor of 2
phase C
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Minimum value of
factor of phase C
power 2
Maximum value of power 2
factor of phase C
Mean value of power factor of 2
total three phases
Minimum value of power 2
factor of total three phases
Maximum value of power 2
factor of total three phases
mean value of three phase 4
forward active power
mean value of three phase’ 4
reverse active power
mean value of three phase 4
forward reactive power
mean value of three phase 4
reverse reactive power
Mean value of reactive power 4
in quadrant I
Mean value of reactive power 4
in quadrant II
Mean value of reactive power 4
in quadrant III
Mean value of reactive power 4
in quadrant IV
V2h
I2h
6
6
User can use supporting PC software to read maximum number of recordings of each
channel after the configuration of capture objects.
If storage capacity of channel 1 is configured with 21840 bytes, the capture objects
for this channels are time, forward active energy, and every record points needs 13 bytes,
so in fact, 1680 points can be recorded.
. Since 21840 is not the integer times of 21840, the equivalent number of storage space is
that 24576 bytes plus an additional 4096 bytes, storage space that this passage
actually occupy is 28672 bytes.
1. Regarding voltage, current, frequency, maximum active power,
minimum active power and average active power, they only
could be chosen once in the whole load capture object.
2. If the power grid is power off during capture process,
information will be lost and the data will be calculated from the
time that the power is power on. For example, if the configured
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capture period is 10 mins and the grid is power off from the 1st
minute to the 5th minute, then the captured data in the 10th
minute is the data from the 6th minute
3. First capture object is requested to configure as time for
reading query.。
4.11.2 Analysis of Failure

Recording of load is executed only at the exact setting time point; it will not
record if meter passes the recording time. E.g., if capture period of channel 1 is
60 min, recording is executed at 00:00:00 each day. If it is power-off at that point,
recording will not be executed after power-on, thus, recording of that day is lost in
the load profile
If capture period of channel 1 is 1440 min (1 day), recording is
executed at 00:00:00 each day. If it is power-off at that point,
Meters will fill point operation for last time for zero load records, as
a frozen data used
4.12 Data billing
4.12.1 Billing logic
The meter could store the latest 18 historical billing data.
Power Supply Company could configure the billing data and time. The billing time could be
chosen from 1st 0:00 to 28st 23:00 of every month.
In the following situation, meter will bill data.
 The current time is the billing time.
 The current time is greater than the last billing time. It’s over a month between
the current time and last billing time.
 The current time is less than the last billing time but it has been the third month
from the month of last billing time.
In the following situations, the meter will judge billing and print historical bill in time.




