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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

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  • Gas-Insulated swItchGear

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

    Manufacturer:

    AREVA Energietechnik GmbH – Sachsenwerk Medium Voltage Rathenaustrasse 2 D-93055 Regensburg, Germany ( +49 (0) 9 41 46 20-0 7 +49 (0) 9 41 46 20-418

    Service:

    Should you have any queries as to our service, please contact:

    AREVA Energietechnik GmbH – Sachsenwerk Medium Voltage Service-Center D-93055 Regensburg, Germany

    ( +49 (0) 9 41 4620-777

    7 +49 (0) 9 41 4620-778

    © 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 ............................................................. 4Purpose ................................................................................................................................ 4Reference documents ....................................................................................................... 4Terms and symbols used .................................................................................................. 5Abbreviations used ............................................................................................................ 5Any 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.................................................................................................... 93.2 Important information ............................................................................................ 93.3 Initial situation .......................................................................................................103.4 Extension on left-hand end of busbar .............................................................113.5 Extension on right-hand end of busbar ..........................................................15

    4 replacement of a panel within a switchgear system .....................................................................................20

    4.1 Safety provisions..................................................................................................204.2 Important information ..........................................................................................204.3 Initial situation .......................................................................................................214.4 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 ● 11 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

    12

    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. 2Busbar assignmentBB1 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 double 3 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 2SS 1

    1 2 5 8 9

    Fig. 3The 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 2SS 1

    1 2 5 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 4All 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.

    SS2SS1

    1 2 5 8 9

    1BB2 (top)

    BB1 (rear)

    Fig. 5New 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 connected1 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).

    SS2SS1

    1 2 5 8 9

    Fig. 6New 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).

    SS2SS1

    1 2 5 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 7New panel connected to the two busbarsBusbar 1 in operationBusbar 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 2SS 1

    1 2 5 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 8All 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 2SS 1

    1 2 5 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 9All 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).

    SS2SS1

    1 2 5 8 9

    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).

    SS2SS1

    1 2 5 8 9

    Fig. 11New 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).

    SS2SS1

    1 2 5 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 12New 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 a 4 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.

  • 21

    4 replacement of a panel within a switchgear system

    Gha l switchgear extension and replacement of a panel

    Initial situation4.3

    both busbar systems are operating ●the incoming feeder panels are located at the appropriate end of the ●switchgear

    one busbar system continues to operate alternately during the replacement ●wall-mounting ●

    SS2SS1

    1 5 6 7 8 9

    Fig. 13The 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 6, 7 and 8)BB1 Busbar 1 (arranged at the rear of the panel)BB2 Busbar 2 (arranged at the top of the panel)

    BB1 BB2

  • 22 Gha l switchgear extension and replacement of a panel

    4 replacement of a panel within a switchgear system

    Fault in a busbar compartment4.4

    In the following, a fault in the compartment of BB2 (upper busbar) of panel 7 (Fig. 14) is assumed.

    SS2SS1

    1 5 6 7 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 14Illustrated: Fault on busbar 2 of panel 7 – Outgoing feeder of panel 7 earthed – Busbar 2 isolated from power supply and earthed via the bus coupler Fault in the compartment of busbar BB2

    Isolate the fault from the power supply.1. Circuit-breaker compartment: isolate outgoing feeder of panel from the power supply, and earth it (see Operating Manual) (Fig. 14). Busbar compartment: Isolate the relevant busbar - busbar 2 - from the power supply and earth it (the diagram shows busbar earthing via the bus coupler, Fig. 14; 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 all safety provisions.

    Inform the manufacturer.2.

    Depending on the damage situation, it must be decided whether to repair 3. the panel concerned, or whether to wait until a new panel is available on site.

    BB1 BB2

  • 23

    4 replacement of a panel within a switchgear system

    Gha l switchgear extension and replacement of a panel

    4. Earth busbar 2 on both sides of the panel concerned (7). To this effect, earth busbar 2 additionally via the outgoing feeder of panel 8 (see Operat-ing Instructions) (Fig. 15). Attach a clear identification to busbars 1 and 2 of the adjacent panels.

    SS2SS1

    1 5 6 7 8 9

    Fig. 15Busbar 2 with additional earthing device in panel 8

    In the faulty panel, disconnect the busbar links of the busbar concerned 5. (shown: BB2) on both sides (3 x left-hand and 3 x right-hand, Fig. 16). Push clamping contacts into the busbar tubes of the appropriate left-hand panel.

    SS2SS1

    1 5 6 7 8 9

    1 1

    22 BB2 (top)

    BB1 (rear)

    Fig. 16Panel 7: Busbar 2 has been disconnected. The busbars of the adjacent panels were closed by means of surge-proof end caps. Busbar 1 in operation, busbar 2 still earthed, but ready to operate.

    surge-proof end caps1 busbar clamping contacts2

    Removing the faulty panel

    BB1 BB2

    BB1 BB2

  • 24 Gha l switchgear extension and replacement of a panel

    4 replacement of a panel within a switchgear system

    Remove silicone sleeves of the busbar connections.6.

