(3$&
(3$&
1XPHULFDOGLVWDQFHUHOD\ZLWKLQWHJUDWHG
DXWRPDWLFDQGFRQWUROHTXLSPHQW
,QVWDOOHU·V*XLGH
*,
P-2
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
P-3
GI 1.6882
EPAC 3100/3500
PREFACE
Dear reader,
We are continuously endeavoring to improve the standard of quality of our brochures. This form
has been designed to enable you to send in your remarks and comments. Please return the form,
duly filled in, to the following address. Thank you in advance.
-----------------------------------------------------------------------------Address:
ALSTOM P & C
Marketing Department
Avenue de Figuières
F-34975 LATTES CEDEX
Have you found any errors in the brochure ? If so, please indicate where they are.
Did you find the brochure comprehensible and well set out ?
Please indicate here any proposals for improvement.
Have we supplied you with sufficient information to permit the understanding of the product
presented here ?
If not, what is missing and at what points should we supply additional indications ?
Name:
Position:
Date:
Utility or company:
Address:
Telephone:
Post/Zip Code :
City:
Country:
Concerning the item:
P-4
EPAC 3100/3500
GI 1.6882
INTRODUCTION
The documentation covering the EPAC 3100/3500 Distance Protection is subdivided into 3
documents. Each document provides its recipient with the information needed for the performance of his or her tasks. The following table summarizes the titles of the documents, their
recipients and the supply date.
Document Title
Recipient
Supply date
Installer’s Guide
Installer of Equipment
Delivered with each
equipment
User's Guide
Expert in charge
of equipment
On order
Commissioning and
Maintenance Guide
Agent specializing
in commissioning equipment
and in preventive maintenance
On order
P-5
GI 1.6882
EPAC 3100/3500
REASON FOR UP-DATES
GI 1.6882
INSTALLER'S GUIDE
First edition: 06/97
Indice
Updating
date
Updating subject
EPAC 3100/3500
P-6
EPAC 3100/3500
GI 1.6882
STATE OF UP-DATES
EPAC 3100/3500
Index
A
B
C
D
E
F
G
H
I
J
K
L
M
N
Updating
date
INSTALLER'S GUIDE
No.
AMENDED
PAGE INDEX
PRELIMARY PAGES
P-1
P-2
P-3
P-4
P-5
P-6
P-7
P-8
TEXT AND DRAWING PAGES
GI 1.6882
No.
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
CHAP 1
APPEND.
1-1
1-2
1-3
1-4
A-1
A-2
A-3
A-4
CHAP 2
2-1
2-2
2-3
2-4
2-5
2-6
CHAP 3
3-1
3-2
3-3
3-4
3-5
3--6
CHAP 4
4-1
4-2
4-3
4-4
CHAP 5
5-1
5-2
AMENDED
PAGE INDEX
P-7
GI 1.6882
EPAC 3100/3500
GENERAL CONTENT
CHAPTER 1 - TRANSPORTATION AND STORAGE CONDITIONS ______________________________ 1-1
1.1.
1.2.
1.2.1
1.2.2
TRANSPORTATION____________________________________________________________
STORAGE ON SITE OR IN A WAREHOUSE _______________________________________
Normal Storage Conditions ____________________________________________________
Long-Term Storage Conditions __________________________________________________
1-3
1-4
1-4
1-4
CHAPTER 2 - UNPACKING _____________________________________________________________ 2-1
2.1.
2.2.
UNPACKING _________________________________________________________________ 2-3
REPACKING _________________________________________________________________ 2-5
CHAPTER 3 - MECHANICAL CHARACTERISTICS AND INSTALLATION CONDITIONS ______________ 3-1
3.1.
3.2.
3.3.
OVERALL DIMENSION _________________________________________________________ 3-3
WEIGHT ____________________________________________________________________ 3-4
ASSEMBLY __________________________________________________________________ 3-5
CHAPTER 4 - ELECTRICAL CONDITIONS __________________________________________________ 4-1
4.1.
4.2.
ELECTRIC POWER SUPPLY ______________________________________________________ 4-3
GROUNDING ________________________________________________________________ 4-4
CHAPTER 5 - EXTERNAL CONNECTIONS _________________________________________________ 5-1
5.1.