The power grid is power on.
The time is o’clock.
The meter clock is modified.
The billing time is modified.
4.12.2 Billing object
The billing objects are fixed and can’t be modified through software. See details in
Tab4.12.2.1
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Tab4.12.2.1 Capture object
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Capture object
Data Type
Time
time_date
AMI status bytes,see4.18.3
Unsigned
CT numerator
Float32
CT denominator
Float32
PT numerator
Float32
PT denominator
Float32
Total active energy import
double-long-unsigned
Active energy import T1
double-long-unsigned
Active energy import T2
double-long-unsigned
Active energy import T3
double-long-unsigned
Active energy import T4
double-long-unsigned
Active energy import T5
double-long-unsigned
Active energy import T6
double-long-unsigned
Active energy import T7
double-long-unsigned
Active energy import T8
double-long-unsigned
Total reactive energy import
double-long-unsigned
Reactive energy import T1
double-long-unsigned
Reactive energy import T2
double-long-unsigned
Reactive energy import T3
double-long-unsigned
Reactive energy import T4
double-long-unsigned
Reactive energy import T5
double-long-unsigned
Reactive energy import T6
double-long-unsigned
Reactive energy import T7
double-long-unsigned
Reactive energy import T8
double-long-unsigned
Total active energy export
double-long-unsigned
Active energy export T1
double-long-unsigned
Active energy export T2
double-long-unsigned
Active energy export T3
double-long-unsigned
Active energy export T4
double-long-unsigned
Active energy export T5
double-long-unsigned
Active energy export T6
double-long-unsigned
Active energy export T7
double-long-unsigned
Active energy export T8
double-long-unsigned
Total reactive energy export
double-long-unsigned
Reactive energy export T1
double-long-unsigned
Reactive energy export T2
double-long-unsigned
Reactive energy export T3
double-long-unsigned
Reactive energy export T4
double-long-unsigned
Reactive energy export T5
double-long-unsigned
Reactive energy export T6
double-long-unsigned
Reactive energy export T7
double-long-unsigned
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Reactive energy export T8
Total
import
apparent
double-long-unsigned
energy double-long-unsigned
Apparent energy import T1
double-long-unsigned
Apparent energy import T2
double-long-unsigned
Apparent energy import T3
double-long-unsigned
Apparent energy import T4
double-long-unsigned
Apparent energy import T5
double-long-unsigned
Apparent energy import T6
double-long-unsigned
Apparent energy import T7
double-long-unsigned
Apparent energy import T8
double-long-unsigned
Total
export
apparent
energy double-long-unsigned
Apparent energy export T1
double-long-unsigned
Apparent energy export T2
double-long-unsigned
Apparent energy export T3
double-long-unsigned
Apparent energy export T4
double-long-unsigned
Apparent energy export T5
double-long-unsigned
Apparent energy export T6
double-long-unsigned
Apparent energy export T7
double-long-unsigned
Apparent energy export T8
Total reactive energy 1
quadrant
double-long-unsigned
st
double-long-unsigned
Reactive
quadrant
energy
T1
1st double-long-unsigned
Reactive
quadrant
energy
T2
1st double-long-unsigned
Reactive
quadrant
energy
T3
1st double-long-unsigned
Reactive
quadrant
energy
T4
1st double-long-unsigned
Reactive
quadrant
energy
T5
1st double-long-unsigned
Reactive
quadrant
energy
T6
1st double-long-unsigned
Reactive
quadrant
energy
T7
1st double-long-unsigned
Reactive
quadrant
energy
T8
1st double-long-unsigned
Total reactive energy 2nd double-long-unsigned
quadrant
Reactive
quadrant
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energy
T1
2nd double-long-unsigned
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Reactive
quadrant
energy
T2
2nd double-long-unsigned
Reactive
quadrant
energy
T3
2nd double-long-unsigned
Reactive
quadrant
energy
T4
2nd double-long-unsigned
Reactive
quadrant
energy
T5
2nd double-long-unsigned
Reactive
quadrant
energy
T6
2nd double-long-unsigned
Reactive
quadrant
energy
T7
2nd double-long-unsigned
Reactive
quadrant
energy
T8
2nd double-long-unsigned
Total reactive energy 3rd double-long-unsigned
quadrant
Reactive
quadrant
energy
T1
3rd double-long-unsigned
Reactive
quadrant
energy
T2
3rd double-long-unsigned
Reactive
quadrant
energy
T3
3rd double-long-unsigned
Reactive
quadrant
energy
T4
3rd double-long-unsigned
Reactive
quadrant
energy
T5
3rd double-long-unsigned
Reactive
quadrant
energy
T6
3rd double-long-unsigned
Reactive
quadrant
energy
T7
3rd double-long-unsigned
Reactive
quadrant
energy
T8
3rd double-long-unsigned
Total reactive energy 4th double-long-unsigned
quadrant
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Reactive
quadrant
energy
T1
4th double-long-unsigned
Reactive
quadrant
energy
T2
4th double-long-unsigned
Reactive
quadrant
energy
T3
4th double-long-unsigned
Reactive
quadrant
energy
T4
4th double-long-unsigned
Reactive
quadrant
energy
T5
4th double-long-unsigned
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Reactive
quadrant
energy
T6
4th double-long-unsigned
Reactive
quadrant
energy
T7
4th double-long-unsigned
Reactive
quadrant
energy
T7
4th double-long-unsigned
Total active energy
double-long-unsigned
Total active energy T1
double-long-unsigned
Total active energy T2
double-long-unsigned
Total active energy T3
double-long-unsigned
Total active energy T4
double-long-unsigned
Total active energy T5
double-long-unsigned
Total active energy T6
double-long-unsigned
Total active energy T7
double-long-unsigned
