gas-insulated switchgear - schneider...

L1 L2 L3

GAS-INSULATED SWITCHGEAR

Technical Instructions

Operating Instructions

No. AGS 532 521-01

Edition 09/07

GMAPanels with double busbar

AREVA T&D

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(Supplement to Operating Instructions AGS 531 521-01)

AREVA T&DWorldwide Contact Centre

http://www.areva-td.com/contactcentre/℡ +44 (0) 1785 250 070

Manufacturer:

Rathenaustrasse 2D-93055 Regensburg, Germany℡ +49 (0) 9 41 / 46 20-0� +49 (0) 9 41 / 46 20-418

Service:Should you have any queries as to ourservice, please do not hesitate to con-tact:

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AREVA Energietechnik GmbHSachsenwerk Medium Voltage

AREVA Energietechnik GmbHSachsenwerk Medium Voltage

© AREVA Energietechnik GmbH, Sachsenwerk Medium Voltage -2007-All rights reserved to this technical instruction.Reproduction and making available of this technical instruction, or extracts, to third parties are prohibited. Only the complete reproduc-tion of this technical instruction is permitted by written permission from AREVA Energietechnik GmbH, Sachsenwerk Medium Voltage.Electronic copies, e.g. as PDF format or as scanned version, have the status “for information only”. The only valid technical instructions are those which are supplied directly from the manufacturer with the delivery of the product.

Contents

1. Regulations and provisions 41.1 Remarks on these instructions 41.2 Terms and symbols used 41.3 Use in the line with the intended purpose 41.4 Applied standards 51.5 Safety provisions 61.6 Disposal after the end of service life 6

2 Overview of variants GMA double busbar 7

2.1 Design of GMA double busbar panels 72.2 Cable feeder panels with one circuit-breaker 82.3 Combination cable feeder / bus coupler 92.4 Bus coupler 92.5 Bus section coupler 9

3 Operation 103.1 Operator interfaces for manual operation 103.2 Interlocking 163.3 Important guidelines for switching operations 173.4 Operation 173.5 Standard switching operations 183.6 Earthing the busbar 233.7 Earthing the current conductors between main

and opposite panels 25

4 Operating the voltage transformerdisconnecting device 26

4.1 Take off the cable compartment cover 264.2 Disconnecting device for voltage transformers 26

5 Cable testing 27

3

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1 Regulations and provisions

1.1 Remarks on these in-structions

These Technical Instructions are asupplement to the Operating Instruc-tions GMA (AGS 531 521-01) anddescribe the operation of panelsused in GMA double busbar installa-tions. The following chapters of theseOperating Instructions apply also forthis supplement without restriction:

Ch. 2: Technical DataCh. 4: Insulating gas, monitoringCh. 5: Voltage detecting systemsCh. 10: MaintenanceCh. 11: Annex

These instructions are an integralpart of the product and must bestored so that they are at any timereadily accessible for and can beused by persons who are to work onthe switchgear. If the switchgear issold to new owners, they must re-ceive this document along with theswitchgear.

The following additional documentsmust be observed for thisswitchgear:• Purchase contract with the agree-

ments on the configuration of theswitchgear and with legal details

• The appropriate installation specific circuit diagrams / documentation

• Operating Instructions GMA AGS 531 521-01

• Installation Instructions GMA AGS 531 526-01

• The operating instructions of thedevices installed in the switchgear(e.g. IVIS, devices in low-voltagecabinet)

• The installation instructions of thehigh voltage cable connection sys-tem provided by the manufacturerof this system

• The switchgear configuration doc-ument “GMA”

• The Technical Instructions “Use and handling of insulatinggas” for GMA (can be requestedas required)

Since our products are constantlyimproved, changes concerning im-ages, technical data and standardsare reserved.

1.2 Terms and symbolsused

These technical instructions use cer-tain symbols which warn about dan-ger or provide important informationwhich must be complied with toavoid danger to personnel and dam-age to equipment:

Warning!This warning symbol in-dicates dangerous electrical voltage.

Contact with voltage may resultin fatal injury!

Warning!This warning symbolindicates danger of injury. Observe all in-

structions that are labelled withthis sign to avoid death or seri-ous injury.

Important!This notice symbol is usedfor information which is im-portant to avoid damage.