5.2.
5.3.
5.4.
5.5.
ANALOG INPUT CONNECTIONS ________________________________________________ 5-3
INPUT AND OUTPUT CONTACTS CONNECTIONS __________________________________ 5-6
POWER SUPPLY CONNECTIONS _______________________________________________ 5-10
EQUIPMENT FAULT SIGNALLING CONNECTIONS _________________________________ 5-10
COMMUNICATION OPTION CONNECTIONS ____________________________________ 5-10
APPENDICES ________________________________________________________________________ A-1
FRONT PANEL CONNECTIONS AND REAR PANEL TERMINAL BLOCK CONNECTIONS ___________ A-3
FIBRE OPTIC CONNECTIONS ___________________________________________________________ A-3
SIMPLIFIED DIAGRAM EPAC 3132 ______________________________________________________ A-4
P-8
EPAC 3100/3500
GI 1.6882
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GI 1.6882
EPAC 3100/3500
CHAPTER 1
TRANSPORTATION AND STORAGE
CONDITIONS
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
1-1
GI 1.6882
EPAC 3100/3500
CONTENT
PAGE
1.1.
TRANSPORTATION____________________________________________________________ 1-3
1.2.
1.2.1
1.2.2
STORAGE ON SITE OR IN A WAREHOUSE _______________________________________ 1-4
Normal Storage Conditions ____________________________________________________ 1-4
Long-Term Storage Conditions __________________________________________________ 1-4
1-2
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
1-3
GI 1.6882
EPAC 3100/3500
The EPAC is delivered in a cardboard box. The following equipment is contained inside the box:
-
the EPAC 3100/3500,
-
a plastic bag containing the installer’s guide,
-
the assembly kit screw-in or Faston connectors,
-
two floppy disk with the man machine interface sofware.
The EPAC 3100 is the frame mounted "L Case" EPAC.
The EPAC 3500 is the cabinet mounted "L Case" EPAC.
1.1.
TRANSPORTATION
The gross weight of the equipment in its packing is 12 kg. It can easily be moved by one person.
The precautions to be taken when transporting the package are those used for the transportation
of electronic equipment.
The cardboard box can withstand a weight of 100 kg without being deformed. You should
therefore avoid stacking more than 5 boxes of the same equipment or any other package
weighting more than 80 kg on top of it.
When handling the box, avoid dropping or knocking it. If the box falls more than 0.80 metres
on one of its surfaces, the equipment components (modules, connectors, board-guides, etc.) may
be damaged or distorted. If the box falls on its corner, the equipment may be damaged in the
same way. Great care must therefore be taken when handling the box.
The packing guarantees that the equipment will remain in good condition when submitted to
accelerations of less than 3 g (g = 9.81 m/s2) for all modes of transport (overland, railway, sea
and air).
The vibration resistance of the EPAC 3100/3500 is in conformance with the response curve
defined by the IEEE Seismic Testing of Relays standard.
1-4
EPAC 3100/3500
1.2.
STORAGE ON SITE OR IN A WAREHOUSE
1.2.1
Normal Storage Conditions
GI 1.6882
While the equipment is stored on site, it must be kept in its original packing.
The cardboard box must be put on a pallet so that it does not absorb any humidity from the ground.
1.2.2
Long-Term Storage Conditions
For long-term storage in a warehouse and for certain types of transport (overland, sea and
tropical), we recommend the use of moisture barriers in order to keep the level of humidity inside
the envelope at a level lower than 5 g of water per m3.
These packages contain dessicant pouches that must be renewed every 6, 12 or 24 months
depending on whether the packing is provided for overland, sea or tropical conditions. The
dessicant pouches are put inside the envelope but do not touch the equipment. Therefore the
equipment may be stored for 3 years in the following storage conditions (no tests are needed
during this period to check that the relay operates correctly):
-
stored in a sheltered area without air-conditioning,
-
temperature: - 40°C to 70°C,
-
relative humidity: less than 95% with no condensation.
GI 1.6882
EPAC 3100/3500
CHAPTER 2
UNPACKING
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
2-1
GI 1.6882
EPAC 3100/3500
CONTENT
PAGE
2.1.
