Vacuum Circuit-Breakers, Type HVX12 – 24 kV, of cassette design,

cassette with motor drive

Operating InstructionsNo. 531 321, Edition 09/00

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Table of Contents

1 General 41.1 Operating Conditions 4

2 Design, supplementary Accessories and Method of Operation 52.1 Design 52.2 Supplementary accessories available on request 62.3 Method of operation 6

3 Transport, Reception and Storage 83.1 Transport 83.2 Reception 83.3 Storage 8

4 Assembly and Commissioning 94.1 Assembly of circuit-breaker types HVX 94.2 Test run 94.3 Commissioning 9

5 Operating Instructions 105.1 Operating instructions for circuit-breaker types HVX 105.2 Operating instructions for the spring mechanism 10

6 Operating Errors 11

7 Servicing 127.1 Servicing schedule 137.2 Spare parts 14

8 Malfunctions 15

9 Circuit-Breakers and Spring Mechanisms - Drawings and Keys 169.1 Circuit-breaker – drawing and key (630 A) 169.2 Circuit-breaker – drawing and key (1250 A) 179.3 Circuit-breaker – drawing and key (1600 A, 2000 A, 2500 A) 189.4 Mechanism of cassette with motor drive– drawing and key 199.5 Spring mechanism – drawing and key 209.6 Rack-in / rack-out mechanism – drawing and key 219.7 Accessories 229.8 Drawing with reference dimensions for rail 23

10 Inspection Record for Vacuum Circuit-Breaker HVX 24

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The HVX series circuit-breakers arevacuum circuit-breakers forapplication in 12 to 24 kV indoorswitchgear units.

1.1Operating conditionsThe circuit-breakers operateperfectly under the following climateconditions corresponding to IEC60694:

1.1.1Admissible ambienttemperature• The maximum temperature of the

ambient air is 40 °C, the averagemeasured over a 24 h period notexceeding max. 35 °C.

• The minimum temperature of theambient air is -5 °C.

1.1.2Installation altitudeThe circuit-breakers can be installedat altitudes up to 1000 m above sealevel. At higher installation altitudesreduced withstand voltage must betaken into account. It may benecessary to use circuit-breakers ofthe next-higher voltage series.

1.1.3Admissible air pollutionThe ambient air is not essentiallypolluted by dust, smoke, corrosive orinflammable gases and vapours, orby salt.

1.1.4Admissible atmospherichumidity• The average relative humidity,

measured during a 24 h period,does not exceed 95 %.

• The average vapour-pressure,measured over a 24 h period,does not exceed 22 mbar.

• The average relative humidity,measured over a one-monthperiod, does not exceed 90 %.

• The average vapour pressure,measured over a one-monthperiod, does not exceed18 mbar.

Ü Under these conditions condensation may occur:

- Condensation must be expectedif sudden temperaturefluctuations occur in periods withhigh atmospheric humidity.

- Condensation can be preventedby appropriate design andventilation of the building andheating the switchgear, or bymeans of dehydrators.

Ü These measures are recom-mended if an atmospherichumidity in excess of 75 % is tobe expected.

RemarksÜ If circuit-breakers are to be used

under conditions differing fromthose described above, themanufacturer must be consulted!

Attention: It is essential that no changes are made to the circuit-breaker !

Important instructions are marked Ü .Numbers and capital letters indicated in brackets refer to the illustrations on pages 16 to 22.

1 General

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2.1 Design2.1.1Circuit-breaker completeThe circuit-breaker consists of thedrive housing (127), the three poleswith current path (104-108, 123-124), the three switchingmechanisms (112-119), the cassettewith motor drive (128) and thespring mechanism (102).

2.1.2Drive casingThe drive casing (127) accom-modates the main shaft with thespring mechanism (102), controland operating devices and theconnection elements to the threepole frames (101).

2.1.3Pole with current pathThe primary current path (104-108,123-124) consists of the upperconductor (104), the vacuuminterrupter (105), the shield or thecontact terminal (106), the flexibleconnector (107), the lowerconductor (108), the isolatingcontact (123) and the insulatingconduit (124).

2.1.4Switching mechanismThe switching mechanism (112-119)consists of the spacer with screw(112), the contact pressure spring(113), the spacer (114), the pressurerod (115), the bearing (116), thelever (117), the connection to thedrive unit (118) and the coupling(119).

2.1.5Cassette with motor-driveThe cassette with motor drive (128)accommodates the rack-in andrack-out mechanism, the connectorcarrier (201) with connector and theinterlock between the rack-in andrack-out mechanism and the springmechanism (102).

2.1.6Spring mechanismThe HVX circuit-breakers are drivenvia a motorized spring mechanismFK 2-01.

2.1.6.1Mechanical equipmentEvery FK drive is equipped with thefollowing mechanical elements:• Hexagon socket for manual

charging of the spiral spring• “ON” pushbutton (10)• “OFF” pushbutton (12)• Circuit-breaker position indicator• Closing spring position indicator

2.1.6.2Electrical control of the circuit-breaker driveThe electrical equipment for thespring mechanism (102) FK 2-01 isdescribed in the circuit diagramsupplied with the unit.

2.1.6.3Control, protectionThe drive FK 2-01 can be used forauto-reclosing (OFF-reclosing). Inconjunction with the appropriateelectrical equipment, a controlsystem can be designed togetherwith the secondary relays.

2.1.7Rack-in and rack-outmechanism2.1.7.1SpindleRefer to illustration on page 21.The spindle (208) is located in thecassette with motor drive (128) andthe spindle bearing (205), where it isalso held axially by means of alocking ring. The two interlockrockers (205) are slipped on thecassette with motor drive (128) forlongitudinal protection, andsuspended on the 2 journals (206).