1.3 Use in the line withthe intended purpose

Medium-voltage gas-insulatedswitchgear type GMA are exclusivelyintended for switching and distribut-ing electrical power. They must onlybe used in the scope of the specifiedstandards and the appropriate instal-lation specific technical data. Anyother use constitutes improper useand may result in dangers and dam-age.

Disclaimer of liability

The manufacturer shall not be heldresponsible for damage which oc-curs if• instructions in this manual are not

complied with• the switchgear is not operated ac-

cording to its intended use (see above),

• the switchgear is installed, con-nected or operated improperly,

• accessories or spare parts areused which have not been ap-proved by the manufacturer,

• the switchgear is modified withoutthe approval of the manufacturer,or if inadmissible parts are at-tached.

No liability is accepted for parts pro-vided by customers, e.g. currenttransformers.

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4

Switchgear type GMA meet the following standards and regulations:1.4 Applied standards

Switchgear type GMA are

• metal-enclosed

• SF6-insulated

• type tested

• tested for internal arc faults

• designed for indoor installation

Designation IEC-Standard EN-Standard

Switchgear IEC 62271-200IEC 60694

EN 62271-200EN 60694

Internal Arc Classification (IAC) IEC 62271-200 EN 62271-200

Circuit-breaker IEC 62271-100 EN 62271-100

Earthing switch IEC 62271-102 EN 62271-102

Disconnector IEC 62271-102 EN 62271-102

Current transformer IEC 60044-1 EN 60044-1

Voltage transformer IEC 60044-2 EN 60044-2

Voltage detecting systems IEC 61243-5 EN 61243-5

Protection against accidentalcontact, foreign objects, water

IEC 60529 EN 60529

Installation IEC 61936-1 HD 637 S1

Operation of electrical installations - EN 50110

Insulating gas sulphur hexafluoride (SF6)

IEC 60376 EN 60376

GMA is an indoor switchgear andmay only be operated under normaloperating conditions according tospecifications of IEC 60694.

Operation under conditions deviatingfrom these is only admissible uponconsultation with and approved bythe switchgear manufacturer.

5

Environmental and operating conditions

Degrees of protection (acc. to IEC 60529)

Main electrical circuits IP 65

Operating mechanisms IP 2X 2)

Low-voltage cabinet IP 3X 3)

Cable cabinet IP 3X

Ambient conditions (acc. to IEC 60694)

Temperature class “minus 5 indoor” 1)

Ambient temperature min./max. ºC -5 / 40 1)

Average value within 24 hours ºC ≤ 35 1)

Average rel. air humidity 24 h/1 month % ≤ 95 / ≤ 90 1)

Max. installation altitude above sea level m ≤ 1000 1)

1) Higher values upon request

2) option IP 5X3) option IP 52

Works described in these instruc-tions may only be performed by fullyskilled and well experienced electri-cians. They must have sound know-ledge about switchgear type GMAand all relevant safety provisions.

Relevant standards and regulations:

Comply with:• the locally applicable health and

safety, operating and work instruc-tions

• Installation 1):IEC 61936-1 / HD 637 S1

• Operation of electrical installa-tions 1): EN 50110-1

1) Comply with the national stan-dards which are valid in the countryof installation.

Read these instructions carefully be-fore you work on the switchgear, andperform the work as described. Onlyperform such work if you have under-stood the instructions. Do not per-form any work on the switchgearwhich is not described here.

Important!Operating reliability andservice life depend on correct operation.

Before performing work on the panel,make sure to comply with the follow-ing instructions:

Warning!Before starting work onthe high-voltage com-ponents, de-energize

the system, verify it for zerovoltage and earth the systemaccording to the applicablesafety rules according toEN 50110-1.

Warning!After removal of covers,operator safety acc. toIEC 62271-200 may be

restricted. De-energize the ap-propriate part of the switchgearbefore starting work.

Warning!Before performing workon operating mecha-nisms, switch off the

supply voltage and prevent itfrom reclosing.

Warning!Risk of injury whenworking on operatingmechanisms. Discharge

the mechanism’s energy stor-age by performing the neces-sary • OFF-ON-OFF operating

sequence at the circuit-breaker

• closing operation at themake-proof earthing switch.

Behaviour in case of incidents oraccidents

The panels type GMA feature pres-sure relief ports for the case of an in-ternal arc fault; these ensureoperator safety according to IEC 62271-200.

In case of fire or of internal faults,toxic and caustic decompositionproducts may arise. Comply with thelocally applicable health and safetyprovisions.