UNPACKING _________________________________________________________________ 2-3
2.2.
REPACKING _________________________________________________________________ 2-5
2-2
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
2-3
GI 1.6882
2.1.
EPAC 3100/3500
UNPACKING
Procedure:
1.
Place the box on the ground or on a pallet, with the pictogram the right way up.
2.
Cut the adhesive tape width-wise using the blade of a sharp instrument, on the upper
right and left edges.
3.
Remove the tape to get access to the staples holding flaps.
4.
Remove the staples.
5.
Open the flaps by folding them back, as shown on the packing diagram.
6.
Remove the various elements from the cardboard box, and check that the contents correspond to the list given in chapter 1.
7.
Remove the packing blocks and put the EPAC on a table with the assembly kit and
documents.
8.
Put the packing blocks back into the box.
If the EPAC 3100/3500 is to be temporarily used on site,
keep the packing and re-use it to repack the equipment.
However, if the EPAC 3100/3500 is installed definitively,
the packing can be destroyed.
2-4
EPAC 3100/3500
GI 1.6882
Superior hand packing block
Product
Inferior hand packing block
UP
N
DOW
Card board
base
Figure 2.1a: Packing / Unpacking the EPAC 3100/3500
2-5
GI 1.6882
2.2.
EPAC 3100/3500
REPACKING
Procedure:
1.
Repeat the unpacking procedures in reverse order.
2.
Put installer guide in a plastic bag.
3.
Install the superior-hand and inferior-hand packing blocks on the rack.
4.
Put the assembly in the cardboard box.
5.
Put the plastic bags containing the documents and connection kit connectors on the
packed rack.
6.
Fold down the four flaps.
7.
Staple flaps.
8.
Use adhesive tape to close the box.
9.
10.
Clearly indicate the following information on the box:
-
the equipment version,
-
the serial number,
-
the purchase order and contract number,
-
the delivery address (workstation designation, person to be contacted, etc.).
Put the advice of dispatch in a plastic bag and stick the bag to the box.
2-6
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
GI 1.6882
EPAC 3100/3500
CHAPTER 3
MECHANICAL CHARACTERISTICS
AND INSTALLATION CONDITIONS
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
3-1
GI 1.6882
EPAC 3100/3500
CONTENT
PAGE
3.1.
OVERALL DIMENSION _________________________________________________________ 3-3
3.2.
WEIGHT ____________________________________________________________________ 3-4
3.3.
ASSEMBLY __________________________________________________________________ 3-5
3-2
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
3-3
GI 1.6882
3.1.
EPAC 3100/3500
OVERALL DIMENSION
The overall dimensions of the EPAC 3100/3500 depend on whether it is frame- or cabinetmounted.
304,3
412,50
177,00
Figure 3.1a: Rack dimensions when frame-mounted (EPAC 3100)
3-4
EPAC 3100/3500
GI 1.6882
304,3
483,0
88,9
177,0
57,1
15,5
Figure 3.1b: Rack dimensions when cabinet-mounted (EPAC 3500)
3.2.
WEIGHT
-
<12 kg.
3-5
GI 1.6882
3.3.
EPAC 3100/3500
ASSEMBLY
The frame-mounted EPAC 3100 is attached with 8 screws at the top and bottom of the front
panel, as shown in Figure 3.1c. The cabinet-mounted EPAC 3500 is attached with 4 screws on
the left and right of the front panel.
412
24,8
5,2
362,5
246
116,5
168,3
Figure 3.1c: Location of attachment points for frame mounting (EPAC 3100)
465,1 +1,6
450 mini
4 M6 tappings
101,6
38,1
Slides mandatory
37,5
Figure 3.1d: Location of attachment points for cabinet mounting (EPAC 3500)
177,8
3-6
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
GI 1.6882
EPAC 3100/3500
CHAPTER 4
ELECTRICAL CONDITIONS
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
4-1
GI 1.6882
EPAC 3100/3500
CONTENT
PAGE
4.1.
ELECTRIC POWER SUPPLY ______________________________________________________ 4-3
4.2.