Total active energy T8
double-long-unsigned
Active energy import Phase double-long-unsigned
A
Reactive energy import of double-long-unsigned
Phase A
Active energy
Phase A
export
of double-long-unsigned
Reactive energy export of double-long-unsigned
Phase A
Apparent energy import of double-long-unsigned
Phase A
Apparent energy export of double-long-unsigned
Phase A
Reactive
energy
quadrant of Phase A
1st double-long-unsigned
Reactive
energy
quadrant of Phase A
2nd double-long-unsigned
Reactive
energy
quadrant of Phase A
3rd double-long-unsigned
Reactive
energy
quadrant of Phase A
4th double-long-unsigned
Active energy import Phase double-long-unsigned
B
Reactive energy import of double-long-unsigned
Phase B
Active energy
Phase B
export
Reactive energy
Phase of B
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of double-long-unsigned
export double-long-unsigned
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual
Apparent energy import of double-long-unsigned
Phase B
Apparent energy export of double-long-unsigned
Phase B
Reactive
energy
quadrant of Phase B
1st double-long-unsigned
Reactive
energy
quadrant of Phase B
2nd double-long-unsigned
Reactive
energy
quadrant of Phase B
3rd double-long-unsigned
Reactive
energy
quadrant of Phase B
4th double-long-unsigned
Active energy
Phase C
of double-long-unsigned
import
Reactive energy import of double-long-unsigned
Phase C
Active energy
Phase C
export
of double-long-unsigned
Reactive energy export of double-long-unsigned
Phase C
Apparent energy import of double-long-unsigned
Phase C
Apparent energy export of double-long-unsigned
Phase C
Reactive
energy
quadrant of Phase C
1st double-long-unsigned
Reactive
energy
quadrant of Phase C
2nd double-long-unsigned
Reactive
energy
quadrant of Phase C
3rd double-long-unsigned
Reactive
energy
quadrant of Phase C
4th double-long-unsigned
Active
energy
maximum demand
import BCD8
Active energy import tariff BCD8
1maximum demand
Active energy import tariff BCD8
2maximum demand
Active energy import tariff BCD8
3maximum demand
Active energy import tariff BCD8
4maximum demand
Active energy import tariff BCD8
5maximum demand
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Active energy import tariff BCD8
6maximum demand
Active energy import tariff BCD8
7maximum demand
Active energy import tariff BCD8
8maximum demand
Reactive energy
maximum demand
import BCD8
Reactive energy import tariff BCD8
1 maximum demand
Reactive energy import tariff BCD8
2 maximum demand
Reactive energy import tariff BCD8
3 maximum demand
Reactive energy import tariff BCD8
4 maximum demand
Reactive energy import tariff BCD8
5 maximum demand
Reactive energy import tariff BCD8
6 maximum demand
Reactive energy import tariff BCD8
7 maximum demand
Reactive energy import tariff BCD8
8 maximum demand
Active
energy
maximum demand
export BCD8
Active energy export tariff BCD8
1maximum demand
Active energy export tariff BCD8
2maximum demand
Active energy export tariff BCD8
3maximum demand
Active energy export tariff 4 BCD8
maximum demand
Active energy export tariff 5 BCD8
maximum demand
Active energy export tariff 6 BCD8
maximum demand
Active energy export tariff 7 BCD8
maximum demand
Active energy export tariff 8 BCD8
maximum demand
Reactive energy
maximum demand
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Technical department of Hexing Electrical Co., Ltd
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Reactive energy export tariff BCD8
1maximum demand
Reactive energy export tariff BCD8
2maximum demand
Reactive energy export tariff BCD8
3maximum demand
Reactive energy export tariff BCD8
4maximum demand
Reactive energy export tariff BCD8
5 maximum demand
Reactive energy export tariff BCD8
6 maximum demand
Reactive energy export tariff BCD8
7 maximum demand
Reactive energy export tariff BCD8
8 maximum demand
Apparent energy
maximum demand
import BCD8
Apparent energy import BCD8
tariff 1 maximum demand
Apparent energy import BCD8
tariff 2 maximum demand
Apparent energy import BCD8
tariff 3 maximum demand
Apparent energy import BCD8
tariff 4 maximum demand
Apparent energy import BCD8
tariff 5 maximum demand
Apparent energy import BCD8
tariff 6 maximum demand
Apparent energy import BCD8
tariff 7 maximum demand
Apparent energy import BCD8
tariff 8 maximum demand
Apparent energy
maximum demand
export BCD8
Apparent energy export BCD8
tariff 1 maximum demand
Apparent energy export BCD8
tariff 2 maximum demand
Apparent energy export BCD8
tariff 3 maximum demand
Apparent energy export BCD8
tariff 4 maximum demand
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Apparent energy export BCD8
tariff 5 maximum demand
Apparent energy export BCD8
tariff 6 maximum demand
Apparent energy export BCD8
tariff 7 maximum demand
Apparent energy export BCD8
tariff 8 maximum demand
Monthly mean power factor
long-unsigned
Monthly mean power factor long-unsigned
T1
Monthly mean power factor long-unsigned
T2
Monthly mean power factor long-unsigned
T3
Monthly mean power factor long-unsigned
T4
Monthly mean power factor long-unsigned
T5
Monthly mean power factor long-unsigned
T6
Monthly mean power factor long-unsigned
T7
Monthly mean power factor long-unsigned
T8
1. time_date time_date is time and data data.
2. double-long-unsigned is unsigned 32digits integer data
3. BCD8 is 8 byte BCD code, format is as 0D 08 xx xx xx yy yy
yy yy yy And , xx xx xx is demand value, yy yy yy yy yy
occurring time of demand
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4.13 Optical communication
4.13.1 Physical feature
Diagram4.13.1.1 Front view of optical interface




