gas-insulated switchgear upto 36 kv

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Operation Manual Technical Manual

Medium Voltage Distribution

GHA

No. AGS 535 058-01Edition 04/2009

Gas-Insulated Switchgear upto 36 kV

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 thistechnical manual is permitted with the written permission from Schneider Electric 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.

Schneider Electric35, rue Joseph Monier CS 30323 92506 Rueil-Malmaison Cedex, France

www.schneider-electric.com

Manufacturer:Schneider Electric Sachsenwerk GmbH

Service:Should you have any queries as to our service, please contact:Schneider Electric Sachsenwerk GmbH

Schneider Electric

3AGS 535 058-01

GHA

Remarks on this manual 4Purpose and target group ......................................................................... 4Further applicable documents ................................................................... 4Terms and symbols used .......................................................................... 4Any questions or suggestions? ................................................................. 41 Safety provisions 52 Variants 62.1 Basic panel types ............................................................................. 62.2 Busbar attachements ....................................................................... 83 Technical data / control and operating devices 93.1 Applicable standards ........................................................................ 93.2 Environmental and operating conditions .......................................... 93.3 Ratings of the GHA series .............................................................. 103.4 Technical data of electrical control and operating devices............. 103.5 Use in accordance with the intended purpose ................................113.6 Nameplate ...................................................................................... 123.7 Disposal at the end of service life .................................................. 124 Voltage Detecting System (VDS) 134.1 Integrated Voltage Detection System IVIS ..................................... 134.2 Voltage Detection System VOIS+ .................................................. 134.3 Phase comparators ........................................................................ 135 Insulating gas monitoring 145.1 Technical information ...................................................................... 145.2 IDIS system .................................................................................... 146 Operation 166.1 Operator interfaces for manual operation ...................................... 166.2 Interlocks ........................................................................................ 196.2.1 Mechanical intra-panel interlocks .............................................. 196.2.2 Electromagnetic interlocks ......................................................... 196.2.3 Mechanical lock-out mechanisms with padlock (optional) ......... 196.3 Operating specifications ................................................................. 226.4 Operating the circuit-breaker .......................................................... 226.5 Operating the disconnector and earthing switch ............................ 246.6 Standard switching operations ....................................................... 266.7 Earthing the busbar ........................................................................ 287 Performing work on the panel 307.1 Removing the cable compartment cover ....................................... 307.2 Operating the isolating device for voltage transformer (VT) on ........ busbar ............................................................................................ 327.3 Operating the isolating device for voltage transformer (VT) in a fee . der panel ........................................................................................ 327.4 Cable jacket test ............................................................................. 347.5 Cable test ....................................................................................... 358 Maintenance 378.1 Safety provisions ............................................................................ 378.2 Servicing schedule ......................................................................... 378.3 Cleaning ......................................................................................... 388.4 Corrosion protection ....................................................................... 388.5 Admissible numbers of breaking operations for the vacuum inter ..... rupter chamber ............................................................................... 388.6 Replacement of components and panels ....................................... 398.7 Lubrication instructions ................................................................... 399 Annex 409.1 Auxiliary products ........................................................................... 409.2 Operating accessories .................................................................... 40

Contents

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This Technical Manual cannot describe every imaginable individual case or every customer-specific version of the product. For information which is not included in this manual, please contact the manufacturer.As our products are subject to continuous further development, we reserve the right to make changes regarding the standards, illustrations and technical data described in this Technical Manual.All dimensions specified in this manual are in millimeters.

Purpose and target groupThis Technical Manual describes the operation of gas-insulated medium-voltage switchgear units of the GHA series.It is an integral part of the product and must be stored so that it is readily accessible at all times for and can be used by persons who are to work on the switchgear. If the switchgear is sold to new owners, they must receive this document along with the switchgear.This Technical Manual is exclusively intended for specialist electricians who have been certified for the GHA series (training certificate).

Further applicable documentsThe following additional documents must be observed for this switchgear:

Purchase agreement containing the stipulations on the specific equipment of the switchgear and the legal details.

The contract specific switchgear circuit diagrams / documentation Assembly Instructions

Operating Manuals of the devices installed in the switchgear (e.g. IVIS, and devices in low-voltage cabinet)

Instructions for Assembly provided by the cable connection systems manufacturer giving details on how to connect the switchgear

Technical manual Use and handling of insulating gas for GHA (available on request, if required).

Terms and symbols usedThis manual uses certain symbols which warn about dangers or provide important information which must be complied with to avoid danger to personnel and damage to equipment:

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.

WarningThis warning symbol indicates dangerous electrical voltage. Contact with voltage may result in fatal injury!

WarningThis warning symbol indicates danger of injury. Observe alle instructions that are labeled with this sign to avoid death or serious injury.

ImportantThis symbol is used for information which is important to avoid damage.

Remarks on this manual

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The work described in this manual may only be performed by specialist electricians who have proved their experience with the GHA series (training certificate) and the applicable safety provisions.Read these instructions carefully before you work on the switchgear, and perform the work detailed in them as described.Applicable standards and regulations:

Common specifications for high-voltage switchgear and control gear: IEC 62271-1

Use and handling of sulphur hexafluoride (SF6) in high-voltage switchgear: IEC 62271-303

The locally applicable accident prevention, operating and work instructions must be complied with.

Installation: IEC 61936-1/HD 637 S11 Operation of electrical equipment: EN 50110-11

1 The national standards applicable in the country where the equipment is to be installed must be complied with.Before performing work on the panel, it is essential that you comply with the following instructions:

Action in the event of incidents or accidentsFor the case of an internal fault, the GHA switchgear features pressure relief flaps which prevent the panels and the switchgear from bursting. This Technical Manual does not include information regarding the safety of buildings in case of internal faults (pressure load of the switchgear compartment and necessary pressure relief ports). Pressure calculations for switchgear compartments incl. recommendations regarding pressure relief ports can be provided on request against a fee. For further details, please, contact the manufacturer.In case of fire or of internal faults, toxic and caustic decomposition products may be produced. Comply with the locally applicable accident and safety provisions.In case of personal injury, take first-aid measures or cause them to be taken.

