Areva T&D GHA series User manual

GAS-INSULATED SWITCHGEAR
GHA
Gas-Insulated Switchgear
Switchgear extension and
replacement of a panel
(During this work, essential parts of the
switchgear remain in operation)
No. AGS 535 066-01
Edition 02/2009
Technical Manual
AREVA T&D

AREVA T&D Worldwide Contact Centre
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Manufacturer:
AREVA Energietechnik GmbH – Sachsenwerk Medium Voltage
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D-93055 Regensburg, Germany
( [phone]
7 [phone]
Service:
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AREVA Energietechnik GmbH – Sachsenwerk Medium Voltage
Service-Center
D-93055 Regensburg, Germany
( [phone]
7 [phone]
© AREVA Energietechnik GmbH – Sachsenwerk Medium Voltage -2009-
All rights reserved to this technical manual.
Reproduction and making available of this technical manual, or extracts, to third parties are prohibited. Only integral reproduction of this
technical manual is permitted with the written permission from AREVA Energietechnik GmbH –Sachsenwerk Medium Voltage.
Electronic copies in e.g. PDF-format or scanned version have the status “for information only” .
The only valid version of this technical manual is always enclosed directly to the product in question by the factory.

3
Content
Remarks on this manual ............................................................. 4
Purpose ................................................................................................................................ 4
Reference documents ....................................................................................................... 4
Terms and symbols used .................................................................................................. 5
Abbreviations used ............................................................................................................ 5
Any questions or suggestions? ...................................................................................... 5
1 Safety provisions................................................................... 6
2 Panel description .................................................................. 7
3 Extension of an existing double busbar
switchgear system ............................................................... 9
3.1 Safety provisions.................................................................................................... 9
3.2 Important information ............................................................................................ 9
3.3 Initial situation .......................................................................................................10
3.4 Extension on left-hand end of busbar .............................................................11
3.5 Extension on right-hand end of busbar ..........................................................15
4 Replacement of a panel within a switchgear
system .....................................................................................20
4.1 Safety provisions..................................................................................................20
4.2 Important information ..........................................................................................20
4.3 Initial situation .......................................................................................................21
4.4 Fault in a busbar compartment .........................................................................22
5 Annex.......................................................................................33

4 GHA l Switchgear extension and replacement of a panel
Remarks on this manual
Purpose
This Technical Manual is for information only. It describes
extension of an existing GHA double busbar switchgear, at choice to the ●
left or right-hand side.
replacement of a switchgear panel within a GHA double busbar switch- ●
gear.
The switchgear is not switched OFF completely for the individual assembly
descriptions, but the busbar systems remain in operation as far as possible.
For the sake of clarity, this manual does not include all information on the
various assembly descriptions in detail. Neither can it take every imaginable
instance of installation or operation into account.
This Technical Manual only provides a general overview of the work to be
performed in case of extension or replacement. In each case of extension, a
detailed switchgear-specific workflow must be prepared upon consultation with
the manufacturer. No extension or replacement must be performed on the basis
of this Manual alone.
Liability claims against the manufacturer cannot be based on this Techni-
cal Manual!
As our products are subject to continuous further development, we reserve the
right to make changes regarding standards, illustrations and technical data.
Reference documents
The following additional documents must be complied with:
sales agreement with the stipulations regarding the switchgear-specific ●
equipment and the legal details
the switchgear-specific circuit diagrams / documentation ●
Operating Manual GHA (no. AGS 531 44 ●1-01)
Assembly Instructions GHA (no. AGS 531 44 ●6-01)
the operating instructions for the devices installed in the switchgear ●
(e. g. IVIS, devices in low-voltage cabinet)
the assembly instructions of the manufacturer of the cable connection ●
systems to be connected to the switchgear

5
Remarks on this manual
GHA l Switchgear extension and replacement of a panel
Terms and symbols used
This manual uses certain terms and symbols. They warn about dangers or
provide important information which must be complied with in order to avoid
danger to persons and damage to equipment:
„Warning“
This danger symbol warns about dangerous electrical voltage. Con-
tact with voltage may result in fatal injury!
„Warning“
This danger symbol warns about the risk of injury. Please comply
with all the provisions identified by this symbol in order to avoid
death or serious injury..
„Warning“
This danger symbol warns about the risk of falling.
„Important“
This instruction symbol is used for information which is important to avoid
material damage.
Abbreviations used
BB1 = Busbar 1 (rear busbar)
BB2 = Busbar 2 (upper busbar)
Any questions or suggestions?
Do you have any questions or suggestions regarding this manual, or do you
require further information?
We always strive to provide you with the best-possible information for optimum,
safe use of our products. Thus, do not hesitate to contact us if you have any
recommendations, amendments or proposals for improvement.