In case of injuries take first-aid measures or cause them to be taken.

1.6 Disposal after the endof service life

The following documents can be pro-vided on request for the disposal ofseries GMA switchgear at the end oftheir service lives:

- Technical Instruction “Use andhandling of insulating gas SF6”

- Material and recycling data sheet

Disposal at the end of service life isperformed as a service by the manu-facturer’s Service Center which issubject to a fee.

6

1.5 Safety provisions

2 Overview of variants GMA doublebusbar>>

L1 L2 L3

14

13

11

12

9

10

Phase sequencecable connection

L1 L2 L3

7 4 8

L1 L2 L3

1 3 2

Phase sequencecurrent conductor system

6

15

5

Phasesequencebusbar 2

Phasesequencebusbar 1

L1L2L3

L1 L2 L3

2.1 Design of GMA double busbar panels

7

BB2BB1

Figure 2.1 Cable feeder panel with one circuit-breaker1 Main panel with busbar system 12 Opposite panel with busbar

system 2 3 Current conductor system connect-

ing both panels4 Cable connection5 Bushings for busbar coupling (bus-

bar coupling tank)

6 Operator interface of the oppositepanel (manual operation)

7 Adjustable cable support8 Earthing conductor9 Cable compartment cover10 Operator interface of the main panel

(Manual Operation)11 Control device for electrical opera-

tion

12 Voltage detecting system at thecable connection

13 Pressure gauge (temperature compensated)

14 Low-voltage cabinet15 Cable duct for low-voltage cabling

between the panels

Description of the panels

Double busbar panels of type GMAalways consist of two single panelsin a “back-to-back configuration”with a main panel and an oppositepanel.

The following panel variants for GMAdouble busbar installations are avail-able:• Cable feeder panel with one cir-

cuit-breaker• Combination cable feeder / bus

coupler with 2 circuit-breakers• Bus coupler• Bus section coupler

Main and opposite panels are con-nected by a current conductor sys-tem with a single-phase insulation.The current conductors are pluggedto the outer-cone bushings accord-ing to EN 50181, type C, which areimplemented into the panels.

Main panel with busbar 1:– Disconnector– Circuit-breaker– Earthing switch– Toroidal-core current transformer– Coupling capacitor– Outer-cone cable bushing accord-

ing to EN 50181, type C, for max.triple cable connection or doublecable connection with surge ar-rester

Opposite panel with busbar 2:– Disconnector– Earthing switch (option)

Important!The phase sequence inopposite panels is from leftto right L3 - L2 - L1, deter-

mined by the different design com-pared to main panels !

In opposite panels phases L1 and L3are always changed between the dis-connector and busbar system 2.As a result the phase sequence ofbusbar 2 is L1 - L2 - L3 regardedfrom the panel front to the backwhich is the same phase sequenceof the main panels.

Thus single panels or modules canbe attached to the left or the right ofmain panels as well as of oppositepanels to extend the switchgear withsingle busbar panels.

Optional features:• Opposite panels can be equipped

with an additional earthing switch.In this way the terminals of the cur-rent conductor system connectingboth panels can be earthed in bothpanels.

• The combination cable feeder /bus coupler can be equipped withvoltage transformers at the feederside.The voltage transformers includinga disconnecting device are instal-led in opposite panels behind thecable compartment cover.

• Additionally voltage transformerscan be installed for busbar meas-urement (see Installation Instruc-tions, chapter 5.1).

8

Figure 2.2Cable feeder panel with one circuit-breaker.Main panel (left) with BB1: Disconnector, circuit-breaker, earthing switchOpposite panel (right) with BB2: Disconnector, earthing switch (option)

SS1 SS2 SS2SS1

2.2 Cable feeder panels with one circuit-breaker

9

Main panel with busbar 1:– Disconnector– Circuit-breaker– Earthing switch– Toroidal-core current transformer– Coupling capacitor– Outer-cone cable bushing accord-

ing to EN 50181, type C, for max.triple cable connection or doublecable connection with surge ar-rester

Opposite panel with busbar 2:– Disconnector– Circuit-breaker– Earthing switch– Voltage transformer with discon-

necting device (option)

2.4 Bus coupler

Main panel with busbar 1:– Disconnector– Circuit-breaker– Earthing switch

Opposite panel with busbar 2:– Disconnector– Earthing switch

2.5 Bus section coupler

The bus section coupler panels for“back-to-back configuration” areidentical to those for single busbarinstallations because there is no linkbetween the busbars.