1 Safety provisions

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 the removal of covers from a switchgear unit, operator safety regarding internal arcs may be reduced unless the switchgear is isolated from the power supply Optimum operator safety is only ensured if the switchgear is completely disconnected from the power supply and grounded during assembly

Warning:Before performing work in the drive area of the switchgear panels, switch off the supply voltage and prevent it from being switched ON againWarning:There is a risk of injury when working on the drive mechanism Before commencing work, release the energy-storing device by- an OFF-ON-OFF (Open/Close/Open) operating sequence on the circuit-breaker- closing via the Fault Make busbar earth switch

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1 Busbar tank with three-position switch2 Lifting points3 Busbar link4 Circuit-breaker tank with VA vacuum interrupter chambers5 Current transformer6a Outer cone termination6b Inner cone termination7 Voltage transformer with isolating device (optional)8 Attachment of cable support9 Cable compartment cover10 Isolating device for voltage transformer11 Test sockets for cable test12 Voltage indication system13 IDIS indicator unit for monitoring of insulating gas14 Hinged front frame15 Operator interface16 Low voltage compartment

Fig. 1Circuit-breaker panel with outer cone-type termination

Fig. 2 Circuit-breaker panel with inner cone-type termination

5

7

11

10

6b

8

2 Variants

21 Basic panel types

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1 Right-hand busbar tank with three-position switch2 Left-hand busbar tank with three-position switch3 Lifting points4 Busbar link5 Circuit-breaker tank with vacuum interrupter chambers6 Current transformer (optional)7 Voltage transformer (optional)8 Cable compartment cover9 Test sockets10 IDIS display unit for monitoring of insulating gas11 Hinged front frame12 Operator interface13 Low voltage compartment

123

4

5

6

9

12

10

11

8

7

13

Fig. 3 Bus section coupler

2 Variants (contd.)

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22 Busbar attachements

Fig. 4 Voltage transformer on busbar (2 attachments available)

Fig. 5Busbar earthing switch

2 Variants (contd.)

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31 Applicable standardsType GHA switchgear units are

metal-enclosed SF6 insulated type-tested tested for internal arc faults (classification IAC) designed for indoor installation

32 Environmental and operating conditionsGHA is an indoor switchgear which may only be operated under normal operating conditions in acc. with IEC 62271-1 regulations.Operation under conditions deviating from these is only admissible upon consultation and with the approval of the manufacturer.

GHA switchgear units meet the following standards and regulations:

Designation IEC standard EN standardSwitchgear IEC 62271-1

IEC 62271-200 EN 62271-200Circuit-breaker IEC 62271-100 EN 62271-100Earthing switch IEC 62271-102 EN 62271-102Disconnector IEC 62271-102 EN 62271-102Current transformers IEC 60044-1 EN 60044-1Voltage transformers IEC 60044-2 EN 60044-2Voltage Detecting Systems IEC 61243-5 EN 61243-5Protection against accidental contact, foreign bodies and water

IEC 60529 EN 60529

Installation IEC 61936-1 HD 637 S1Operation of electrical equi ment - EN 50110

Insulating gas sulphur hexafluoride (SF6)

IEC 60376 EN 60376

Use and handling of sulphur hexafluoride (SF6 )

IEC 62271-303

Degrees of protection against accidental contact and foreign objects (according to IEC 60529)Main electric circuits IP 65Low-voltage compartment IP 4XDDDrive mechanism IP 2X1

Ambient conditions (in accordance with IEC 62271-1)Temperature class minus 5 indoor2

Ambient temperature min./max C 5 /402Average value over 24 hours C 352Average rel. air humidity: 24 hours / 1 month % 95/ 902Installation altitude above sea-level m 10002

1 higher values available on request

2higher values available on request

3 Technical data / control and operating devices

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33 Ratings of the GHA series

34 Technical data of electrical control and operating devicesThe switchgear panels have been designed on principle so as to permit manual operation.The drive mechanisms of the individual switching devices can be equipped, depending on the specific customers model, with additional electrical control and operating devices. These are defined in the switchgear-specific circuit diagram (see switchgear documentation).Component fitting options:

Motor for charging the energy-storing device for actuation of the disconnector and earthing switch

Closing coil1 unit

Trip coilmax. 2 in totalSecondary coil (CT powered coil)

1 unit Maximum number of trip coils and secondary coils provided 2 in totalUndervoltage trip coil

1 unitBlocking coilBlocking coils prevent the circuit breaker from being closed and opened via the pushbuttons ON or OFF, as well as actuation of the interrogating slides of the disconnectors and earthing switches.In deenergized condition, blocking coils are always in blocked condition.

Rated voltage Ur kV 36Rated lightning impulse withstand voltage Up kV 170Rated power frequency withstand voltage Ud kV 70Rated normal current, busbar Ir max. A 2000Rated normal current, outgoing feeder panel Ir max. A 2000Rated peak withstand current Ip max. kA 63Rated short-circuit breaking current Isc max. kA 25Rated short-time current Ik max. kA 25 (3 s)Rated frequency fr Hz 50

Overview of rated supply voltagesDirect voltage DC V 24 48 60 110 125 220Alternating voltage AC V (110)/120 (220)/230

Power consumption DC approx (W) AC 50/60 Hz approx (VA)Closing coil 250Trip coil 250Undervoltage trip coil 15Secondary coil 12Blocking coil 12Motors 200250

Overview of rated supply voltages

Power consumption

Information about the power consumption of solenoids and the motor is available from the manufacturer. The supply voltage data is required to this effect.

3 Technical data / control and operating devices (contd.)

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Times for solenoids and motorMinimum command time OFF el. tripping ms 20Minimum command time ON el. tripping ms 20Motor charging time for energy storing device s 12

Times for solenoids and motor

Auxiliary switchAuxiliary switches are always actuated directly by the switch shaft via an intermediate linkage. Their position always corresponds to that of the main contacts.The switching functions have been set in the factory according to the circuit diagram.