    Clean and grease the open busbar bushings on the adjacent panels and 7. close them using surge-proof end caps (Fig. 16, item 1). Left-hand adjacent panel: narrow end caps Right-hand adjacent panel: high end caps Thus, both sections of busbar 2 are ready to operate.

    Reroute all outgoing feeder panels to 8. BB2.

    Warning! Risk of injury in case of operating errors! For safety reasons, all persons must be located in front of the switchgear during switching operations!

    Cancel both – BB2 earthings.

    Switch bus coupler ON. –

    Switch disconnectors in the incoming feeder panels to – BB2.

    Switch disconnectors in outgoing feeder panels - except those of the –faulty panel 7 – to BB2 (Fig. 17).

    In the outgoing feeder panels, open the disconnectors for BB1. –

    In the incoming feeder panels, open the disconnectors for BB1. –

    Switch off the bus coupler. –

    SS2SS1

    1 5 6 7 8 9

    Fig. 17Both sections of busbar 2 are in operation

    Earth 9. BB1 on both sides of the panel concerned (shown in Fig. 18: busbar earthing through bus coupler and via outgoing feeder of panel 8, see also Operating Manual, Chapter 6.7).

    SS2SS1

    1 5 6 7 8 9

    Fig. 18Busbar 1 earthed via bus coupler (5). Mount additional earthing device to busbar 1 (panel 8). All other panels switched to busbar 2.

    Warning! Risk of injuries. The upper busbar (BB2) is in operation and the rear busbar (BB1) is now earthed. Comply precisely with all safety provi-sions. Check busbar identification.

    BB1 BB2

    BB1 BB2

  • 25

    4 replacement of a panel within a switchgear system

    Gha l switchgear extension and replacement of a panel

    Release the busbar connections (10. BB1, rear busbar) in the faulty panel. Slip the clamping contacts into the busbar tubes of the left-hand panel (Fig. 19, item 2) and remove the silicone sleeves. Clean and grease the open busbar bushings on the adjacent panels and close them using surge-proof end caps (Fig. 19, item 1). Left-hand adjacent panel: flat end caps Right-hand adjacent panel: high end caps

    Thus, both sections of busbar 1 are ready to operate (Fig. 19).

    SS2SS1

    1 5 6 7 8 9

    11

    2 2

    BB2 (top)

    BB1 (rear)

    Fig. 19BB1 divided into two sections, each of which is closed with surge-proof terminations and operative again (BB1 sections still earthed)

    Surge-proof end caps1 Busbar clamping contacts2

    Recommission 11. BB1:

    Warning! Risk of injury in case of operating errors. For safety reasons, all persons must be located in front of the switchgear during switching operations!

    Cancel both – BB1 earthings.

    Switch bus coupler ON. –

    Switch disconnectors in the incoming feeder panels to – BB1.

    Both sections of busbars 1 and 2 are in operation. The faulty panel 7 was dis-connected from both busbar systems (Fig. 20).

    BB1 BB2

  • 26 Gha l switchgear extension and replacement of a panel

    4 replacement of a panel within a switchgear system

    SS2SS1

    1 5 6 7 8 9

    1 1

    2

    2

    2

    2

    BB2 (top)

    BB1 (rear)

    Fig. 20Panel 7: Both busbars are disconnected. The busbars of the adjacent panels were closed by means of surge-proof end caps. Busbar 1 in operation, busbar 2 in operation.

    Surge-proof end caps1 Busbar clamping contacts2

    Disconnect all the other panel connections:12.

    panel screw fastenings to adjacent panels / base frame –

    earth conductor – The left-hand and right-hand switchgear sections must be connected sufficiently to the building earth (see Assembly Instructions, Chapter 4.9).

    low-voltage connectors and ring lines –

    high-voltage terminals –

    Remove panel.13.

    14. On the new or repaired panel, treat the busbar contact areas and the clamping contacts in accordance with the Assembly Instructions. Insert the clamping contacts into the busbar tubes (Fig. 20, item 2) and reposition the panel on the base frame.

    Insert new panel

    BB1 BB2

  • 27

    4 replacement of a panel within a switchgear system

    Gha l switchgear extension and replacement of a panel

    1

    2 1

    2

    Fig. 21Releasing the busbar link

    Clamping contacts1 Surge-proof busbar end caps2

    BB1

    BB2

  • 28 Gha l switchgear extension and replacement of a panel

    4 replacement of a panel within a switchgear system

    Screw-fasten panels to adjacent panels and base frame (see Assembly 15. Instructions).

    Earth 16. BB1 sections.

    Warning! For safety reasons, all persons must be located in front of the switchgear during switching operations!

    Switch all outgoing feeder panels to BB2. After switching, open the disconnec-tors in the incoming feeder panels for BB1. Switch off the bus coupler.

    Earth BB1 on both sides of the panel concerned (shown in Fig. 22: busbar earthing through bus coupler and via outgoing feeder of panel 8, see also Op-erating Manual, Chapter 6.7).