Compliant with IEC1107 or ANSI C12.18 standard
Signal wave length:900nm~1000nm(infrared light)
Optical transmitting tube（IEC1107 optical port at the Drawing4.13.1.1 right
side, ANSI C12.18 optical port at the left side）
：
2
Luminance(logic level 0)：500µW/cm ≤Ee/T≤5000µW/cm2
Non-luminance(logic level1)： Ee/T≤10µW/cm2
Reception optical tube（IEC1107 optical port at the left side, ANSI C12.18
optical port at the right side） :
Receipting optical signal(logic level 0)：Ee/R≥200µW/cm2
Non-receipting optical signal(logic level 1) ：Ee/R≤20µW/cm2
Ee/R stands for the signal radiation intensity 1cm far away from reference
plane.
Under the EC1107 optical interface, meter with spin hole, in order to secure the
optical port, improve the communication stable. Like Drawing4.13.1.1and
Drawing4.13.1.2.
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Diagram4.13.1.1 IEC1107 optical interface
Diagram4.13.1.2 optical communication head of IEC1107 optical interface
4.13.2 Communication protocol
The IEC62056-21 (mode E) has the following features:
 Standby: 300bps. Meter communication after handshaking: 9600bps
 High level security(HLS)
 The identification mechanism is method 5(GMAC)
 The data communication is with encryption and authentication
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Supporting LLS, only read. Without encryption and authentication, the
password is 8 bytes.
 The length of every data frame is no longer than 255bytes.
 Logic name(LN)
 Supporting communication reading
 Supporting communication setting
 Supporting method operation
 Supporting data block read-write operation
 Supporting time interval reading
 Supporting DLMS V06
Compliant with the following communication standards:
 IEC62056-21
 IEC62056-46
 IEC62056-62
 IEC62056-61
 IEC62056-47
Detail communication data type and communication data format could be got from Hexing
technical support engineer.