Technical data of auxiliary switches for circuit-breaker (3 x 8-pole)

Technical data of auxiliary switches for disconnector and earthing switch (12-pole each)

Rated supply voltage V DC AC 48 125 220 120 230

Switching capacity A 10 3.8 2 10Time factor T=L/R ms 10 20 Rated short-time current 250 A / 3 sRated continuous current A 15

Rated supply voltage V

DC AC24 48 60 110 220 120 230

Switching capacity A 8 4 3 2 1 10Time factor T=L/R ms 20Rated short-time current 100 A for a duration of 30 ms

Rated continuous current A 10

35 Use in accordance with the intended purposeGas-insulated GHA medium-voltage switchgear units are designed exclusively for switching and distributing electrical power. They may only be used within the scope of the specified standards and the switchgear-specific technical data. Any other utilization constitutes improper use and may result in danger and/or damage.

Disclaimer of liabilityThe manufacturer shall not be held responsible for damage which occurs if:

instructions in this technical manual are not complied with, the switchgear is not operated in accordance with its intended purpose

(see above), the switchgear is assembled, connected or operated incorrectly, accessories or spare parts are used which have not been approved by

the manufacturer, the switchgear is modified without the manufacturers approval, or if

unapproved parts are attached.No liability is accepted for parts provided by customers, e.g. current transformers.


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GHA 36 16 08

GHA series

Rated voltage 36 kV

Rated short-time current 16 kARated operating current 800 A

37 Disposal at the end of service lifeA material and recycling data sheet can be provided on request for the disposal of series GHA switchgear at the end of its service life.Disposal is performed as a service by the manufacturers Service Center which is subject to a fee.The operating equipment contains the fluorinated greenhouse gas SF6 mentioned in the Kyoto protocol with a global warming potential (GWP) of 22 200. SF6 must be recovered and must not be released into the atmosphere. When using and handling SF6, comply with the specifications in the standard IEC 62271 High-Voltage Switchgear and Controlgear Part 303 Use and Handling of Sulphur Hexafluoride (SF6).

Fig. 6 Nameplate on the operating interface (front side) of the switchgear panel

1 Type designation2 Serial number 3 Year of construction4 Technical data


36 NameplateThe type designation of the switchgear panels on the nameplate (Fig. 6) specifies essential technical data. The following example shows the composition of the type designation:

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41 Integrated Voltage Detection System IVISIVIS (Fig. 7) is an integrated voltage detection system with display unit used to determine zero voltage according to IEC 61243-5.The IVIS system has been designed for maximum operating reliability. It does not require supply from an external source. It features climate-proof encapsulated electronics and is maintenance-free, due to permanent monitoring of the indication thresholds.Flash arrow symbols on the indicators display the operating voltage still existing within the defined response thresholds (Fig. 7). The IVIS system does not require the electrical repeat tests common for voltage detection systems.For a description of all functions and messages of the IVIS system, please refer to the separate Operating Manual IVIS (No. AGS 531757-01).

42 Voltage Detection System VOIS+VOIS+ is a three phase capacitive voltage detecting system with an integrated display unit used to detect the presence or absence of operating voltage in accordance with IEC 61243-5.For voltage detecting no battery or external supply voltage is required.Flash arrow symbols appear on the indicators display the operating voltage still existing within the defined response thresholds (Fig. 8).The device includes a 3-phase connecting point which is adapted to the LRM conditions according to IEC 61243-5 for phase comparison and phase sequence test.

Fig. 7 Integrated Voltage Detection System IVISFig

Fig. 8 Voltage Detecting System VOIS+ (Manufacturer: Kries-Energietechnik GmbH & Co. KG)

4 Voltage Detecting System (VDS)

43 Phase comparators

If IVIS is used, phase comparison can be performed by means of the phase comparator MS 100 (Fig. 9, ref. no. AGS C26320-01).Phase comparators are optionally available and not included in the scope of supplies.

Fig. 9 Phase comparator MS 100

Important:Observe the manufacturers Operating Manual.

Important:Before connecting live switchgear components for the first time, always check phase coincidence.

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51 Technical informationType of insulating gas:Sulphur hexafluoride SF6 in accordance with IEC 60376.The tanks of the switchgear have been designed as Sealed Pressure System as defined by the IEC publication 62271-200.Thanks to the design of the Sealed Pressure System, the insulating gas contents do not require any maintenance.During the expected service life, no insulating gas needs to be added under normal operating conditions acc. to IEC 62271-200.To ensure insulating gas monitoring, the IDIS system is used in each system as a standard (see section IDIS system).

Rated pressure and alarm values of IDIS gas compartment monitoring in GHA switchgear units

Rated voltage kV 36Rated normal current in a feeder panel A 2000Rated pressure1 MPa 0,06Pre-alarm in case of drop in pressure1 MPa 0,05Main alarm in case of drop in pressure1 MPa 0,03

1 The pressure data refers to +20 C and an atmospheric pressure of 101.3 kPa absolute.

52 IDIS systemThe temperature-compensated gas density information system IDIS represents the signals of the max. 3 gas density switches connected in terms of colour-coded LEDs.Telecommunication relays on the back enable signals to be transmitted to a remote control or I&C system.

Test I D I S

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Display ranges of the IDIS system for insulating gas monitoringThe table below describes the three possible insulating gas states which can be represented by the indicator unit for each active channel. The data is referred to a compartment monitored by a gas density switch.

Messages of the IDIS indicator unit per channel / measures to be taken in case of a loss of density (within the compartment)

LED display MeaningState of telecommunication relays

Measures

green

OperativeBoth telecommunication relays picked up

yellow

Pre-alarm in case of a drop in pressure

Telecommunication relay Pre-alarm released, Main alarm remains picked up

Contact Service-Center

Refill insulating gas1 and observe the system to see if the pre-alarm reoccurs

Plan ahead for shut-off

redMain alarm in case of drop in pressure

Telecommunication relay Main alarm released, Pre-alarm picked up again

Contact Service-Center

Isolate compartment from power supply

5 Insulating gas monitoring (contd.)

Important: - In case of a drop in pressure or of malfunctions, please contact

the manufacturers Service Center. - For a description of all the functions and messages of the IDIS

system, please refer to the separate Operating Manual IDIS (AGS 531 691-01).