6 GHA l Switchgear extension and replacement of a panel
1 Safety provisions
This Technical Manual is for information only and is exclusively intended for
specialist electricians who have proven experience in conjunction with
the GHA series (training certificate) ●
the applicable safety provisions ●
●Common regulations for high-voltage switchgear and control gear: IEC
62271-1
The locally applicable accident prevention, operating and work instructions ●
must be complied with.
Installation: IEC 61936-1 / HD 637 S1 ●1
Operation of electrical equipment: EN 50110-1 ●1
1 The national standards applicable in the country where the equipment is to be
installed must be complied with.
Before performing work on the panel, it is essential that you comply with
the following instructions:
Warning:
Before starting work on high-voltage components, de-energize the
system, verify it for zero voltage and earth the system in accordance
with the applicable safety rules pursuant to EN 50110-1.
Warning:
After removal of covers, operator safety in accordance with IEC
62271-200 may be restricted if the appropriate part of the switchgear
has not been isolated from the power supply.
For the work described in this manual, operator safety from internal
arcs in accordance with the IAC classification is not ensured. Thus,
in the case of manual switching operations, persons may only be
located directly in front of the panels.
Optimum operator safety is only ensured if the switchgear is com-
pletely disconnected from the power supply and earthed during
extension or replacement of panels. Thus, attempts should be made
to achieve this switch condition at all times.
Warning:
Before performing work in the drive area of the switchgear panels,
switch off the supply voltage and prevent it from being switched ON
again.
Warning:
There is a risk of injury when working on the drive mechanism. Be-
fore commencing work, release the energy-storing device by
the OFF-ON-OFF (Open/Close/Open) operating sequence on the –
circuit-breaker
closing the make-proof –busbar earthing switch.
Warning!
The top sides of the panels are not meant to be walked on. Persons
may fall through them, get injured or may damage the panel. When
work has to be performed on the panel top, temporarily position a
solid base plate to step on.
Applicable standards and
regulations:

7GHA l Switchgear extension and replacement of a panel
1
2
7
3
4a
5
6
171819 16
8
9
10
12
13
14
15
11
1
2
Fig. 1
Outgoing feeder panel with outer cone-type cable connection
1 Gas density switch of the IDIS
systems for busbar 1 (rear busbar)
2 Busbar link BB1
3 Circuit-breaker tank with vacuum
interrupter chambers
4a Outer cone-type cable connection
5 Toroidal-core current transformer
6 Voltage transformer (optional)
7 Cable support
8 Cable compartment cover
9 Isolating device for voltage trans-
former (optional)
10 Capacitive voltage detection system
11 IDIS display unit for monitoring of
insulating gas
12 Hinged front frame
13 Manual operator interface
14 Low-voltage cabinet
15 Gas density switch of the IDIS sys-
tems for busbar 2 (upper busbar)
16 Busbar link BB2
17 Tank for busbar 2 (upper busbar)
with three-position switch
18 Jack rings
19 Tank for busbar 1 (rear busbar) with
disconnector
2 Panel description

8 GHA l Switchgear extension and replacement of a panel
2 Panel description
Warning!
Confusing the busbar system involves a risk of injury. The term
Busbar 1 (BB1) refers to the busbar arranged in the rear area of the
panel, and the term Busbar 2 (BB2) to the busbar arranged in the up-
per part of the panel.
On the mechanical operator interface, the standard designation for
the upper busbar is Busbar 1 and for the lower busbar, Busbar 2
(Fig. 2).
SS2
SS1
SS1
SS2
Fig. 2
Busbar assignment
BB1 Busbar 1 (rear busbar)
BB2 Busbar 2 (upper busbar)
BB1
BB2
BB1
BB2