BB1 BB2 BB2BB1

Figure 2.3Combination cable feeder / bus coupler.Main panel (left) with BB1: Disconnector, circuit-breaker, earthing switchOpposite panel (right) with BB2: Disconnector, circuit-breaker, earthing switch,

voltage transformer with disconnecting device

Figure 2.4GMA double busbar, bus coupler.Main panel (left) with BB1: Disconnector, circuit-breaker, earthing switchOpposite panel (right) with BB2: Disconnector, earthing switch

BB1 BB2 BB2BB1

2.3 Combination cable feeder / bus coupler

Figure 3.1Operator interfaces for cable feeder panels with one circuit-breakerMain panel (top) with busbar 1: Disconnector, circuit-breaker, earthing switchOpposite panel (bottom) with busbar 2:Disconnector

3 Operation

The following figures show the twooperator interfaces of a double bus-bar panel together belonging to themain panel and to the oppositepanel.

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1

2

345

78 9

101112

14

6

13

19

18

20

151617

21

Main panel:1 Nameplate2 Opening for operation of the discon-

nector3 Position indicator of the disconnector4 Position indicator of the energy stor-

age CHARGED/DISCHARGED5 Position indicator circuit-breaker6 Push button circuit-breaker OFF7 Push button circuit-breaker ON8 Counter for number of operations9 Opening for hand crank to charge the

energy storage of the circuit-breaker10 Interlocking slide for cable compart-

ment cover11 Position indicator of the earthing

switch12 Electrical position indicator of the dis-

connector in the opposite panel13 Opening for operation of the earthing

switch14 Mechanical interlocking of the open-

ings for disconnector/earthing switchoperation (slide)

15 Busbar 216 Busbar 117 Mechanical lock to prevent operation

Opposite panel:18 Position indicator of the disconnector19 Mechanical interlocking of the open-

ings for disconnector operation(slide)

20 Opening for operation of the discon-nector

21 Diagram of the switching devices inthe main panel

3.1.1 Cable feeder panel with one circuit-breaker

3.1 Operator interfaces for manual operation

10

BB2

BB1

11

As an option the opposite panel canbe delivered with an additional earth-ing switch on customer request.In this way both outer-cone bushingsfor the current conductors, whichconnect main and opposite panel,can be earthed separately.

Compared to Fig. 3.1 the followingadditional elements have beenadded:

Main panel:22 Electrical position indicator of the

earthing switch in the opposite panel

Opposite panel:23 Position indicator of the earthing

switch24 Opening for operation of the earthing

switch

Figure 3.2Operator interfaces for cable feeder panels with one circuit-breakerMain panel (top) with busbar 1:Disconnector, circuit-breaker, earthing switchOpposite panel (bottom) with busbar 2:Disconnector, earthing switch (option)

22

23

24

Cable feeder panel with additional earthing switch

BB2

BB1

The combination cable feeder / buscoupler is equipped with circuit-breaker, disconnector and earthingswitch in the main panel as well as inthe opposite panel.

Figure 3.3Operator interfaces for combination cable feeder / bus cou-plerMain panel (top) with busbar 1:Disconnector, circuit-breaker, earthing switchOpposite panel (bottom) with busbar 2:Disconnector, circuit-breaker, earthing switch

12

1

2

3

910

1213

1617

45

78

6

15

28

25

29

14

2627

1819

2021

2324

22

30

11

31




energy storage of the circuit-breaker10 Interlocking slide for cable compart-

ment cover11 Electrical position indicator circuit-

breaker in the opposite panel12 Position indicator of the earthing


connector in the opposite panel14 Electrical position indicator of the

earthing switch in the opposite panel15 Opening for operation of the earthing




Opposite panel:20 Position indicator of the energy stor-

age CHARGED/DISCHARGED21 Position indicator circuit-breaker22 Push button circuit-breaker OFF23 Push button circuit-breaker ON24 Counter for number of operations25 Position indicator of the disconnector26 Position indicator of the earthing






31 Interlocking slide for cable compart-ment cover

3.1.2 Combination cable feeder / bus coupler

BB2

BB1

The operator interface of the mainpanel is not equipped with an electri-cal position indication of the switch-ing devices in the opposite panel.

The operator interface matches Fig. 3.3 with one modification:

Main panel:31 Diagrams of the switching devices in

the opposite panel instead of electri-cal position indicators.