1 Warning!Insulating gas may be refilled only by qualified personnel For further information on the use and handling of SF6, please refer to IEC 62271: High-Voltage Switchgear and Controlgear - Part 303: Use and Handling of Sulphur Hexafluoride (SF6)

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61 Operator interfaces for manual operation

Fig. 11 Operator interface of circuit-breaker panel with outer cone-type termination1 Position indicator, disconnector2 Position indicator, earthing switch3 Insertion opening for operation of earthing switch4 Insertion opening for operation of disconnector5 Position indicator, circuit-breaker6 Push-button circuit breaker CLOSE (ON) 7 Symbol for line voltage transformer (optinally) with isolating device8 Symbol for current transformer9 Status indicator for energy storing device released/charged10 Insertion opening for manual charging the circuit-breakers energy storing device11 Nameplate12 Symbol for capacitive interface13 Circuit-breaker operations counter14 Push-button circuit breaker TRIP (OFF)15 Interrogation slide, disconnector and earthing switch

6 Operation

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L R

Fig. 12 Operator interface of bus section panel1 Position indicator, earthing switch left-hand busbar2 Interrogation slide, disconnector and earthing switch left-hand busbar3 Position indicator, disconnector left-hand busbar4 Insertion opening for operation of the disconnector, left-hand busbar5 Insertion opening for operation of the earthing switch, left-hand busbar6 Push-button circuit breaker TRIP (OFF)7 Nameplate8 Operations counter9 Insertion opening for manual charging of the circuit-breakers energy storing device10 Status indicator for energy storing device released/charged11 Push-button circuit breaker CLOSE (ON)12 Switch position indicator, circuit-breaker13 Switch position indicator, disconnector, right-hand busbar14 Insertion opening for operation of the disconnector, right-hand busbar 15 Insertion opening for operation of the earthing switch, right-hand busbar16 Switch position indicator, earthing switch, right-hand busbar17 Interrogation slide, disconnector and earthing switch, right-hand busbar

6 Operation (contd.)

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Fig. 13 Busbar earthing switch Schematic diagram and operating interface1 Interrogation slide switch, earthing switch, busbar2 Position indicator, earthing switch, busbar3 Insertion opening for operation of the busbar earthing switch with padlock facilitiy (not included in scope of supplies)

Fig. 14Busbar voltage transformer Schematic diagram and operating interface1 Insertion opening for actuation of busbar voltage transformer with padlock facilitiy (not included in scope of supplies)2 Switch position indicator for voltage transformer isolating device


Busbar attachments

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62 Interlocks

621 Mechanical intra-panel interlocks With the circuit-breaker closed, the interrogation slide is locked for the

disconnector and the earthing switch. The interrogation slide always releases one insertion opening only

(disconnector or earthing switch), or both of them are locked. The crank for the disconnector and earthing switch can only be removed

in its appropriate end position. When the crank for actuation of disconnector or earthing switch has not

been removed, or if the interrogation slide is open, the push-button ON of the circuit breaker cannot be pressed or the ON pulse is interrupted.

In bus section panels with two interrogation slides, the following features are locked:

Both interrogation slides cannot be opened simultaneously. The interrogation slides are blocked depending on the position of the

disconnector or earthing switch (see interlock tables).

622 Electromagnetic interlocksElectromagnetic blocking coils can be used for inter-panel as well as intrapanelinterlocks:

the insertion openings for disconnector and earthing switch by the interrogation

slide are prevented from being released; the circuit-breakers ON and OFF push-buttons are blocked. the cable compartment cover

623 Mechanical lock-out mechanisms with padlock (optional)On request, switching devices can be equipped with interlock flaps to prevent manual operation (Fig. 15). The boreholes are provided for padlock yokes of 8 mm. The padlocks are not included in scope of supplies.

11

22 2

Fig. 151 Interlock flaps for ON/OFF pushbutton2 Blocked insertion openings for disconnector, earthing switch and voltage transformer


Important:In case of failure or absence of the supply voltage, all electrical interlocks are in their blocked position. Measure: Re-establish supply voltage.If no blocking coils to prevent maloperation are used, mechanical lock-out with padlocks must be provided (see section 6.2.3).The switchgear specific wiring diagramm shows detailed informations about the used electromechanic interlocks.

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Mechanical interlocks in a feeder panel(In case of remote control, the interlocks must be programmed accordingly via remote control).

Interlocks of busbar earthing switch (blocking coils)In case of remote control, the interlocks must be programmed accordingly via remote control.

Schematic diagrams of possible switch positions

Circuit-breaker ON OFF ON OFF OFF

Push-button ON/OFF free free free free free

Earthing switch OFF OFF ON OFF ON

Interrogation slide of earthing switch blocked free blocked free free

Crank decoupled

Disconnector ON/OFF ON OFF OFF OFF

Interrogation slide of disconnector blocked free blocked free free

Crank blocked

Explanations: no interlocking functionblocked crank cannot be inserted or push-button blockeddecoupled crank can be inserted, but without switching functionfree switching function enabled

Interlock Switch positionThe earthing switch can only be switched on if all disconnectors assigned to the busbar concerned are OFF.

The interlock acts on all interrogation slides of all disconnectors assigned to the busbar concerned.

Fig. 161 Blocked insertion opening (by padlock) for earthing switch


Important:If the switchgear comprises a bus section coupler, a blocking coil-type interlock is required on the disconnector in the feeder panels.

Important:If no blocking coils to prevent maloperation are used, mechanical lock-out with padlocks must be provided (Fig. 16).

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Mechanical interlocks in a bus section panel Interlocks also apply analogously if the left-hand and right-hand busbar

are exchanged In case of remote control, the interlocks must be programmed

accordingly via the panel control

Schematic diagrams of possible switch positions

L R L R L R L R L R

Circuit-breaker ON OFF ON OFF OFF

Push-button ON/OFFl free free free free free

Disconnector left-hand

ON/OFF ON OFF OFF ON

Interrogation slide left-hand blocked free blocked free free

Crank

Disconnector right-hand ON OFF ON OFF OFF

Interrogation slide right-hand blocked free blocked free free

Crank

Earthing switch left-hand OFF OFF ON AUS OFF

Interrogation slide left-hand blocked free blocked free free

Crank decoupled decoupled

Earthing switch right-hand OFF OFF OFF OFF ON

Interrogation slide right-hand blocked free blocked free free

Crank

Explanations: no interlocking functionblocked crank cannot be inserted or push-button blockeddecoupled crank can be inserted, but without switching functionfree switching function enabled


1 Important:Blocking coil-type interlock required. The circuit breaker button ON is blocked if the disconnector in at least one feeder panel in the left-hand busbar section is ON.