GROUNDING ________________________________________________________________ 4-4
4-2
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
4-3
GI 1.6882
4.1.
EPAC 3100/3500
ELECTRIC POWER SUPPLY
Rated Auxiliary Power Supply:
48, 60, 110, 125, 220 and 250 VDC
Permitted Variations:
-20% to + 20%, -20% to + 15% for 250 V
Power consumption in the basic version:
25 W
Temperature Range in operation:
-20°C to + 55°C
Maximum permitted ripple:
< 12%
Relative Humidity:
less than 95% with no condensation
The rated value of the auxiliary supply must correspond to
the value given on the EPAC 3100/3500 front panel.
4-4
EPAC 3100/3500
4.2.
GI 1.6882
GROUNDING
The equipment is to be grounded to an earth network with a resistance that is always less than
3 ohms. Therefore, the distance between the equipment and the real grounding point must be
minimized.
The grounding braid is connected to the terminal at the rear of the EPAC 3100/3500 rack. It
is identified by the ground symbol. The following diagrams show the grounding braid
connections for the different EPAC 3100/3500 options.
X6
1
2
27
1
27
1
28
2
28
2
27
1
27
1
28
2
28
2
X2
X1
X4
X3
27
1
X5
27
X6
28
28
X1
X3
X2
X4
X5
2
X18
Current loop
To UR
Protection cable
Figure 4.2a: Grounding for current loop
X6
1
2
X1
27
1
27
1
28
2
28
2
27
1
27
1
28
2
28
2
X3
X2
X4
NC
D26
27
1
X5
27
28
X6
28
X1
X3
2
X2
X4
X5
KBus link
Protection cable
Figure 4.2b: Grounding for KBUS link
GI 1.6882
EPAC 3100/3500
CHAPTER 5
EXTERNAL CONNECTIONS
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
5-1
GI 1.6882
EPAC 3100/3500
CONTENT
PAGE
5.1.
ANALOG INPUT CONNECTIONS ________________________________________________ 5-3
5.2.
INPUT AND OUTPUT CONTACTS CONNECTIONS __________________________________ 5-6
5.3.
POWER SUPPLY CONNECTIONS _______________________________________________ 5-10
5.4.
EQUIPMENT FAULT SIGNALLING CONNECTIONS _________________________________ 5-10
5.5.
COMMUNICATION OPTION CONNECTIONS ____________________________________ 5-10
5-2
EPAC 3100/3500
GI 1.6882
PAGE NOT USED
5-3
GI 1.6882
5.1.
EPAC 3100/3500
ANALOG INPUT CONNECTIONS
The current and voltage inputs are wired to pins 1 to 28 of the X5 connector on the EPAC rear
panel as indicated in figure 5.1a.
To maintain suitable EMC Electro-Magnetic-Compatibility margins provided with this product,
a state-of-art wiring and grounding is required.
We recommend the use of one multiwire (4 to 8 depending on the number of inputs used and
external neutral connection) cable of 4 mm2 for the voltage circuit and one multiwire (4 to 8
depending on external neutral connection) câble of 4 mm2 for 1 A current circuit or 6 mm2 for
5A current.
The external diameter of the cables is recommended as less than 15 mm. If the cables are
connected to cubicle terminals no shielding is required. If the cables are going out, cubicle
shielding of low HF impedance copper is to be provided with short strip large cross section
connections to ground at both ends. Unused wires are to be grounded at both ends.
As far as possible avoid mixing the voltage and current wires and other groups of wires.
The following diagrams show the analog input connections for the different types of zero
sequence current acquisition.