9GHA l Switchgear extension and replacement of a panel
Extension of an existing double3
busbar switchgear system
Safety provisions3.1
Warning!
Comply with the safety provisions on page 6.
Warning!
Confusing the busbar system involves a risk of injury. The term
Busbar 1 (BB1) refers to the busbar arranged in the rear area of the
panel, and the term Busbar 2 (BB2) to the busbar arranged in the up-
per part of the panel.
During assembly, busbar 1 and busbar 2 must be identified clearly.
Earthed as well as energized busbars must be identified by the ap-
propriate warning and information signs.
Warning!
Risk of injuries. The mounted black end caps on the busbar ends
and the silicone sleeves of the busbar link are surge-proof and must
not be subjected to any mechanical stress.
Warning!
The initial position as shown, and the workflow described are in-
tended as examples only.
Before assembly is started, a complete description of the entire
workflow of a switchgear extension must be prepared and verified in
accordance with the local circumstances and conditions.
Important information3.2
The surge-proof black end caps and the silicone sleeves of the busbar ●
links are safe to touch due to an earthed external conductive surface.
Before positioning new panels, insert the busbar clamping contacts into ●
the busbar tubes of the left-hand panel concerned. Inserting the clamping
contacts after screw-fastening the panels would be very time-consuming.
The silicone link sleeves connecting the existing switchgear ●panel to the
extension panel may only be mounted on site.

10 GHA l Switchgear extension and replacement of a panel
3 Extension of an existing double busbar switchgear system
Initial situation3.3
GHA double busbar switchgear panels can be extended at choice to the left or
right sides.
Both busbar systems are operating ●
One busbar system alternately remains in operation during extension work. ●
Wall-mounting ●
SS 2
SS 1
12589
Fig. 3
The diagram shows a 9-panel switchgear consisting of
– 2 incoming feeder panels (panels 1 and 9)
– bus coupler (panel 5)
– 6 outgoing feeder panels (shown as an example: panels 2 and 8)
BB1 Busbar 1 (arranged at the rear of the panel)
BB2 Busbar 2 (arranged at the top of the panel)
BB1
BB2

11
3 Extension of an existing double busbar switchgear system
GHA l Switchgear extension and replacement of a panel
Extension on left-hand end of busbar3.4
Reroute all incoming and outgoing feeder panels to busbar 2 (Fig. 4).1.
Isolate busbar 1 from the power supply and earth it (the diagram shows 2.
busbar earthing via the bus coupler, Fig. 4; see also Operating Manual,
chap. 6.7).
Warning!
Risk of injuries! The upper busbar (BB2) is in operation and the rear
busbar (BB1) earthed. Comply precisely with the safety provisions.
SS 2
SS 1
12589
BB2 (top)
BB1 (rear)
Fig. 4
All incoming and outgoing feeder panels on busbar 2, busbar 1 earthed with the bus
coupler
Remove left-hand gap cover and end plate and attach busbar identifica-3.
tions.
Remove left-hand metallic protective covers of busbars 1 and 2.4.
5. Remove left-hand end caps of busbar 1 (rear). Clean and grease busbar
bushings on panel 1. Clean, grease and mount silicone sleeves of link (see
Assembly Instructions).
Clean the removed busbar end caps of busbar 1 and reposition them
on the new end panel (see also space assignment plan), unless they are
already provided. Mount metallic protective cover to the new end of
busbar 1.
Line up new panel
BB1
BB2

12 GHA l Switchgear extension and replacement of a panel
3 Extension of an existing double busbar switchgear system
Treat all new contact surfaces in accordance with the Assembly Instruc-6.
tions. Treat the new busbar clamping contacts for both busbar systems in
accordance with the Assembly Instructions and insert them into the new
panel (busbar tubes) to be lined up (Fig. 5, item 1). Position panel on the
base frame in accordance with the space assignment plan.
SS2
SS1
12589
1
BB2 (top)
BB1 (rear)
Fig. 5
New panel lined-up on the left-hand end
– busbar 1 (rear) completely connected and ready to operate (protective cover on
busbar end not shown)
– busbar 2 (top) not yet connected
1 Busbar clamping contacts
Align new panel and screw-fasten it to the adjacent panel and the base 7.
frame (see Assembly Instructions).
Mount busbar connection for busbar 1 completely with clamping contacts 8.
(see Assembly Instructions) (Fig. 5).
If applicable, mount further panels in accordance with items 6 - 7. Mount 9.
both busbar systems BB1 and BB2 completely on the new panels (see
Assembly Instructions).
BB1
BB2