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6.3 Operating specificationsThe switchgear panel may only be operated by specialist electricians who have proven experience in conjunction with the GHA series (training certificate) and all relevant Safety regulations.Refer also to the safety provisions on page 5.

64 Operating the circuit-breaker641 Charging the circuit-breakers energy storing deviceInitial situation - Circuit-breaker

OFF

- Energy storing device discharged

Charging by means of a motorThe energy-storing device (closing spring) is charged automatically as soon as the motors supply voltage is applied.The position indicator of the energy storing device indicates the charged condition (Fig. 18).

Charging manually Insert crank (Fig. 17) into opening for tensioning the energy storing

device. Move crank clockwise until charged is indicated by the position indicator

(Fig. 18). If the motor starts during this process, this does not constitute a risk.

Remove crank and keep it in a safe place.

Fig. 17 Crank for charging the energy-storing device (is stored on the tool plate on the switchgear side wall)

Fig. 18 Charge the energy-storing device manually (approx. 25 rotations)

1 Position indicator, energy-storing device (charged)


Warning!To rule out faulty switching, the operating sequences described below must be complied with Each switching operation must be completed

Check whether the supply voltage is ON.

Important: - While the supply voltage is not available, blocking coils

(locking the interrogation slides and circuit-breaker push-buttons, depending on design), are in locked position. An undervoltage trip coil (optional) is tripped. Measure: Re-establish the supply voltage. - Before operating comply with the specified interlocking

conditions (refer to section 6.2). - After each switching operation for which you have used a

crank, remove the crank and store it in the tool board.

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642 Switching operations on the circuit-breaker

Switching ON (Closing) Press push-button ON (manually) (Fig. 19) or actuate closing coil (electrically).

Position indicator indicates the ON position.The energy storing device can be charged again immediately (manually) after ON actuation.When the supply voltage is on, the energy storing device is charged autonomously via the motor.

Switching OFF (Tripping) Press push-button OFF (manually) (Fig. 20) or or actuate trip coil (electrically) or actuate secondary coil or low-voltage coil (electrically).

Position indicator indicates the OFF position

Fig. 19 Switching on the circuit-breaker

Fig. 20 Switching off the circuit-breaker

PosPosition indicator Energy-storing device (closing spring)

Position indicatorCircuitbreaker

Possibleoperatingsequence

1 SpringsFree released OFF none

2 SpringsFree charged OFF CO

3 SpringsFree released ON O

4 SpringsFree charged ON OCO

C = switching ON (closing) O = switching OFF (tripping)

643 Position indicators on circuit-breaker and possible operating sequences


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65 Operating the disconnector and earthing switchManual actuation of the disconnector and earthing switch is, as a rule, inhibited by padlock (see also page 19).

651 Operating the disconnector manuallyInitial situation: - Circuit breaker OFF - Disconnector OFF - Earthing switch OFF

Switching on manually Release insertion opening (Fig. 22, B) by pushing the interrogation slide

(A) down. Insert crank (B, see also Fig. 21) and turn it by approx. 10 turns to the

right until the position indicator shows that the ON position has been reached completely (E).

Remove crank.Subsequently, the interrogation slide returns automatically to its central position.

Switching off manually Release insertion opening (Fig. 23, B) by pushing the interrogation slide

(A) down. Insert crank and turn it by approx. 10 turns to the left until the position

indicator shows that the disconnectors OFF position has been reached completely (E).

Remove crank.

Fig. 22 Switching on disconnector

Fig. 23Switching off disconnector

Fig. 21 Crank for disconnector and earthing switch drive


Important:The disconnector and earthing switch drives do not feature stops and can still be turned freely in their end position.

Important:If the interrogation slide does not return automatically to its central position after the crank has been removed, the crank for the disconnector drive must be turned briefly in the direction of actuation once again..

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652 Operating the earthing switch manuallyInitial situation: - Circuit breaker OFF - Disconnector OFF - Earthing switch OFF

Switching on manually Release insertion opening (Fig. 24, C) by pushing the interrogation slide

(A) up. Insert crank and turn it to the right by approx. 10 turns (B), until the

switch position indicator for the earthing switch (D) is completely in ON position.

Remove crank.Subsequently, the interrogation slide returns automatically to its central position.

Switching off manually Release insertion opening (Fig. 25, C) by pushing the interrogation slide

(A) up. Insert crank and turn it to the left by approx. 10 turns (B), until the switch

position indicator for the earthing switch (D) is completely in OFF position.

Remove crank.

Fig. 24 Switching on the earthing switch

Fig. 25 Switching off the earthing switch


Important:If the interrogation slide does not return automatically to its central position after the crank has been removed, the crank for the earthing switch drive must be turned briefly in the direction of actuation once again.

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66 Standard switching operations

661 Switching outgoing feeder cable

Initial situation - Circuit breaker OFF - Disconnector OFF - Earthing switch OFF

Disconnecting Switch circuit-breaker OFF (C). Switch disconnector OFF (A).

Initial situation - Circuit breaker OFF - Disconnector OFF - Earthing switch OFF

662 Earthing the feeder cable

Connecting Switch disconnector ON (A). Switch circuit-breaker ON (B)

Fig. 26

Fig. 27

Fig. 28

Fig. 29


Important:Observe the Operating Specifications on page 22 and the specified interlocking conditions (see section Interlocks).

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De-earthing Switch circuit-breaker OFF (C). Switch earthing switch OFF (A).

Earthing Turn earthing switch ON (A). Switch circuit-breaker ON (B)

Fig. 30

Fig.31

Initial situation - Circuit breaker OFF - Both disconnectors OFF - Both earthing switches OFF

663 Coupling busbar sections (bus section panel)

Decoupling Switch circuit-breaker OFF (C). Switch both disconnectors OFF (A and B).

Coupling Switch both disconnectors ON (A and B). Switch circuit-breaker ON (C).