5-4
EPAC 3100/3500
P2
S2
GI 1.6882
P1
IL1
S1
P2
S2
P1
IL2
S1
P2
S2
IL3
P1
S1
UL1
P1 P2
S1
ILE1
ILS1 ILE2
ILS2 ILE3
ILS3
INS
INE
UL2
S2 S1
S2 S1
UL1 ULM
UL3
P1 P2
P1 P2
S2
UL2
UL3
To BCH
UbarreE
UbarreS ITMHE ITMHS
X5
Connector
IL1
IL2
IL3
IN
UL1
UL2
UBAR
UL3
TMH
Figure 5.1a: Analog input connections without zero sequence current transformer
Tore
P2
S2
P1
IL1
S1
P2
S2
P1
IL2
S1
P2
S2
IL3
P1
S1
UL1
P1 P2
UL2
P1 P2
UL3
P1 P2
To BCH
S1
ILE1
ILS1 ILE2
ILS2 ILE3
ILS3
INS
INE
UL1
S2 S1
ULM
S2 S1
UL2
S2
UL3
UbarreE
UbarreS ITMHE ITMHS
X5
Connector
IL1
IL2
IL3
IN
UL1
UL2
UL3
UBAR
TMH
Figure 5.1b: Analog input connections with zero sequence current transformer
5-5
GI 1.6882
EPAC 3100/3500
EPAC 3100/3500
TMH S
TMH E
U BarS
bar
U BarE
2
4
UL2
UL3
UN
UL1
6
8
10
12
16
INE
INS
INE
INS
18
IL E3
IL S3
If IN = 5A
20
IL E3
IL S3
If IN = 1A
22
IL E2
IL S2
If IN = 5A
24
26
IL
IL
IL
IL
28
IL E1
IL S1
14
X5
E2
S2
E1
S1
If IN = 5A
If IN = 1A
If IN = 1A
If IN = 5A
If IN = 1A
QTF Board
Screw-in
connector
Figure 5.1c: Analog input connections to the X5 connector
5-6
EPAC 3100/3500
5.2.
GI 1.6882
INPUT AND OUTPUT CONTACTS CONNECTIONS
Inputs and outputs contacts are connected to the screw-in LMI or ENTRELEC connectors at the
EPAC rear panel. The X1 and X2 connectors are used to connect the inputs/outputs of the
IO-1 board. The X3 and X4 connectors are used to connect the inputs/outputs of the additional
IO-1 or additional IO-2 board. To maintain suitable EMC margins provided with this product,
a state-of-art wiring and grounding is required.
The wire used must have a cross-section less than 2.5 mm2.
We recommend to use flexible multiwire (5 to 8 dependding on number of groups common)
cable of 1.5 or 2.5 mm2 for tripping contacts.
We recommend to use flexible multiwire (9 to 16 depending on number of groups common)
cable of 0.6 to 1.5 mm2 wire section for input contacts (for all pins of the X2 and X4 connectors
and pins 1 to 4 of the X1 and X3 connectors).
We recommend to use 1 or 2 multiwire (22 to 32 for 1 or 11 to 16 for 2 cables dependding
on number od groups common) cable of 0.6 to 1.5 mm2 wire section for signalling contacts (for
pins 13 to 28 of the X1 and X3 connectors).
The external diameter of cables is recommended as less than 15 mm.
If the cables are connected to cubicle terminals no shielding is required.
If the cables are going out cubicle shielding of low HF impedance copper is to be provide with
short strip large cross section connections to ground at both ends. Not used wires are to be
grounded at both ends.
5-7
GI 1.6882
EPAC 3100/3500
CONFIGURABLE
SIGNALLING
CONFIGURABLE
EPAC 3100/3500
CONTACTS (TC)
SIGNALLING
CONTACTS (TC)
2
TC 15
TC 01
2
4
TC 16
TC 02
4
6
Phase A tripping
TC 03
6
8
Phase B tripping
TC 04
8
10
Phase C tripping
TC 05
10
12
Closing by recloser
TC 06
12
14
TS 01
TC 07
14
16
TS 02
TC 08
16
18
TS 03
TC 09
18
20
TS 04
TC 10
20
22
TS 05
TC 11
22
24
TS 06
TC 12
24
26
TS 07
TC 13
26
28
TS 08
TC 14
28
CONFIGURABLE
LOGIC INPUTS (TS)
X1
IO-1 BOARD
Screw-in
Connector
X2
Screw-in
Connector
Figure 5.2a: Connections on the IO-1 Board
5-8
EPAC 3100/3500
GI 1.6882
CONFIGURABLE