13
3 Extension of an existing double busbar switchgear system
GHA l Switchgear extension and replacement of a panel
The further steps for assembly are to be performed in accordance with the 10.
Assembly Instructions:
connect the earth bars –
connect the low-voltage cables (ring lines, external customer cables) –
Commission extension panels: –
comply with Assembly Instructions (Chapter 10) –
check operating functions and interlocks of switching devices –
Set extension panels to – „EARTHED“ position (Fig. 6).
Reroute panels to 11. BB1:
Warning!
For safety reasons, all persons must be located in front of the
switchgear during switching operations!
Cancel – BB1 earthing.
Switch bus coupler ON. –
Reroute panels to – BB1.
Isolate busbar 2 from the power supply and earth it (the diagram shows 12.
busbar earthing via the bus coupler, Fig. 6; see Operating Manual, chap.
6.7).
SS2
SS1
12589
Fig. 6
New panel earthed, all incoming and outgoing feeder panels on busbar 1, busbar 2
earthed via the bus coupler
Warning!
Risk of injuries. Now, the rear busbar (BB1) is in operation and the
upper busbar (BB2) earthed. Comply precisely with all safety provi-
sions and check the busbar identifications.
Remove busbar end caps of busbar 2 (top) and clean and grease all bus-13.
bar bushings.
Clean and grease silicone link sleeve, insert it under preload and mount it
to the right on the panel.
BB1
BB2

14 GHA l Switchgear extension and replacement of a panel
3 Extension of an existing double busbar switchgear system
On the new panels, mount all upper busbar links of the 14. BB2 completely in
accordance with the Assembly Instructions (Fig. 7).
SS2
SS1
12589
BB2 (top)
BB1 (rear)
Fig. 7
New panel connected to the two busbars
Busbar 1 in operation
Busbar 2 still earthed, but ready to operate
(protective covers on busbar end not shown)
Remount the removed busbar end cap on the new end panel (unless 15.
already provided).
Mount metallic protective cover to the new busbar end.
All the other assembly steps are to be performed in accordance with the
Assembly Instructions:
mount left-hand end plate and gap cover. –
high-voltage terminals –
final steps –
BB1
BB2

15
3 Extension of an existing double busbar switchgear system
GHA l Switchgear extension and replacement of a panel
Extension on right-hand end of busbar3.5
1. Reroute all incoming and outgoing feeders to busbar 1 (Fig. 8).
SS 2
SS 1
12589
BB2 (top)
BB1 (rear)
Fig. 8
All incoming and outgoing feeder panels on busbar 1, busbar 2 earthed via the bus
coupler
Isolate busbar 2 from the power supply and earth it (the diagram shows 2.
busbar earthing via the bus coupler, Fig. 8; see also Operating Manual,
chap. 6.7).
Warning!
Risk of injuries. The rear busbar (BB1) is in operation and the upper
busbar (BB2) earthed. Comply precisely with the safety provisions.
Remove right-hand gap cover and end plate and attach busbar identifica-3.
tions.
Remove right-hand metallic protective covers of busbars 1 and 2.4.
Remove right-hand end caps of busbar 2 (top). Treat new busbar clamp-5.
ing contacts in accordance with the Assembly Instructions and insert them
into BB2 of panel 9.
Clean and grease busbar bushings and the removed end caps, and re-6.
mount them.
BB2 is ready to operate again.
Preparation
BB1
BB2

16 GHA l Switchgear extension and replacement of a panel
3 Extension of an existing double busbar switchgear system
Reroute all outgoing feeders to busbar 2 (Fig. 9).7.
SS 2
SS 1
12589
BB2 (top)
BB1 (rear)
Fig. 9
All incoming and outgoing feeder panels on busbar 2, busbar 1 earthed via the bus
coupler
Isolate busbar 1 from the power supply and earth it (the diagram shows 8.
busbar earthing via the bus coupler, Fig. 9; see also Operating Manual,
chap. 6.7).
Warning!
Risk of injuries. The upper busbar (BB2) is in operation and the rear
busbar (BB1) earthed. Comply precisely with all safety provisions
and check the busbar identifications.
Remove right-hand end caps of busbar 1 (rear). Clean and grease busbar 9.
bushings. Clean and grease silicone sleeves of link and mount them on the
new panel (see Assembly Instructions).
Clean the removed end caps of busbar 1 and reposition them on the 10.
new end panel (see also space assignment plan), unless they are already
provided.
Mount metallic protective cover to the new end of busbar 1.
Treat all contact surfaces in accordance with the Assembly Instructions.
Insert the new busbar clamping contacts into BB1 of panel 9.
BB1
BB2