Fig. 32

Fig. 33

Fig.34

L R

L R

L R


28 AGS 535 058-01

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Initial situation - Circuit breaker OFF - Both disconnectors OFF - Both earthing switches OFF

67 Earthing the busbar

671 Earthing one busbar section via bus section panel(Illustrated: Earthing the right-hand busbar. Proceed analogically for earthing the left-hand busbar.)

De-earthing Switch circuit-breaker OFF (D). Switch left-hand earthing switch OFF (B). Switch right-hand disconnector OFF (A).

Earthing Switch right-hand disconnector ON (A). Switch left-hand earthing switch ON (B). Switch circuit-breaker ON (C).

Right-hand busbar section EARTHED.

Fig. 35

Fig. 36

Fig.37

L R

L R

L R


Warning!The disconnectors on the appropriate busbar sections must be OFFImportant:Observe the Operating Specifications on page 22 and the specified interlocking conditions (section 6.2).

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Earthing Release insertion opening for crank by pushing the interrogation slide

(B) up. Insert crank and turn it to the right by approx. 10 turns, until the switch

position indicator for the earthing switch is completely in EARTHED position (A).

Remove crank.

De-earthing Release insertion opening for crank by pushing the interrogation slide

(B) up. Insert crank and turn it to the left by approx. 10 turns, until the switch

position indicator for the earthing switch is completely in OFF position (A). Remove crank.

Fig. 38

Fig. 39

672 Fault Make busbar earth switch


Important:The earthing switch drive does not feature a stop and can still be turned freely in its end positions. Initial situation: Earthing switch on busbar OFF

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71 Removing the cable compartment cover

711 Interlocking of the cable compartment coverAn additional electromechanical interlock prevents the cable compartment cover from being removed if the earthing switch and the circuit breaker in a feeder panel is not switched ON.If the cable compartment cover is removed, manual actuation of the earthing switch is blocked. The functioning of these interlocks is shown in the Table and depends on the positions of the circuit-breaker, the earthing switch and the cable compartment cover.In case of remote control, the interlocks must be programmed accordingly via remote control.

Interlocking table for cable compartment cover and earthing switch (manual operation)

Circuit-breaker OFF OFF ON ON OFF

Earthing switch OFF ON ON ON ON

EM for earthing switch free free free blocked blocked

Cable compartment cover mounted mounted mounted removed removed

EM for cablecompartment cover blocked blocked free free blocked

EM = Electromagnetic blocking coilfree = interlocking not activatedblocked = interlocking activated

Remove transport lock during commisioningDuring commissioning the transport lock for the electromechanical interlock must be removed. The transport lock keeps the electromechanical interlocking in open position without supply voltage in order to remove the compartment cover during assembly.The transport lock is marked on the cable compartment cover with a label (Fig. 40).

Remove the cable compartment cover (see section Removal of the cable compartment cover)

Unscrew the bolt to release the electromagnetic blocking coil (Fig. 41).

Fig. 41 Unscrew the bolt to release the blocking coil

Fig. 40 Transport lock marked on the cable compartment cover

7 Performing work on the panel

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Removal of the cable compartment coverInitial situation: - Circuit breaker ON - Disconnector OFF - Earthing switch ON Open front frame: Release the two securing bolts (Fig. 42, 1a and 1b)

and open the front frame by swinging it to the left. Unscrew the two securing bolts from the cable compartment cover (3). First pull the cable compartment cover up, then forwards to remove it.

713 Mounting the cable compartment cover Insert cable compartment cover. Screw-fasten cable compartment cover by hand, using two securing

bolts (3). Close front frame and tighten the two securing bolts (1a, b) by hand,

without using any tools.

Fig. 42

1 a/bSecuring bolts of the front frame2 Front frame3 Securing bolts of the cable compartment cover4 Interrogation slide

7 Performing work on the panel (contd.)

Important:After removal of the cable compartment cover the interrogation slide for of the earthing switch (4) is locked by an electromechanical interlock.

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72 Operating the isolating device for voltage transformer (VT) on busbar

Fig. 43 The isolating device is actuated via the crank for the disconnector and earthing switch.

Initial situation - VT EARTHED (A) - Operating inhibited by (optional) padlock (B) - Busbar DEENERGIZED

Fig. 44

Switching VT ON Remove (optional) padlock (B); the insertion opening for crank (C) is

freed. Insert crank and turn it to the right by a prox. 10 turns, until the switch

position indicator for the VT is completely in ON position (A). Remove crank and block insertion opening using the padlock.

Fig. 45

Earthing the VT Remove (optional) padlock (B); the insertion opening for crank (C) is

freed. Insert crank and turn it to the left by approx. 10 turns, until the switch

position indicator for the VT is completely in EARTHED position (A). Remove crank and block insertion opening using the padlock.

Fig. 46

73 Operating the isolating device for voltage transformer (VT) in a feeder panel


Warning!Isolating devices for VTs may only be actuated in de-energized condition Isolate the busbar from the power supply (see section Earthing the busbar)Important:The drive of the VTs isolating device does not feature a stop and can still be turned freely in its end positions.

Warning!Isolating devices for VTs may only be actuated in de-energized condition Earth the feeder cable (see page 26)The control elements of the isolating device for VTs in the feeder panel are located in the cable compartment. For access, you must first remove the cable compartment cover (see page 30).

Important:Observe the position indications on the isolating devices (Fig. 48, D, and Fig. 49, D).

Initial situation: - VT EARTHED - Feeder cable EARTHED

Manual actuation of the isolating device can optionally be inhibited by padlock (Fig. 48, G, and Fig. 49, G).

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731 Isolating device in case of inner cone-type termination

Switching VT ON Take handle (Fig. 47, A) out of the tool plate and insert it. Pull out upper locating pin (C) and hold it. Swing handle (A) speedily downwards. Release upper locating pin and pull out lower locating pin (B). Make handle lock in in its lower position; the isolating device moves on

to the closing contact (voltage transformer ON). Make lower locating pin lock in bore-hole (it must not be left in an

intermediate position). Remove handle (A) and store it in the tool plate.

Earthing VT Take handle (Fig. 48, A) out of the tool plate and insert it. Pull out lower locating pin and hold it (B). Swing handle (A) quickly up- wards. Release lower locating pin and pull out upper locating pin (C). Make handle lock in in its upper position; the isolating device moves on

to the earthing contact (VT earthed) Make upper locating pin lock in bore-hole (it must not be left in an

intermediate position). Remove handle (A) and store it in the tool plate.