4.13.3 Parameter configuration
Optical communication interface has the following two parameters being configured
Diagram4.13.3.1 work parameter configuration with optical communication interface PC software
surface chart
1) Communication baud rate, 1200 BPS, 2400 BPS, 4800 BPS and 9600 BPS can be choose
(2)
Optical interface enable, enable or disabled optical interface can be configured. In some
applications, by banning optical communication interface, maximum security can be realized
Please choose carefully to prohibit optical interface. Once the
parameters configuration takes effect, electric meter can enable
only through the following three ways:
1. Through the RS - 485 communication interface;
2. Through the remote communication;
3. The meter maintenance by coming back to the factory;
without special requirements, Hexing don't open the parameter
configuration function
4.14 RS-485 communication
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This function modules exists in the meter with RS-485.See 1.6
4.14.1 Physical feature
(1) Following the twisted-pair norm of EIA-485 standard
（2）Under Low speed interface, the maximum reaches 9600 BPS. See 1.6
（3）Under high speed interface, the maximum reaches 38400 BPS. See 1.6
（ 4 ） Polarity, under the correct connection of A and B, it will communicate. Specific
interface corresponding to the situation of the electric meter terminal can see installation and
maintenance manual of the corresponding models
（5） RS485 bus can be connected to at most the electric meter number, if need more
large capacity, it can be achieved via RS485 repeater.
4.14.2 Communication protocol
For clients’ customized demand, RS-485 port uses DLMS HDLC communication protocol,
with the following characteristics:
 High level security(HLS)
 The identification mechanism is method 5(GMAC)
 The data communication is with encryption and authentication
 Supporting LLS, only read. Without encryption and authentication, the
password is 8 bytes.
 The length of every data frame is no longer than 255bytes.
 Logic name(LN)
 Supporting communication reading
 Supporting communication setting
 Supporting method operation
 Supporting data block read-write operation
 Supporting time interval reading
 Supporting DLMS V06
 dlms_0xx_HDLC-AddressAssignment
Compliant with the following communication standards:
 IEC62056-21
 IEC62056-46
 IEC62056-62
 IEC62056-61
 IEC62056-47
Detail communication data type and communication data format could be got from Hexing
technical support engineer.
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RS485 communication port can be customized for multiple
functions, such as meter reading for gas meters, water meters and
also for external extension communication modules.
4.14.3 Parameter configuration
RS-485 Optical communication interface has the following two parameters being configured
Diagram.4.14.3.1 RS485 upper company interface in parameter configuration
（1） Communication baud rate between 1200 bps, 2400 bps, 400 bps, 9600 bps.
With high speed RS485 port, communication baud rate parameter
configuration is invalid, with fixed 38400bps. Then RS485 can
conduct on-site fast meter reading, supporting reading 3000 load
data.
（ 2 ） link to link layer enabled: it’s optional. When this function is disabled,
communication procedure will be streamlined.
（3）HDLC frame efficacy enabled: this function is optional.
When RS-485 port is used as external long-distance
communication port, link to link layer has to be disabled and HDLC
frame efficacy is not needed, either. The reason is that external
communication module don’t usually use DLMS HDLC protocol
while link to link layer and HDLC frame efficacy are only in DLMS
HDLC agreement.
（ 4 ） even parity enabled. It’s optional to support different external communication
demand.
（ 5 ） communication address: DLMS, HDLC protocol communication address.
Address range:０００１~3FFD.
（6）register status: two status of meters: new meters and registered meters
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（ 7 ） Timeout period after registration: with the timeout exceeded, meters will be
restored to factory settings. If it’s set to 0, then function is invalid.
Consult DLMS association or Hexing’s technical support for
RS-485 communication’s register mechanism.
4.15 RS-232 communication
4.15.1 Physical feature
（1）Following the DB-9 connection norm of EIA-RS-232-C standard
（2）the maximum reaches 115200bps. See 1.6
（3）Can configure to standard Modem interface mode
（ 4 ） Polarity, Must be properly connected to communication, Specific interface
corresponding to the situation of the electric meter terminal can see installation and
maintenance manual of the corresponding models
4.15.2 Communication protocol
For clients’ customized demand, RS-232 port uses DLMS HDLC communication
protocol, with the following characteristics:
 use HLs
 use method 5（GMAC）for ID encryption
data communication with encryption and identification
support LLS read only, without encryption and identification and 8 bytes
password
 data frame of no more than 255 bytes
 use LN
 support communication read
 support communication configuration
 support method operation
 support block data read
 support time zone read
 support DLMS agreement protocol version V06
 dlms_0xx_HDLC-AddressAssignment
Conform to the following communication standard:
 IEC62056-21
 IEC62056-46
 IEC62056-62
 IEC62056-61
 IEC62056-47
Consult Hexing technicians for detailed communication data and data format.


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4.15.3 Parameter configuration
RS-232 communication port is configurable as below
Diagram.4.15.3.1 RS232 upper company interface in parameter configuration
（1） Communication baud rate can select between 1200bps-115200bps
（ 2 ） link to link layer enabled: it’s optional. When this function is disabled,
communication procedure will be streamlined.
（3）HDLC frame efficacy enabled: this function is optional
When RS-232 port is used as external long-distance
communication port, link to link layer has to be disabled and HDLC
frame efficacy is not needed, either. The reason is that external
communication module doesn’t usually use DLMS HDLC protocol
while link to link layer and HDLC frame efficacy are only in DLMS
HDLC agreement.
（ 4 ） even parity enabled. It’s optional to support different external communication
demand.
（ 5 ） communication address: DLMS, HDLC protocol communication address.
Address range:０００１~3FFD.
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4.16 GSM/GPRS module
4.16.1 General
Type：MGB1-HX3811-1（two frequency）/-2（four frequency）
Diagram4.16.1.1 MGB1-HX3811-2 Moduel
Diagram4.16.1.2 MGB1-HX3811-2 module and meter connect together
4.16.2 Technology Feature


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Working voltage AC 85V~265V，DC 110V~375V
Working Temperature: -40°C to +85°C
Technical department of Hexing Electrical Co., Ltd
HXT300 Series user manual




Storage Temperature
-40°C to +85°C
Working Humidity: <=95%RH
Frequency（Optional）: Dual-band ：EGSM 900/1800MHZ
Quad-band EGSM 850/900/1800/1900MHZ
Transmitted Power: Class 4 (2W) @ 900 MHz
Class 1 (1W) @ 1800 MHz
Receive Sensitivity 850/900MHz: -107dBm
1800/1900MHz: -106 dBm
Dimension：163.0mm×55.0mm×67.0mm
Weight：210.8g
SIM Card:
External SIM connectivity
Multi-slot class 10 (4 Rx / 2 Tx / 5 Sum)
Class B
GSM 07.10 multiplexing protocol

upport GSM/GPRS communication and SMS communication ， can apply SMS







module or GSM/GPRS module based on the requirement ， can handle SMS
message under GPRS communication mode