17
3 Extension of an existing double busbar switchgear system
GHA l Switchgear extension and replacement of a panel
11. Position new panel on the base frame in accordance with the space as-
signment plan, align it and screw-fasten it to the adjacent panel and the
base frame (see Assembly Instructions).
Mount busbar connection for busbar 1 completely with clamping contacts 12.
(see Assembly Instructions) (Fig. 10).
SS2
SS1
12589
BB2 (top)
BB1 (rear)
Fig. 10
– New panel lined-up on the right-hand end
– Busbar 1 (rear) completely connected and ready to operate (protective cover on
busbar end not shown)
– Busbar 2 (top) not yet connected
If applicable, mount further panels in accordance with item 11. Mount both 13.
busbar systems BB1 and BB2 completely to the new panels (see Assem-
bly Instructions).
Line up new panel
BB1
BB2

18 GHA l Switchgear extension and replacement of a panel
3 Extension of an existing double busbar switchgear system
The further steps for assembly are to be performed in accordance with the 14.
Assembly Instructions:
connect the earth bars –
connect the low-voltage cables (ring lines, external customer cables –
Commission extension panels:
comply with Assembly Instructions (Chapter 10) –
check operating functions and interlocks of switching devices –
Set extension panels to „EARTHED“ position (Fig. 11).
SS2
SS1
12589
Fig. 11
New panel earthed, all incoming and outgoing feeder panels on busbar 1, busbar 2
earthed via the bus coupler
Reroute panels to 15. BB1:
Warning!
For safety reasons, all persons must be located in front of the
switchgear during switching operations!
Cancel – BB1 earthing.
Switch bus coupler ON. –
Reroute panels to – BB1.
Isolate busbar 2 from the power supply and earth it (the diagram shows 16.
busbar earthing via the bus coupler, Fig. 11; see Operating Manual, chap.
6.7).
Warning!
Risk of injuries. Now, the rear busbar (BB1) is in operation and the
upper busbar (BB2) earthed. Comply precisely with all safety provi-
sions and check the busbar identifications.
Remove busbar end caps of busbar 2 and clean and grease all busbar 17.
bushings.
Clean and grease silicone link sleeve, insert it under preload and mount it
to the right on the panel.
BB1
BB2

19
3 Extension of an existing double busbar switchgear system
GHA l Switchgear extension and replacement of a panel
On the new panels, mount all upper busbar links of the 18. BB2 completely in
accordance with the Assembly Instructions (Fig. 12).
SS2
SS1
12589
BB2 (top)
BB1 (rear)
Fig. 12
New panel connected to the two busbars
Busbar 1 in operation
Busbar 2 still earthed, but ready to operate
(protective covers on busbar end not shown)
Remount the removed busbar end cap on the new end panel (unless 19.
already provided).
Mount metallic protective cover to the new busbar end.
All the other assembly steps are to be performed in accordance with the
Assembly Instructions:
attach right-hand end plate and gap cover. –
high-voltage terminals –
final steps –
BB1
BB2

20 GHA l Switchgear extension and replacement of a panel
Replacement of a panel within a4
switchgear system
Safety provisions4.1
Warning!
Comply with the safety provisions on page 6 and 8.
Warning!
Confusing the busbar system involves a risk of injury. The term
Busbar 1 (BB1) refers to the busbar arranged in the rear area of the
panel, and the term Busbar 2 (BB2) to the busbar arranged in the up-
per part of the panel.
During replacement, busbar 1 and busbar 2 must be identified
clearly on the adjacent panels.
Earthed as well as energized busbars must be identified by the ap-
propriate warning and information signs.
Warning!
Risk of injuries. The mounted black end caps on the busbar ends
and the silicone sleeves of the busbar link are surge-proof and must
not be subjected to any mechanical stress.
Warning!
The initial position as shown, and the workflow described are in-
tended as examples only.
Before assembly is started, a complete description of the complete
workflow of a switchgear replacement must be prepared and com-
plied with in accordance with the local circumstances and condi-
tions.
Important information4.2
The surge-proof black end caps and the silicone sleeves of the busbar ●
links are safe to touch due to an earthed external conductive surface.
Before positioning new panels, insert the busbar clamping contacts into ●
the busbar tubes of the left-hand panel concerned. Inserting the clamping
contacts after screw-fastening the panels would be very time-consuming.
The silicone link sleeves connecting the existing switchgear to the exten- ●
sion panel may only be mounted on site.