A

B

C

A D

B

C

G

Fig. 48Earthing VT (inner cone termination)A HandleB Lower locating pinC Upper locating pinD Position indicationsG Openings for padlock

Fig. 47Switching VT ON (inner cone termination)A HandleB Lower locating pinC Upper locating pin


34 AGS 535 058-01

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732 Isolating device in case of outer cone-type termination

Switching VT ON Take handle (Fig. 49, A) out of the tool plate, insert it and attach it to the

screws (B). Pull out locating pin (C) and hold ist. Push handle (A) back (F) speedily

until the arrow (H) has reached the position indication ON and the locating pin locks in again. The isolating device slides on the closing contact (VT ON).

Remove handle (A) and store it in the tool plate.

74 Cable jacket testIf there are no documents to inform whether a cable jacket test may be performed on the cable connection system, the manufacturer of the cable connection system must be consulted before performing such a test.

To perform the cable jacket test, disconnect the earth connections (Cu shield) from the cable support.

To determine any damage on the outer plastic jackets or sheathes between the cables Cu shield and the earth, apply a test DC voltage in accordance with the applicable standard or the instructions of the cable manufacturer.

Once the test has been completed, re-mount the earth connection (Cu shield) on the cable support.

Earthing VT Take handle (A) out of the tool plate, insert it and attach it to the screws (B). Pull out locating pin (C) and hold ist. Pull handle (A) forward quickly (E

until the arrow (H) has reached the position indication earthed and the locating pin locks in again.The isolating device slides on the earthing contact (VT earthed).

Remove handle (A) and store it in the tool plate.

B

G

H

D

A

C

EF

A HandleB ScrewsC Locating pinD Position indicatingE, F Handle movementG Opening for padlockH Arrow

Fig. 50 Cable jacket testing principle for outer cone


Warning! Make sure that the connector housing does not touch any earthed switchgear components during the cable jacket test The connectors are not allowed to touch! If necessary, disconnect them

Fig. 49 Isolating device, outer cone terminal system

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75 Cable testGeneralCable tests with the cables connected can be performed for outer cone as well as for inner cone terminal bushings for each phase.The test sockets for inner cones are accessible from the panel front after removal of the cable compartment cover (Fig. 51).

Fig. 51 Test cable for inner cone terminal bushings (size 2)

Fig. 52 Cable test, outer cone

Cable test voltage

Ur[kV]

DC test voltage[kV]

max 15 min36 95


Warning! Comply with the safety provisions on page 5

The busbar can be operated with rated voltage during cable tests in the feeder panel (see nameplate).A test unit and a test adapter (not included in scope of supplies) are required for cable testing.

Important: - The assembly, operating and testing instructions for cable

fittings and connectors and the test unit must be taken into consideration. - Observe the specified interlocking conditions for cable

compartment cover and earthing switch (page 30).

36 AGS 535 058-01

GHA

Preparations Isolate the outgoing feeder cable of the panel that is to be tested (see

page 26). Isolate the feeder cable in remote station. Earth the feeder cable of the panel that is to be tested (see page 26).

Remove the cable compartment cover (see page 31). The earthing switch is locked now.

Earth the connected voltage transformer in the outgoing feeder cable (see page 32).

Short-circuit and earth capacitive measuring points in outgoing cable feeder.

Remove surge-proof covers from measuring points. Inner cone: Remove dummy plug Outer cone: Remove terminating elements in Tee plugs as specified by

the manufacturer

Performing the cable test Connect test adapter to test connector and test unit (Fig. 51 and Fig. 52).

Comply with the manufacturers specifications.

Set the panel to test position by switching OFF the circuit-breaker (Fig. 53, A). The test position is reached.

Earthing switch: ON (CLOSE) Circuit-breaker: OFF (TRIP)

Perform cable test observing the instructions of the cable or cable connector manufacturer. Do not exceed the admissible limits in this process (see table on the previous page).

Once the cable test has been completed: Switch circuit-breaker ON again. Remove test set:

Inner cone: Close test socket in surge-proof fashion using a dummy plug.

Outer cone: Provide cable fittings with terminating element according to the manufacturers instructions. Re-connect voltage transformer. De-earth capacitive measuring points in outgoing cable feeder and

remove short-circuit. Re-mount cable compartment cover.

Fig. 53 Set switchgear to test position


Important:Make sure that the distance between the metallic components of the test adapter and the earthed supporting structure of the switchgear is sufficiently dimensioned.

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81 Safety provisionsOnly specialist electricians certified by the manufacturer for maintenance work and who have the required knowledge regarding handling of GHA series medium-voltage switchgear are permitted to perform maintenance and cleaning work.

82 Servicing scheduleInsulating gasGHA panels have a hermetically sealed pressure system in accordance with IEC 62271-200. It does not require any maintenance over the panels entire service life (see also page 14 ).

Switching unitsThe components in the cladded high-voltage parts of the panel (vacuum circuitbreaker, disconnector and earthing switch) do not require any maintenance either.

Gas tankThe pressure tanks are made of stainless, non-magnetic steel.

The tank must be kept free from any deposits of external metal. Any risk of pitting corrosion must be avoided.

Drive mechanisms/coversDrive mechanisms and covers outside of the enclosure are corrosion-protected. Damage to the paint, scratches and deterioration must be repaired immediately to avoid corrosion.

PanelsThe switchgear panels must be checked visually at regular intervals, depending on the stress they are subject to during operation and the operating conditions, at least, however, every 4 years.If dirt or condensation is detected, the panels must be cleaned professionally. To this effect, only the cleaning agents which have been approved by the manufacturer may be used (see page 40).

8 Maintenance

Warning! Refer to the safety provisions on page 5

Warning! Neither drill holes into nor open gas tanks Risk of loss of insulating gas

Warning! Risk of injuries: The drives must not be disassembled for service and maintenance work

Important:In case of frequent condensation or air pollution with dust, smoke or corrosive gas, the maintenance intervals must be reduced accordingly. In case of ambiguities or irregularities, please contact the manufacturers Service Center immediately.