SIGNALLING
EPAC 3100/3500
CONFIGURABLE
SIGNALLING
CONTACTS (TC)
CONTACTS (TC)
2
TC 15
TC 01
2
4
TC 16
TC 02
4
6
Phase A tripping
TC 03
6
8
Phase B tripping
TC 04
8
10
Phase C tripping
TC 05
10
12
Closing by recloser
TC 06
12
14
TS 01
TC 07
14
16
TS 02
TC 08
16
18
TS 03
TC 09
18
20
TS 04
TC 10
20
22
TS 05
TC 11
22
24
TS 06
TC 12
24
26
TS 07
TC 13
26
28
TS 08
TC 14
28
CONFIGURABLE
LOGIC INPUTS (TS)
X3
Additional IO-1 BOARD
Screw-in
Connector
X4
Screw-in
Connector
Figure 5.2b: Connections on the Additional IO-1 Board
5-9
GI 1.6882
EPAC 3100/3500
CONFIGURABLE
EPAC 3100/3500
SIGNALLING
CONFIGURABLE
SIGNALLING
CONTACTS (TC)
CONTACTS (TC)
2
TC 15
TC 01
2
4
TC 16
TC 02
4
6
Phase A tripping
TC 03
6
8
Phase B tripping
TC 04
8
10
Phase C tripping
TC 05
10
12
Closing by Recloser
TC 06
12
14
TC 07
14
16
TC 08
16
18
TC 09
18
20
TC 10
20
22
TC 11
22
24
TC 12
24
26
TC 13
26
28
TC 14
28
X3
IO-2 BOARD
Screw-in
Connector
X4
Screw-in
Connector
Figure 5.2c: Connections on the additional IO-2 Board
5-10
(ERRATUM)
EPAC 3100/3500
5.3.
GI 1.6882
POWER SUPPLY CONNECTIONS
The power supply PS is connected to the X6 screw-in connector on the rear panel. The wire
used must have a section less than 5 mm2. See 5.1. and 5.2. for wiring recommandations. Avoid
long distance wirings to DC source (less than 20-30 m) without special care.
27
28
- Power Supply
+ Power Supply
X6 Connector
Figure 5.3a: Power Supply Connections
5.4.
EQUIPMENT FAULT SIGNALLING CONNECTIONS
9
10
X6 Connector
15
16
X6 Connector
Figure 5.4a: Fault Signalling Connections
The equipment fault signal wires are connected to pins 9 and 10 of the X6 terminal block on
the IO-1 Board and to pins 15 and 16 of the X6 terminal block on the additional IO-1 Board
or the IO-2 Board.
5.5.
COMMUNICATION OPTION CONNECTIONS
The EPAC can be connected to three types of communication system:
-
Communication with an remote control system, either VDEW or KBUS-COURIER.
-
Reception of an external time synchronisation signal via an IRIG-B board.
-
Communication with the TPE system for disturbance event management. Communication is
by means of:
. a current loop for a link to a UR 2000 restitution unit,
. a Modem for a link to the TPE via the PSTN,
. RS232 for a direct link to the EPAC via the RS232 serial port on the EPAC front panel.
5-11
GI 1.6882
EPAC 3100/3500
Serial port for WinEPAC PC
Serial port for:
- WinV24
- or a local printer
Figure 5.5a: EPAC Front Panel Option Connections
X6
1
2
X1
X3
27
1
27
1
28
2
28
2
27
1
27
1
28
2
28
2
X5
27
28
27
1
X6
28
2
D24
X1
X3
X2
X4
X2
X4
X5
X30
D26
D25
X18
Current loop and
VDEW option
X20
Modem and
KBUS-COURIER
option
Figure 5.5b: EPAC Rear Panel Option Connections
X30 BNC connection
for IRIG-B time
synchronisation
signal
5-12
EPAC 3100/3500
Terminal
GI 1.6882
Description
Terminal
Description
X30 connector
X18 connector
BNC connector for
IRIG-B time
synchronisation
signal
Current loop
D24 connector
D26 connector
Ground
VDEW receiver
KBUS
D25 connector
X20 connector
VDEW transmitter
1
2
3
4
5
6
7
8
CD
RD
ED
DTR
0V
DSR
RTS
CTS
1
6
5
9
Modem
Figure 5.5c: Option Connector Connections
$
(3$&
abcd
3$*(12786('
(55$780
*,
