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GAS-INSULATED SWITCHGEAR Technical Instructions Operating Instructions No. AGS 532 521-01 Edition 09/07 GMA Panels with double busbar AREVA T&D >> (Supplement to Operating Instructions AGS 531 521-01)

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  • 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

    >>

    (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:

    Service-CenterD-93055 Regensburg, Germany +49 (0) 9 41 / 46 20-777 +49 (0) 9 41 / 46 20-778

    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

    >>

  • 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.

    >>

    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. C -5 / 40 1)

    Average value within 24 hours C 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 mechanisms 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-facturers 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 L2L3

    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 configurationwith 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 forback-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.

    >>

    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

    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 Electrical position indicator circuit-

    breaker in the opposite panel12 Position indicator of the earthing

    switch13 Electrical position indicator of the dis-

    connector in the opposite panel14 Electrical position indicator of the

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

    switch16 Mechanical interlocking of the open-

    ings for disconnector/earthing switchoperation (slide)

    17 Busbar 218 Busbar 119 Mechanical lock to prevent operation

    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

    switch27 Opening for operation of the earthing

    switch28 Mechanical interlocking of the open-

    ings for disconnector/earthing switchoperation (slide)

    29 Opening for operation of the discon-nector

    30 Diagram of the switching devices inthe main panel

    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

    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 Position indicator of the earthing

    switch11 Electrical position indicator of the dis-

    connector in the opposite panel12 Electrical position indicator of the

    earthing switch 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 Position indicator of the earthing

    switch20 Opening for operation of the earthing

    switch21 Mechanical interlocking of the open-

    ings for disconnector/earthing switchoperation (slide)

    22 Opening for operation of the discon-nector

    23 Diagram of the switching devices inthe main panel

    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 ifdisconnectorOFF

    not interlocked ifearthing switchON

    interlocked ifearthing switchON

    interlocked ifearthing switchOFF

    OFF - interlocked ifearthing switchON

    not interlocked ifdisconnectorOFF

    not interlocked ifearthing switchON

    not interlocked ifearthing switchOFF

    interlocked ifdisconnectorON

    interlocked ifearthing switchOFF

    Disconnector ON not interlocked - interlocked interlocked ifearthing switchOFF

    OFF not interlocked - not interlocked interlocked ifearthing switchOFF

    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 ifdisconnectorOFF

    -

  • 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 installations 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 45: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

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

    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

    Figure 3.10Feeder connected to BB1

  • 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

    The feeder is earthed by carrying outthe operations vice versa (Fig. 3.11shows the final condition).

    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

    Figure 3.12Feeder connected to BB2

    19

    BB2

    BB1

    BB2

    BB1

    AD

    E

    Figure 3.13Feeder connected to BB1

    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

    Figure 3.14Feeder connected to BB1

    BB2

    BB1

    BB2

    BB1

    AB

    Figure 3.15Feeder connected to BB2

    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 ON2. 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. 95).

    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 switchOFF.

    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

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    GMA Double Busbar Operating InstructionsContents1 Regulations and provisions2 Overview of variants GMA double busbar3 Operation4 Operating the voltage transformer disconnecting device5 Cable testing