Figure 3.4Operator interfaces for combination cable feeder / bus cou-plerMain panel (top) with busbar 1:Disconnector, circuit-breaker, earthing switchOpposite panel (bottom) with busbar 2:Disconnector, circuit-breaker, earthing switch

13

31

Variant without electrical position indicators

BB2

BB1

3.1.3 Bus coupler

The bus coupler connects or discon-nects the busbar systems 1 and 2. The position of the switching devicesin the opposite panel is displayed onthe operator interface of the mainpanel by electrical position indica-tors.

Figure 3.5Operator interfaces for double busbar bus couplerMain panel (top) with busbar 1: Disconnector, circuit-breaker, earthing switchOpposite panel (bottom) with busbar 2: Disconnector, earthing switch

14

1

2

345

78 9

1011

14

6

13

21

18

22

151617

23

12

1920




energy storage of the circuit-breaker10 Position indicator of the earthing


connector in the opposite panel12 Electrical position indicator of the

earthing switch in the opposite panel13 Opening for operation of the earthing




Opposite panel:18 Position indicator of the disconnector19 Position indicator of the earthing






BB2

BB1

3.1.4 Bus section coupler

SS1

SS2

15

Figure 3.6Operator interfaces for bus section coupler of busbar system 1Circuit-breaker panel on the left with disconnector, circuit-breaker and earthing switchRiser panel on the right with disconnector and earthing switch

SS1

SS2

Figure 3.7Operator interfaces for bus section coupler of busbar system 2Circuit-breaker panel on the left with disconnector, circuit-breaker and earthing switchRiser panel on the right with disconnector and earthing switch

BB2

BB1

BB2

BB1

The design is the same as of bus section couplers in single busbar installations. There is an operator interface for busbarsystem 1 and an operator interface for busbar system 2.

3.2 Interlocking

Table for mechanical interlocking within a panel:

16

Important!Comply with the purchasecontract and the installationspecific documentation andcircuit diagrams.

Important!If no blocking coils to pre-vent maloperation are used,mechanical locking by

cylindrical locks or padlocks ismandatory (see chapters 6.2.2 and6.2.3).

Additional interlocking:For the interlocking in main panelsand opposite panels of double bus-bar installations applies the followinginformation in the Operating Instruc-tions AGS 531 521-01:

• Mechanical locks to prevent man-ual operation- by cylinder lock,

chapter 6.2.2 (option)- by padlock,

chapter 6.2.3 (option)• Electromagnetic interlocking:

This kind of interlocking can be im-plemented according to customerrequest.

Switching device Position Interlocking condition towards

Circuit-breaker Disconnector Earthing switch Cable compart-ment cover

Circuit-breaker “ON” - not interlocked incable feeder panels with onecircuit-breaker

interlocked in all other kind ofpanels

not interlocked ifdisconnector“OFF”

not interlocked ifearthing switch“ON”

interlocked ifearthing switch“ON”

interlocked ifearthing switch“OFF”

“OFF” - interlocked ifearthing switch“ON”

not interlocked ifdisconnector“OFF”

not interlocked ifearthing switch“ON”

not interlocked ifearthing switch“OFF”

interlocked ifdisconnector“ON”

interlocked ifearthing switch“OFF”

Disconnector “ON” not interlocked - interlocked interlocked ifearthing switch“OFF”

“OFF” not interlocked - not interlocked interlocked ifearthing switch“OFF”

Earthing switch “ON” not interlocked interlocked - not interlocked

“OFF” not interlocked not interlocked - interlocked

Cable compartmentcover

taken off not interlocked interlocked interlocked -

inserted - - not interlocked ifdisconnector“OFF”

-

See Operating Instructions GMAAGS 531 521-01, chapter 6.3.

3.4 Operation

Warning!Danger of serious injurydue to mistake in iden-tifying the position of

the busbar!The busbar in main panels isnamed busbar 1 (BB1) and thebusbar in opposite panels isnamed busbar 2 (BB2).During operation a clear label-ling of busbar 1 and busbar 2 ismandatory.

Electrical position indicators:The electrical position indicators in-stalled in main panels show the posi-tion of the switching devices in theopposite panels. The electrical position indicators pro-vide the following information:

Electrical operation:GMA double busbar panels can beoperated by a control device in-stalled in the low-voltage cabinet ofthe main panel, depending on thedegree of motorization of the switch-ing devices.