Support always online, period online and passive activation；

Support client and Server；

Ingress communication protocol DLMS IP mode；

Support alarm information report under GPRS mode；

Support grid power real-time black out alert（optional）；

Can set up to block illegal phone call；

Support hot plug；
LED Indicator instruction
V2
V1/V3
Diagram.4.16.2.1 MGB1-HX3807 module LED indicator position
As Diagram1 indicate：

V1/V3 Indicator light at the right of “Run”, for double color lamp

V1 is GPRS integration module light, red color
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Equally flash: No internet/ No SIM card/ No signal/ module broken
Long close short flash: GSM registration successful
Fast flaseh: log in GPRS successful

V3 is CPU running light, green color
Not 1Hz flash: program running abnormal
1Hz flash: program running well

V2 Indicator light at the left side of “Local”, for local communication light, green
color.
Long flash: module and meter interface well
No flashe: module and meter interface abnormal

V4/V5 Indicator light in the middle of “Net”, double color lamp

V4 for internet communication light, green color
Light off: No internet/ No SIM card/ No signal/ module broken
Fast flash: in logging in GPRS
Slow flash: log in GPRS successful

V5 for data communication light, red color
When module communication with external data through SMS, GPRS, this light
will flash with 10HZ frequency
4.16.3 Parameter Configuration
Diagram4.16.3.1
The PC interface of GSM/GPRS parameters configuration
Can apply GSM/GPRS module parameters configuration as below:
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（1）TCP port
（2）APN name
（3）Client IP: Remote host IP address
（4）Client SMS number: Remote SMS activation mobile number
（5）Number of SMS service center
（6）Test message to activate GSM mode
（7）Heart Beat cycle(min): Used as when the module is configured to send heartbeat
interval
（8）PDP user name, PDP password
（9）GPRS module control:
（10）Schedule the GPRS online period. Can setup online starting time, online cycle,
online frequency. Online frequency can choose daily, odd days, even days, and every 2~7
days, etc.
 Protocol: Can choose TCP、UDP、SMS and GSM. When choose TCP mode, support
GPRS、SMS、CSD at the same time. When choose SMS mode, only support SMS.
When choose GSM mode, only support CSD function.
 GPRS connection mode: Can pick client mode 、 server mode 、 mix mode. When
selecting the client mode, module connects to host automatically. When selecting the
server mode, the module waits for the connection from the host. When selecting the
mix mode, the module stay in server mode in ordinary times and temporary switch to
client mode to report an alert.
 GPRS online method: Can select always on、period on、sms on and mix on. When
selecting always on, the module will keep online permanently. When selecting the
period on, the module will be on only in setting period. When selecting the SMS on,
the module will be on only when receive the correct activation message. When
selecting the mix mode, the module will support both the period on function and SMS
activation.
 PDP validation. Can choose PDP enable/disable. When choosing PDP enable, the
module will use the preset PDP user name and password to log in online. When
choosing PDP disable, the module will not go through user name and password
authentication.
 Message format. Can choose PDU or TEXT.
 Alert report. Can enable/disable alert report function.
 Mobile confirmation. Can choose enable/disable. When choosing disable, the module
will not confirm the mobile number, any number can active the module online. When
choosing enable, the module will confirm the mobile number. Only the setting number
can active the module.
4.16.4 SIM card installed and replacement process
（1）Power off
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Disconnect the line fuse before replace the SIM card. All the
wires should be discharged before SIM card replacement.
Otherwise it may pose a life threatening. Make sure the fuse is
disconnected and stored in a safe place in order to guarantee no
wrong operration lead to electricity in the process of replacement.
（2）Open the terminal cover, take off GPRS module
（3）User nipper or other tools with insulation handle press on the yellow button side of
SIM base, poping the SIM card.
Diagram4.16.4.1 MGB1-HX3807open the SIM card of the module
（4）Open SIM Card case
（5）Insert SIM Card
Check if the SIM card have the related function(like GPRS),
sufficient fund before insert the SIM card to the module.
（6）Lock SIM Card case
（7）Close SIM card cover
（8）Power on
（9）Wait for 2 minutes, observe whether the GPRS signal strength appears on the
meter normal (At least one indicator, see chapter 4.7.1”LCD screen introduction” ),the
indicator appears stand for installed correctly. If not present, execute from step 1 till GPRS
signal display properly. Otherwise the installation process can be regarded as failed,
further analysis will be applied. There are several situations will lead to installation failed:
 SIM card balance insufficient
 GSM/GPRS working parameters like APN configuration error (see chapter
4.16.1.3 "parameter configuration")
GSM/GPRS module is not installed correctly, can check by GSM/GPRS module indicator
(see chapter 4.16.1.2 "features") and the communication indicator on meter display (see
chapter 4.7.1 "LCD screen is introduced")
（10）Close front cover
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（11）Seal front cover
4.17 Software Update
The electronic meter can be software upgraded(in order to prevent the possible not
detected BUG in the short term, or extending function of electronic meter) upgrades as
well as through the local photoelectric communication interface, also can through the RS 485 communication interface or remote communication interface.
According to the modular design idea, upgrade is for application
part only
4.17.1 The Upgrade Process
（1）PC or master station initialize the upgrade process
（2）PC or master station distribute upgrade data packet
（3）PC or master station check whether updates are all correct. If not, return to the
step (2), distribute upgrade package again
（ 4 ） PC or master station read the upgrade software version number and MD5
confirmation code. If it's not right, the meter regard that the upgrade failed,
return to the step (1), start the upgrade process once again
（ 5） After the upgrade package has been confirmed, PC or master station set the
activate time to upgrade package, if the set up time is before the current time,
the activation will immediately start
（6）By the activation time, meter start the upgrade, activate the new software version
（7）After the upgrade is complete, the meter use the new version of the software to
work
If you need more details about update information, consult hexing technical
support.
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Diagram4.17.1.1 the Upgrade Process
4.17.2 Upgrade safety protection measures
The meter use the following method to guarantee the safety of upgrade：