    SS2SS1

    1 5 6 7 8 9

    Fig. 22Busbar 1: both sections earthed (e.g. left-hand busbar section with bus coupler [5] and right-hand section with earthing device in panel 8). All the other panels are located on busbar 2.

    Warning! Risk of injuries. Now, the upper busbar (BB2) is in operation and the rear busbar (BB1) is earthed. Comply precisely with all safety provi-sions. Check busbar identification.

    On busbar 1 (rear), remove the busbar end caps of the two adjacent pan-17. els. Clean and grease busbar bushings.

    Clean and grease silicone link sleeve, insert it under preload and mount it 18. on the right-hand side of each panel.

    BB1 BB2

  • 29

    4 replacement of a panel within a switchgear system

    Gha l switchgear extension and replacement of a panel

    Re-establish all 19. BB1 connections to the adjacent panels (6 x) completely (Fig. 23). Release the silicone sleeves and fasten them to the adjacent panel (see Assembly Instructions).

    SS2SS1

    1 5 6 7 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 23Panel 7: busbar 1 with full continuity and ready to operate again, but still earthed.Busbar 2 in operation.

    BB1 BB2

  • 30 Gha l switchgear extension and replacement of a panel

    4 replacement of a panel within a switchgear system

    The further steps for assembly are to be performed in accordance with the 20. Assembly Instructions:

    connect the earth bars. –

    connect the low-voltage cables (ring lines, external customer cables). –

    Commission replacement panel:

    comply with Assembly Instructions (Chapter 10). –

    check operating functions and interlocks of switching devices. –

    Set replacement panel to „EARTHED“ position (Fig. 24).

    Thus, busbar 1 is ready to operate again.

    Reroute21. outgoing feeder panels to BB1 (Fig. 24):

    Warning! Risk of injury in case of operating errors. For safety reasons, all persons must be located in front of the switchgear during switching operations!

    Cancel both – BB1 earthings.

    Switch bus coupler ON. –

    Switch disconnectors in the incoming feeder panels to – BB1.

    Switch disconnectors in the outgoing feeder panels to – BB1 (Fig. 24).

    In the outgoing feeder panels, open the disconnectors for BB2. –

    In the incoming feeder panels, open the disconnectors for BB2. –

    Switch off the bus coupler. –

    SS2SS1

    1 5 6 7 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 24Replacement panel earthed, all outgoing feeder panels on busbar 1

    BB1 BB2

  • 31

    4 Replacement of a panel within a switchgear system

    GHA l Switchgear extension and replacement of a panel

    Earth 22. BB2 on both sides of the panel concerned (shown in Fig. 25: busbar earthing through bus coupler and via outgoing feeder of panel 8, see also Operating Manual, Chapter 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. Check busbar identification.

    SS2SS1

    1 5 6 7 8 9

    Fig. 25Busbar 2: both sections earthed (e.g. left-hand busbar section with bus coupler [5] and right-hand section with earthing device in panel 8). All the other panels are located on busbar 1.

    BB1 BB2

  • 32 Gha l switchgear extension and replacement of a panel

    4 replacement of a panel within a switchgear system

    On busbar 2 (top), remove the busbar end caps of the two adjacent pan-23. els. Clean and grease busbar bushings. Clean and grease silicone link sleeve, insert it under preload and mount it on the right-hand side of each panel. Re-establish all BB2 connections to the adjacent panels (6 x) completely. Release the silicone sleeves and fasten them to the adjacent panel (see Assembly Instructions).

    All the other assembly steps are to be performed in accordance with the 24. Assembly Instructions:

    final steps –

    high-voltage terminals –

    Switch bus coupler ON. Thus, both busbars are operative again (Fig. 26).

    SS2SS1

    1 5 6 7 8 9

    BB2 (top)

    BB1 (rear)

    Fig. 26Replacement of panel complete. New panel (7) inserted and both busbars with full continuity and in operation again

    BB1 BB2

  • 33Gha l switchgear extension and replacement of a panel

    annex5

    The required auxiliary equipment is described in the Assembly Instructions.

    In addition, the surge-proof end caps are required for panel replacement.

    Description Quantity Item no.

    flat end caps 6 AGS 000 618-02

    high end caps 6 AGS 000 634-02

    Assembly kit for end caps - special grease - disposable gloves - cleaning cloth

    2 AGS 001983-01

  • Notes:

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

    www.areva-td.com

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    AGS 535 066-01ContentRemarks on this manualPurposeReference documentsTerms and symbols usedAbbreviations usedAny questions or suggestions?

    1Safety provisions2Panel description3Extension of an existing double busbar switchgear system3.1 Safety provisions3.2 Important information3.3Initial situation3.4Extension on left-hand end of busbar3.5Extension on right-hand end of busbar

    4Replacement of a panel within a switchgear system4.1 Safety provisions4.2 Important information4.3Initial situation4.4Fault in a busbar compartment

    5 Annex