Important!Comply with the installationspecific documentation de-scribing the remote control

of the switching devices.

Manual operation:The switching devices are operatedmanually at the operator interfaces ofthe specific panel.The switching devices of main panelsare operated at the installation’s mainoperating front. The switching de-vices in opposite panels are oper-ated at the opposite front.The operation of the different switch-ing devices - circuit-breaker- disconnector- earthing switchare described in the Operating In-structions GMA.

Important!Comply with chapter 6.4"Switching - Circuit-brea-ker panel" of the Operating

Instructions AGS 531 521-01.

17

3.3 Important guidelines for switching operations

Horizontal bar:Switching device OFF

Vertical bar:Switching device ON

Bar 45º:Switching device not in endposition or supply voltage ofindicator is down

Warning!Comply with all relevantsafety provisions duringswitching operations.

3.5.1 Switching the feeder panel

Cable feeder panel with one cir-cuit-breaker

Initial condition is feeder EARTHED:

Main panel with BB1:- Circuit-breaker: OFF- Disconnector BB1: OFF- Earthing switch: ONOpposite panel with BB2:- Disconnector BB2: OFF

Connect feeder to BB2 (Fig. 3.9 shows the final condition):1. Switch earthing switch (A) OFF2. Switch disconnector BB2 (B) ON

(at opposite panel)3. Switch circuit-breaker (C) ON

The feeder is earthed by carrying outthe operations vice versa (Fig. 3.8shows the final condition).

Connect feeder to BB1 (Fig. 3.10 shows the final condition):1. Switch earthing switch (A) OFF2. Switch disconnector BB1 (D) ON

(at the main panel)3. Switch circuit-breaker (C) ON


Definition of terms:BB1 (= busbar 1) is used to desig-nate switching devices in main pan-els.BB2 (= busbar 2) is used to desig-nate switching devices in oppositepanels.

Important!The switching operationsare always pictured point-ing at the position indica-

tors of the operator interfaces in themain panels.

3.5 Standard switching operations

BB2

BB1

BB2

BB1

BB2

BB1

A BC

BB2

BB1

Figure 3.8Feeder EARTHED

Figure 3.9Feeder connected to BB2

18

BB2

BB1

BB2

BB1

A

C

D


Initial condition is feeder EARTHED:

Main panel with BB1:- Circuit-breaker BB1: OFF- Disconnector BB1: OFF- Earthing switch BB1: ON

Opposite panel with BB2:- Circuit-breaker BB2: OFF- Disconnector BB2: OFF- Earthing switch BB2: OFF

Connect feeder to BB2(Fig. 3.12 shows the final condition):1. Switch earthing switch BB1 (A)

OFF 2. Switch disconnector BB2 (B) ON3. Switch circuit-breaker BB2 (C)

ON


Connect feeder to BB1(Fig. 3.13 shows the final condition):1. Switch earthing switch BB1 (A)

OFF 2. Switch disconnector BB1 (D) ON 3. Switch circuit-breaker BB1 (E)

ON

The feeder is earthed by carrying outthe operations vice versa (Fig. 3.8shows the final condition)

BB2

BB1

BB2

BB1

BB2

BB1

BB2

BB1

A B

C

Figure 3.11Feeder EARTHED


19

BB2

BB1

BB2

BB1

AD

E


Combination cable feeder / bus coupler

Important!Bus coupler has to beswitched on.

Initial condition is feeder connectedto BB1:

Main panel with BB1:- Circuit-breaker: ON- Disconnector BB1: ON- Earthing switch: OFF

Opposite panel with BB2:- Disconnector BB2: OFF

Bus transfer without interruption tobusbar 2 (Fig. 3.15 shows the finalcondition):1. Switch disconnector BB2 (A)

ON.Feeder connected to BB1 and BB2.2. Switch disconnector BB1 (B)

OFF.Feeder connected to BB2.

The bus transfer from busbar 2 tobusbar 1 is realized by carrying outthe operations vice versa (Fig. 3.14shows the final condition).

The following description refers tofeeder panels with one circuit-breaker.

The bus transfer from busbar 1 tobusbar 2 is described.