PDA or CAS initiated initialize the upgrade process, the meter will test whether
the device support the software upgrade, if the device can't support the new
software version, the meter will refuse to upgrade, to avoid PDA or CAS upgrade
with wrong package

Each data frame transmission contains CRC confirm in DLMS standard

Each mirror data block contains CRC confirm

PDA or CAS compared whether all data blocks have been successfully received

In order to determine whether the whole mirror upgrade package was
successfully received, PDA or CAS compare the software version number and
MD5 check code in the storage register before upgrade
Before the upgrade starts, the meter will confirm the check code of MD5 again
and compare with the MD5 check code which generate before
Compare multi times read/write function in the storage of Image Code to ensure
each time read/write is correct
Check the program again after burning, prevent the mistake during the burning



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4.17.3 Upgrade Features and Attention
Upgrade Features
Use the PDA to mirror update packet to the meter need < = 15 minutes
In the process of upgrading packet transmission, other meter functions will not be
affected
Mirror data block check time < = 3 minutes
Meter software upgrades time < = 2 minutes
In the upgrade process, the meter can do install upgrade process only, not to run
any other functional tasks
In order to decrease the risk of upgrade failure and prevent possible
disturbance error, please do not place objects with strong magnetic
field near the meter during the process
4.18 Battery
There is a lithium battery with 1000mAh in the meter, to maintain the calendar clock,
record of opening meter cover and possible key-press wake-up display when power down.
The battery is changeable and user authority is equal to plug in modem. The installation
position could be seen in Chapter 3 (Mechanical construction)
4.18.1 Battery voltage test
The current battery voltage value is calculated via AD sample. The sampling time points
are:
Battery voltage calculation accuracy is: + / - 0.1 V.
Calculated battery voltage range under normal work : 3.4 ~ 3.8 V.
Out of battery voltage display value is invalid;
4.18.2 Remaining battery power monitor
The meter has the function of remaining battery power monitor.
The following formulas are used to calculate current remaining battery power
Current remaining battery power= (Remaining battery power before power down –
Energy consumed by power down)
Energy consumed by power down =Power down duration * Average power down
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working current
Average power down working current is the theoretical maximum average power
down working current40μA.
（NOTE Remaining battery power is only for reference which is not standard calculated
method.）
4.18.3 Judgment of battery power shortage
When the battery voltage is under 3.2V or the remaining power is under than 20% for 10
seconds, the meter will send an alarm for changing the battery. There is
a battery
power shortage indicator on LCD (see 4.6.1 Introduction of LCD). The
event of battery
should be changed will be recorded.When meter works completely using battery for 20000
hours, the remaining battery power will be lower than 20%.
4.18.4 Process of changing battery
The process of changing battery is as below:
（1）Disconnect the power grid
Disconnect the line fuse before replace the battery. All the
wires should be discharged before battery replacement. Otherwise
it may pose a life threatening. Make sure the fuse is disconnected
and stored in a safe place in order to guarantee no wrong
operation lead to electricity in the process of replacement.
（2）Open the front cover
Diagram4.18.4.1 the Process of Opening Front Cover
（3）Take out the battery
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Diagram4.18.4.2 the Process of Taking Out Battery
（4）Push the display button repeat till the meter is no longer show the indictor。
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Diagram4.18.4.3 the Process of Display Button
（5）Reinstall the new battery
Diagram4.18.4.4 Install the New Battery
Battery cable should be manual adjust to the battery box, avoid the
front cover can’t close problem. Figure 4.18.4.4 centre-left the
graph is correctly installed, right is the incorrect installed.
（6）Push the display button, the meter has showed indicate that the current battery
has been installed correctly
（7）Close the front cover
（8）Connect to the grid
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（9）Use PC or portable device to execute battery replacement operation, the actual
operation includes: restore the battery remaining power, electric meter time pair, clear
warning registers, communication read battery voltage and battery remaining to determine
whether the replacement is successful or not.
（10）Seal the front cover
4.18.5 Battery life
Average working current
 Power grid is power on power on: 0.1µA < I < 1µA
 Power grid is power down (displayed without pressing button) 15µA < I <
25µA
 Power grid is power down (displayed with pressing button) 30µA < I < 60µA
Service life
It can work for 15 years if total power grid is power down no more than 20000 hours
4.19 Meter Self-detecting
The meter will store data and detect itselves every day and when the power is on.
Themeter also monitors the work status real time and display the work status in LCD.
The master station (data center) obtains the alarm, AMI status to judge whether the
meter works normally.
The below three types detection registers are provided:
4.19.1 Fault register
Fault register used for liquid crystal display (LCD), to judge the current meters failure
state at the site
The register has 4 bytes and the following information will be indicated:
Byte0
Clock invalid
Replace battery
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Set status
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Byte1
data error
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The clock has fault
The battery power is short
Keep
Keep
Keep
Keep
Keep
Keep
Set status
Bit0
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data error
NV memory error
Measurement
system error
watchdog error
Reserve
data error
Reserve
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Byte2
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Set status
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Byte3
Strong magnimat
Keep
Non-volatile memory is fault
The measurement chip has
fault
Exceptional set occurs
Keep
Data storage has exception
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Set status
Bit0
The magnetic field
exceeds 0.5mT
The Fram has error
is
Fram
memory Bit1
error
Reserve
Bit2
Keep
Dataflash error
Bit3
The Dataflash has error
Reserve
Bit4
Keep
Reserve
Bit5
Keep
Reserve
Bit6
Keep
Reserve
Bit7
Keep
Byte1、Replace battery only can cleared by communication. The other will be cleared
automatic when error disappear。
When showing the “NV memory error”, the meter will fix display the
fault register interface(see detailed chapter4.7.3”display item and
format”), to reminder the meter has critical fault
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4.19.2 Alarm register
Warning register as happened in the history of warning prompt the meters, only
communication can remove the data, otherwise, as long as had warned, warning
sign will remain.
The register has 4 bytes and the following information will be indicated:
Byte0
Set status
Clock invalid
Replace battery
Bit0
Bit1
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Byte1
Set status
data error
data error
NV memory error
Measurement
system error
watchdog error
fraud attempt
Bit0
Bit1
Bit2
Bit3
data error
Reserve
Bit6
Bit7
Bit4
Bit5
Byte2
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
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Keep
Keep
Non-volatile memory is fault
The measurement chip has
error
Exceptional reset occurs
Tampering events
happened
Data storage has error
Keep
Set status
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Byte3
Reserve
The clock is fault
The battery needs to be
replaced.
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Keep
Set status
Bit0
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Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Keep
Keep
Keep
Keep
Keep
Keep
Keep
4.19.3 AMI status
AMI status word used for remote communication, in order to monitor the running
status of electric meter
Register contains a byte, information indicator is described below
Byte0
Critical error（CIV）
Set status
Bit0
Clock invalid
Bit1
Data not valid（DNV） Bit2
Daylight saving
Reserve
Clock adjusted
Bit3
Bit4
Bit5
TOU error
Power down
Bit6
Bit7
The register is fault
Calibration has error
The clock is fault
Clock reset exceeds the
limit
The clock is fault
The register is fault
Calibration has error
DST mode
Clock reset exceeds the
limit
Power off event happens.
AMI status word once load records capture, automatically remove, start to inspect the
status of the current load cycle information, remote center can be read by AMI status word
in electric meter load record to judge the working condition of electric meter in load cycle.
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5 Install and uninstall
Before the installation check whether the meter is clearly visible damage in the
process of transportation (such as meter cover damaged, hang damaged, seal damaged,
the LCD broken, etc.), change the meter in case of damage.
5.1 Assembly
According to the electric meter weight and assembly dimension assembly on the
meter installation panel or similar equipment. (see section 1.8 "weight and mounting
dimensions"). According to the following process to carry out the assembly work:
1. Determine the correct installation position of the meter. Make sure that will be used
to meter installation hole without the cable assembly, prevent damage of cable to cause
personal safety.
2. Use the zero line and fire line test equipment, such as the electric test pencil) to
test the line voltage, to ensure the cable without electricity.
3. Choose the location of the hang (high or low position).
4. In the assembly panel surface tag the electric meter mounting position (fixed
triangle figure 5.1.1)
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Diagram.5.1.1 Mounting Position
5. Three assembly holes on the assembly panel
If the mounting panel is with adjustable assembly, not executed
step 4 and 5.
6. Open the meter terminal cover
7. According to the choice of hanging position adjust hang (see figure. 5.1.2 and
figure. 5.1.3).
Factory unified adjust products for the low position, to match the
packing box and prevent damage in transit.
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Diagram 5.1.2 Hang Position