38 AGS 535 058-01

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Maintenance interval Work to be performedQualification /Work performed by

Every 4 years or depending on the actual ambient conditions

Visual inspection of the switchgear panels

If necessary, clean panels and test-run drive mechanisms manually (see sect. 8.3).

Staff certified accordinglyfor the work to be done

After 20 years

Lubricate drives (see sect.8.7) and perform a switching testCheck coils/blocking coils.

once the max. admissible number of breaking operations for the vacuum chambers has been reached (see Fig. 54) or

after 10,000 operating cycles of the circuit-breaker or

after 1000 operating cycles of the disconnector or earthing switch

Replace panel Manufacturers ServiceCenter

83 CleaningWhen deposited dirt and humidity are detected, the panels must be cleaned in an expert fashion.When performing cleaning, make sure that the lubrication in the drive mechanisms is not removed. If the drive mechanisms are no longer sufficiently lubricated, new lubrication must be applied.

Slight contamination:Clean using a dry, lint-free cloth. Depending on the degree of soiling, replace cloth as often as necessary.Serious contamination:Use cleaning agent, 1 litre can (see page 40). The use of other cleaning agents is not admissible.

Wear protective gloves Use cleaning agent according to manufacturers instructions Soak the cloth thoroughly and wipe the insulating components. Keep

duration of exposure as short as possible. Expose the cleaned surface to the air for at least two hours.

84 Corrosion protectionDrive mechanisms and covers have a long-term protection against corrosion. Any damage to the paint, scratches and other damage must be repaired immediately to avoid corrosion. Contact the manufacturers Service Center.

85 Admissible numbers of breaking operations for the vacuum interrupter chamberThe diagram defines exclusively the admissible summation current limit. It indicates whether the vacuum interrupter chambers need to be replaced.For the data regarding the rated normal current Ir and the short-circuit breaking current Isc, please refer to the nameplate (Fig. 55, 4).

Fig. 54Admissible numbers of breaking operations for the vacuum interrupter chamberIr = Rated (normal) current [A]Isc = Rated short-circuit breaking current [kA]

8 Maintenance (contd.)

Warning! Risk of injuries: The drives must not be disassembled for service and maintenance work

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86 Replacement of components and panelsThe drive mechanisms, current transformers and voltage transformers as well as the testing and monitoring systems can be replaced if necessary.Also, entire panels can be replaced.The following data on the nameplate are relevant for replacement of components or panels or in case of any queries:

Type designation (1) Serial number (2) Year of construction (3)

87 Lubrication instructionsMaintenance work may only be performed by specialists who are familiar with the switching devices installed with the and drive mechanisms thereof.

Once the operator interface has been removed, the drive is accessible from the switchgear front end (see assembly instructions).Remount operator interface once maintenance is finished.

Points of lubricationAll friction surfaces and articulations in the circuit-breaker, disconnector and earthing switch drives must be lubricated.

Lubricant Points of lubrication Lubrication procedureHigh-pressure grease

Circuit-breaker: bearing points of semishafts at the breaker mechanisms

Clean lubricating points using a lint-free cloth or a soft paint-brush, if necessary using cleaning agent (use sparingly, just moisten points of lubrication).Apply a thin coat of lubricant (using e.g. a paintbrush).

Silicone grease

Circuit-breaker: plastic lever on plastic housing of spring charging mechanism

Cryogenic grease

Circuit-breaker: roller levers, cam discs, cogwheels and other friction points

Lubricant KLall the accessible friction points outside of the circuit-breaker drive

Liquid lubricant FL

Bearing, articulations and guides outsideof the circuit-breaker drive

Pour drops of liquid lubricant (oil can, drip feed lubricator) into the bearing gap.Liquid lubricant gets between the bearing surfaces due to the capillary effect. In case of inaccessible lubrication points, use an extension tube or spray.

8 Maintenance (contd.)

Fig. 55 Replacement relevant data on the nameplate1 Type designation2 Serial number3 Year of construction4 Rated normal current Ir and short-circuit breaking current Isc

Warning! Refer to the safety provisions on page 5

Important:Only approved lubricants may be used, which can be purchased from the manufacturer (see page 40).

Important:The following elements are not lubricated: - Motor - Ball bearings - Auxiliary coil - Push switches - Blocking coils - Auxiliary switches

Lubricants

Points of lubrication

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91 Auxiliary productsOnly the following auxiliary products may be used, which can be purchased from the manufacturer. The use of other auxiliary products is not admissible.

Auxiliary product Ref noCleaning agent, 1-l can S 008152High-pressure grease ST 312-101-001Silicone grease ST 312-504-001Cryogenic grease ST 312-105-001Lubricant KL, 0.5 kg can ST 312-111-835Liquid lubricant FL 0.5-l can S 008 153Touch-up pen RAL 7044 silk-grey, 50 ml S 009 561

Touch-up pen, special paint (specify colour shade) S 009 562

92 Operating accessories

Fig. 56

Fig. 57

9 Annex

Warning! Risk of injury if the auxiliary products are handled improperly Comply with the safety data sheets of the auxiliary products

Handle for voltage transformer isolating device in case of outer cone-type cable connection system Ref. no. AGS 000692-01

Handle for voltage transformer isolating device in case of inner cone-type cable connection systemRef. no. AGS 0011 06-02

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Fig. 58

Fig. 59

Fig. 60

9 Annex (contd.)

Crank for disconnector and earthing switch drive with torque limitation Ref. no. AGS 000440-01

Spring charging crank for circuit-breaker spring operating mechanism Ref. no. AGS H30498-02

Double-bit key for locking and unlocking the control panel (IP 5X only) and the door of the low-voltage cabinetRef. no. AGS 434101-01

42 AGS 535 058-01

Appendices Notes

43AGS 535 058-01

Appendices Notes

AGS 535 058-01 01-2011

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As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication.

Publishing: Schneider ElectricDesign: Schneider ElectricPrinting:

This document has been printed on ecological paper

Schneider Electric35, rue Joseph Monier CS 30323 92506 Rueil-Malmaison Cedex, France

RCS Nanterre 954 503 439 Capital social 896 313 776 www.schneider-electric.com

gas-insulated switchgear upto 36 kv

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