3.5.2 Bus transfer of the feeder without interruption

BB2

BB1

BB2

BB1


BB2

BB1

BB2

BB1

AB


20

Bus coupler panels

Initial condition is bus coupler OFF:

Main panel with BB1:- Circuit-breaker: OFF- Disconnector BB1: OFF- Earthing switch BB1: OFF

Opposite panel with BB2:- Disconnector BB2: OFF- Earthing switch BB2: OFF

Switching the bus coupler on(Fig. 3.17 shows the final condition):1. Switch disconnectors BB1 (A)

and BB2 (B) ON.2. Switch circuit-breaker (C) ON.

Switching the bus coupler off:

Important!For switching the bus cou-pler off, at least one dis-connector in each panel

belonging to the relevant busbarsections has to be in position OFF.

The bus coupler is switched off bycarrying out the operations viceversa:1. Switch circuit-breaker OFF.2. Switch disconnectors BB1 and

BB2 OFF.

3.5.3 Switching the bus coupler on

21

BB2

BB1

BB2

BB1

BB2

BB1

BB2

BB1

B

C

A

Figure 3.16Bus coupler OFF

Figure 3.17Bus coupler ON

Initial condition is combination cablefeeder / bus coupler OFF:

Main panel with BB1:- Circuit-breaker BB1: OFF- Disconnector BB1: OFF- Earthing switch BB1: OFF

Opposite panel with BB2:- Circuit-breaker BB2: OFF- Disconnector BB2: OFF- Earthing switch BB2: OFF

Switching the combination cablefeeder / bus coupler on (Fig. 3.19shows the final condition):1. Switch disconnector BB2 (A)

ON.2. Switch circuit-breaker BB2 (B)

ON.Feeder connected to BB2 3. Switch disconnector BB1 (C) ON.4. Switch circuit-breaker BB1 (D)

ON.Feeder is connected to BB2 andBB1. The bus coupler is ON.

Important!For switching the bus cou-pler off, at least one dis-connector in each panel

belonging to the relevant busbarsections has to be in position OFF.

See Operating Instructions GMA AGS 531 521-01, chapter 6.7.

The combination cable feeder / buscoupler is switched off by carryingout the operations vice versa (Fig. 3.18 shows the final condition):1. Switch circuit-breaker BB1 and

BB2 OFF.2. Switch disconnector BB1 and

BB2 OFF.

22

Panels with combination cable feeder / bus coupler

BB2

BB1

BB2

BB1

Figure 3.18Bus coupler OFF

BB2

BB1

A

B

C

D

BB2

BB1

Figure 3.19Bus coupler ON

Switching the combination cable feeder / bus coupler off

3.5.4 Connect busbar sections with the bus section coupler

3.6 Earthing the busbar

Warning!Comply with all relevantsafety provisions.

See Operating Instructions AGS 531 521-01, chapter 6.7, withthe following supplement:Chapter 3.5.1 describes the connec-tion of the feeder to busbar 1 or 2with earthing accessories attachedto the cable terminals.Fig. 3.20 shows the busbar 1 whichhas been earthed via the feeder.

See Operating InstructionsAGSC 531 521-01, chapter 6.7.

Important!The disconnectors at thebusbar sections to be earthed have to be in posi-tion “OFF”.

Important!The switching operationsare always pictured point-ing at the position indica-

tors of the operator interfaces in themain panels.

Definition of terms:BB1 (= busbar 1) is used to desig-nate switching devices in main pan-els.BB2 (= busbar 2) is used to desig-nate switching devices in oppositepanels.

23

BB2

BB1

BB2

BB1

3.6.1 Earthing the busbar via the feeder and its circuit-breaker

3.6.2 Earthing a busbar section by the bus section coupler

Figure 3.20Busbar earthed via the feeder and its circuit-breaker

Initial condition is bus coupler OFF:

Main panel with BB1:- Circuit-breaker: OFF- Disconnector BB1: OFF- Earthing switch BB1: OFF

Opposite panel with BB2:- Disconnector BB2: OFF- Earthing switch BB2: OFF

Earthing BB1 (Fig. 3.22 shows thefinal condition):1. Switch disconnector BB1 (A) ON.2. Switch circuit-breaker (B) ON.3. Switch earthing switch BB2 (C)

ON.

BB1 is unearthed by carrying out theoperations vice versa.

Earthing BB2 (Fig. 3.23 shows thefinal condition):1. Switch disconnector BB2 (D) ON.2. Switch earthing switch BB1 (E)

ON.

BB2 is unearthed by carrying out theoperations vice versa.

Earthing BB1 (see also Fig. 3.22):1. Switch disconnector BB1 ON.2. Switch circuit-breaker BB1 ON.3. Switch earthing switch BB2 ON.