8. Use three set screws to retain the meter
The diameter of the set screw in the bottom is greater than 7
mm, the diameter of the top set screw is greater than 11 mm, to
ensure the installation is firmed.
5.2 Wiring
Disconnect the line fuse before replace the wires. All the wires
should be discharged before wire replacement. Otherwise it may
pose a life threatening. Make sure the fuse is disconnected and
stored in a safe place in order to guarantee no wrong operation
lead to electricity in the process of replacement.
Provide over current protection
There is no over-current protection device inside the meter,
therefore the installation after install over-current protection device
needs to be synchronized.
Connection
1. Cut the length of the cables to the requirements, and use the wire stripping pliers
wires. This series of meters recommended bare metal parts after stripping length is 22
mm.
It is strongly recommended that in accordance with the
recommended length of the wire stripping operation, to ensure that
the bare metal parts is long enough, can apply two connection
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screws at the same time, also the bare metal parts will not exceed
terminal box wiring holes, ensure the safety of the insulation and
protection effect.
2. Inserted the cables to the corresponding terminal connection hole (wiring holes can be
found in the chapter 1.9 "wiring diagram"), tight the connector screws (maximum torque is
3 nm).
When use the wire with a smaller sectional area, (such as 4mm2), wire must be
placed in the middle of position, to ensure the connector screws will not deflection.
Diagram 5.2.1 Wiring
Recommended use the appropriate testing tools such as
multi-meter before and after the installation to do connecting
input/output test, to ensure the correct connection.
Tighten Connection Screws
If the connection screw is not tight enough, will lead to increase
connection resistance, which can lead to danger by power loss and
heat on the terminal.1mΩcontact resistance under 80A can lead to
6.4W power loss.
Don’t pull out wires when terminal cover is closed
When the terminal cover is closed, don’t pull out the connection
wires, may lead to unknown danger.
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5.3 Wiring Check
Before function check of the meter, the following thing need to be verified:
1. Whether the meter with the right serial number
2. Whether all part of the meter is sealed except the terminal cover
3. Whether all the connection screws are tight
4. Whether input/output connection are correct
5. Whether the zero line connection is right. The swap of phase line and zero line may
cause damage
After successfully check the wire connection, assemble the terminal cover, put on the
screw and seal
5.4 Function check
The installed meter should do the following process before use:
1. Insert the fuse, connect to the grid
2. Check the meter display, check the indictor of trouble free, no phase inverse, no
open cover, no strong magnetic field(no S7 instructions on LCD, see chapter 4.7.1’LCD
screen introduction’), no current indictor when there is no load
3. Button display voltage value, double check the shown voltage is right
4. Connect the load, confirm the current indictor on the meter
5. Check meter external control relay (if the relay is applied) is at the right state of
user application
5.5 Uninstall
Uninstall the meter by the following steps:
1. Disconnect the meter, no image show on the display
Disconnect the line fuse before uninstall. All the wires should
be discharged before uninstall. Otherwise it may pose a life
threatening. Make sure the fuse is disconnected and stored in a
safe place in order to guarantee no wrong operation lead to
electricity in the process of uninstall
Attention：Can’t use the display information to judge whether the
meter is discharged. Based on the different requirement of
customers, some meters don’t shut display when the meter is
discharged.
2. Open the seals on the terminal cover
3. open and remove the terminal cover
4. Use the voltage testing device (such as multi-meter) to test the connection wires of
the meter to ensure there is no voltage applied. And double check on the disconnection of
the fuse
5. Use the appropriate screw driver to open the connection screws and remove the
wires
6. Use the appropriate screw driver to remove the screws of voltage/current wires
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7. Use the appropriate screw driver to remove the assembly screws of the meter
8. Uninstall the meter
Warning： When execute the process 7 and 8, open and take out
the bottom assembly screws first and then the top assembly
screws. The meter need to be hold during the disassembly to
prevent the fall.
9. Install the replace meter if needed(See the installation chapters for details)
If the meter is not temporary installed, package the voltage/current
wires with insulating materials and ensure no metal part exposed.
Otherwise it will pose a life threat.
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6 Service
6.1 Fault Operation
If the LCD can't display correctly, or data communication does not work, can be in
accordance with the inspection as follows:
1. Whether the meter is on the grid (whether the fuse is connected)
2. Whether the environment temperature is beyond the limit working temperature
range of the meter
3. Whether the optical communication interface or LCD display window is clean (no
scratches, no paint, no fog, or other ways of pollution)
If not the above reasons lead to failure, meters should be unloaded, and sent to
Hexing service center (according to section 6.3 "meter repair").
6.2 Fault Code
The meter fault code detailed description see chapter 4.18.1 "fault register ".
Non-continuous and non fatal fault will disappear automatically when the fault is cleared.
Continuous or fatal failure will not automatically reset. If the meter shows fault code, the
meter can be considered to be unsafe, cannot continue to use, refer to section 6.3 "meter
repair process execution" to execute the next steps.
6.3 Meter Repair
If the meter repair is necessary, then can be executed in accordance with the following
process:
1. If the meter has been installed, then uninstall the meter (see section 5.5 "uninstall"),
and reinstall an alternative meter.
2. Describe the fault phenomenon as much as possible (if you can, please provide
with meter fault code), indicating the name, phone number of the responsible person, so
that will convenient the follow-up maintenance. Please indicate the serial number and
complete meter model (meter model named see chapter 1.6 "definition model named",
can be in meters nameplate)
3. Packaging the meter, ensure the meter will not be damaged during the transport.
Try to use the original package. Don’t put in a meter with missing part
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4. Send the electric meter to a certified hexing service center
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7 Maintenance
Don’t need to verify the meter within the life cycle. Can execute meter maintenance
based on local regulations. Recommended every 5~10 years.
7.1 Wash
Use dry cloth to clean the surface of the meter. Wipe the stains and insects.
Warning：Flowing water and high pressure water equipment is not
allowed to clean the meter, may lead to short circuit.
7.2 Error and function check
Execute the following process to do error and function check
1. Insert the meter to the corresponding terminal of error test bench. (electric meter
wiring hole number detailed in chapter 1.9 "wiring diagram"),tighten the connection
screws(maximum torque is 3Nm)
2. Corresponding the pulse testing part of the error testing bench to the LED or
connect to the electric pulse transmit terminal.(Actual auxiliary terminal definition can be
found on installation manual or on the wiring diagram on the nameplate.)
Diagram7.2.2 HXE310 Test on the error testing bench
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3. Start the error test bench. Put on rate voltage but no current. Confirm no current
indictor display on LED. Check whether the electric meter is displayed correctly
(trouble-free code instructions).
4. After the meter is power on, set the meter to test mode through the upper machine
communication. The test mode is with the highest level of security. Need both
communication key and administrator password to enter the test mode.
Attention ： In order to not affect the actual accumulated power
when doing the test, each time meter is off from the electricity, the
meter need to set into the test mode again.
5. Start the error testing bench
6. Executing relay control operation through the upper machine (if the relay is
applied), check whether the relay is working properly.
7. Take off the meter from the error test bench after test complete.
7.3 Reinstall
In order to avoid the change of asset management, recommend reinstall the meter at the
former position.
The installation process detailed in chapter 5 "install and uninstall".
8 Scarp Processing
This chapter describes the right method of meter scarp processing.
Compliant ISO 14001 environmental certification specification, the components of the
electric meter is maximum extent separable, thus to provide corresponding abandoned
and recycling station after disassembled.
Attention ： Meter scarp processing reference to local waste and
environmental protection laws and regulations.
Meter can be disassembled into different parts, the recommended waste treatment
methods are as follows:
Parts
Recommend scarp processing method
PCB board
Electronic waste, scarp according to local regulations
Metal parts, including iron
Provided to the metal material recycling
part of optical
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communication, terminal
connection copper bar,
internal current cables etc
Plastic
9
Recycle bin for plastic materials, otherwise can burn
Attachment：The product conformance statement
Hangzhou Hexing Electricity Co., Ltd declare
HXE310 series meters followed the following instruction or standard
---------------------------------------------------------------------------------------------------------------------Compliant DLMS/COSEM protocol standard
Certification No. 1327
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Compliant IEC standard
IEC62053-11
IEC62053-22
IEC62053-23
KEMA 72141373 -TIC 7074-13
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Because the meter series with variety of types, the above certification
develops in typical models. Most of the models with tiny difference,
Hexing promised its certification compliance.
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Technical department of Hexing Electrical Co., Ltd