Earthing BB2:1. Switch disconnector BB2 ON.2. Switch circuit-breaker BB2 ON.3. Switch earthing switch BB1 ON.

The busbar section is unearthed bycarrying out the operations viceversa.

24

BB2

BB1

BB2

BB1

BB2

BB1

BB2

BB1

B

A C

3.6.3 Earthing a busbar section by the bus coupler

Figure 3.21Bus coupler OFF.

Figure 3.22Busbar 1 EARTHED.

BB2

BB1

DEBB2

BB1

Figure 3.23Busbar 2 EARTHED.

3.6.4 Earthing a busbar section by the combination cable feeder / bus coupler

In the following the earthing of thesingle-phase, solid-insulated currentconductors which connect main andopposite panels is described.

The current conductors are earthedautomatically- by earthing the feeder

(see Fig. 3.11).- by earthing a busbar section

(see chapter 3.6.3).

Initial condition is feeder EARTHED (see also chapter 3.5.1)

Main panel with BB1:- Circuit-breaker: OFF- Disconnector BB1: OFF- Earthing switch: ON

Opposite panel with BB2:- Disconnector BB2: OFF

Earthing the current conductors (Fig. 3.25 shows the final condition):• Switch circuit-breaker (A) ON

The current conductors are un-earthed by carrying out the opera-tions vice versa.

As an option the opposite panel canbe delivered with an additional earth-ing switch. In this way the terminalson both sides of the current conduc-tors which connect main and oppo-site panels can be earthed separately(see chapter 3.1.1).

25

BB2

BB1

BB2

BB1

3.7 Earthing the current conductors between main and opposite panels

Figure 3.24Feeder EARTHED.

BB2

BB1

A

BB2

BB1

Figure 3.25Current conductors EARTHED.

3.7.1 Combination cable feeder / bus coupler:

3.7.2 Feeder panels with one circuit-breaker:

4 Operating the voltage transformerdisconnecting device

4.1 Take off the cablecompartment cover

Voltage transformer and disconnect-ing device are installed in the oppo-site panel behind the cablecompartment cover:

1. Earthing switch “ON”2. Unlock the cable compartment

cover by moving the interlockingslide upwards.

3. Lift the cable compartment coverand take it off.

Operate the disconnecting device:

1. De-energize the cable feeder.Switch the circuit-breaker anddisconnector “OFF”.

2. Earth the cable feeder.Switch the earthing switch “ON”.

3. Take off the cable compartmentcover (see chapter 4.1).

4. Insert the lever for the discon-necting device (2) into the open-ing.

5. Pull the locking pin (1).6. Turn the lever (2) quickly to “ON”

or “OFF” till mechanical stop (ap-prox. 95º).

7. If end position is reached, thelocking pin must latch again.

8. Take off lever after switching op-eration has been completed.

9. Insert the cable compartmentcover and engage the interlock-ing.

10. Switch the earthing switch“OFF”.

Important!Observe the phase se-quence of the voltagetransformers.

The phase sequence is from left toright L3 - L2 - L1.

>>

26

1

2

3

Figure 4.1Take off the cable compartment cover1 Earth the panel2 Move interlocking slide upwards3 Lift the cable compartment cover

and take it off

4.2 Disconnecting device for voltage transformers

L3L2

L1

Phase sequencevoltage transformers

1

2

Figure 4.2Disconnecting device for voltage trans-formers. Observe the phase sequence ofthe voltage transformers!

Figure 4.3Disconnecting device and opening forlever.1: Locking pin2: Lever

5 Cable testing

See Operating InstructionsAGS 531 521-01, chapter 9,regarding the following supplement:

Important!In item 8 the earthingswitch is switched off andall switching devices of the

panel are in the necessary positionfor cable testing. In case the oppo-site panel of a combination cablefeeder / bus coupler (Fig. 5.1) isequipped with an additional earthingswitch, this earthing switch has to beswitched OFF additionally!

>>

27

BB2BB1

12

Fig. 5.1Combination cable feeder / bus coupler:Position of the switching devices duringcable testing.1 Test transformer2 High-voltage cable

Notes:

28

Notes:

29

Notes:

30

AREVA T&D Worldwide Contact Centre:http://www.areva-td.com/contactcentre/Tel.: +44 (0) 1785 250 070

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gas-insulated switchgear - schneider...

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