2.1.7.2MotorizationRefer to illustration on page 19.The multi-stage spur reductiongearing (210) is fixed in the cassettewith motordrive (128) via the spindle(208) which is mounted to thegearing. The motor is fixed in thegearing (210). An auxiliary crank forHVX (306) can be slipped onto oneshaft of the bearing (210) (refer toillustration on page 22).The 2nd gearing stage is designed asan overload coupling. This allowsthe final stops of the spindle (208) tobe approached without damagingthe spindle or the gearing (210).

2.1.7.3Electrical control of the rack-inand rack-out motorThe contactors K1 – K2 control themotor. They are mounted onto thehead plate of the circuit-breakerdrive. The limit switches S4 and S5are mounted to the gearing (210).(Refer to corresponding diagrams).

2 Design, supplementary Accessories and Method of Operation

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2.1.8Connector carrierRefer to illustrations on page 21.The connector carrier (201) is screw-fastened tightly in the cassette withmotor drive (128). The controlconnector (positive) on the circuit-breaker end (202) is secured in theconnector carrier (201). The controlconnector (negative) on the panelend (203) is fixed in the connectorsupport (204). The connectorsuppert (204) is slipped onto theconnector carrier (201).

2.1.9InterlocksMechanical interlocks are locatedbetween the circuit-breaker drive,the rack-in and rack-out mechanismand the connector.

2.1.10Position indicatorControl cams for 7 different contactdiagrams can be inserted on 8tracks on the position indicator plate(125) fixed in the cassette with motordrive (128). In case of the HVX,tracks number 7 and 8 are requiredfor the control. (Refer to corre-sponding diagram). Deck 6 isrequired if the earthing switch driveis motorised. The remaining 5 deckscan be used as necessary. Theposition indicator pack on the panelend, which features the integral limitswitches, is suspended in rotary andlaterally sliding position. A springpresses the position indicator packwith integrated limit switches againstthe position indicator plate (125). Agroove in the position indicator plate(125) provides for lateral centring ofthe position indicator pack. Thus, thelimit switches of the positionindicator pack are aligned to thecontrol cams of the positionindicator plate (125).

2.2Supplementary accessoriesavailable on requestCircuit-breaker coding

2.2.1Circuit-breaker codingTo enable circuit-breaker coding,the position indicator plate (125) isrequired on the circuit breaker, andthe position indicator pack withoutlimit switch on the panel end. Thisprovides 5 different coding variants.

2.3Method of operation2.3.1Circuit-breakerThe closing and opening movementis transmitted by the springmechanism (102) via the switchingmechanisms (112-119) to thevacuum interrupters (105). Onclosing, the movable contacts (110)touch the fixed contacts (109),tensioning the contact pressuresprings (113) embedded in theswitching mechanism (112-119), sothat the fixed contacts (109) and themovable contacts (110) are pressedtogether with the necessary closingforce.

2.3.2Spring mechanismThe spring mechanism (102)features a single shaft for closingand opening. The spiral spring (7)supplies the power for closing andopening. The cam disc (1) transmitsthe energy to the switchingmechanisms (112-119). The shaftand the cam disc (1) rotate by 360°for a closing and openingoperation.(To permit the operating cycle OFF-ON-OFF, the spiral spring (7) isretensioned after the vacuum circuit-breaker is switched ON).

2.3.2.1Closing (ON)The circuit-breaker is switched ONwhen the mechanical rocker isactuated to ON (10), or by means ofa control pulse emitted to the closingrelease (11).

2.3.2.2Opening (OFF)The circuit-breaker is switched OFFwhen the mechanical rocker isactuated to OFF (12) or by means ofa control pulse emitted to theopening release (13) or the no-voltrelease or the indirect over-currentrelease.

2.3.3Rack-in and rack-outmechanismThe spindle nut (209) latches on thepanel end. When the motor rotatesthe spindle (208) via the gearing(210), the circuit-breaker moves. Acam, mounted to the spindle nut(209), moves the lock rocker (205) ifthe circuit-breaker is not in serviceposition “I” or isolating position “0”.The interlock rocker (205) actuatesthe limit switch S4 (refer tocorresponding diagram), whichstops the motor. The final stops ofthe spindle nut (209) are mountedonto the spindle (208).

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2.3.4Electrical control of the rack-inand rack-out motorIf the “rack-in command” is issuedas a pulse or as a maintainedcontact, contactor K1 picks up andchanges into locking state. Inresponse to K1, the motor turns in“rack-in” direction. Now, if themotor turns the spindle (208), thelimit switch S4 is actuated. Thelocking state of K1 now alsoincludes S4. Just before the position“racked-in” is reached, the positionindicator on the panel endinterrupts the maintained “rack-in”contact and the locking condition ofK1 via its own contact. However, thelimit switch S4 continues to maintainK1, and S4 only opens when the“racked-in” position is reachedcompletely. Thus, K1 is dropped outand the motor switches off.On “racking-out”, the same applies,however in conjunction withcontactor K2 instead of K1.

2.3.5Interlocks2.3.5.1Circuit-breaker codingCircuit-breaker coding helps ensurethat the circuit-breakers can only beracked into panel s for which theyare designed.

2.3.5.2Cassette interlockThe circuit-breaker which is rackedin the panel by the transport trolley(303) only latches in the movingrocker if the spindle nut (209) is inthe position corresponding to theisolating position.

2.3.5.3Earthing switch interlockOnly applicable to PID panels orpanel equipment made byALSTOM AG.

The detachable lever used tooperate the earthing switch can onlybe inserted while the circuit-breaker

is in isolating position “0”, or while itis not in the panel .

2.3.5.4Connector interlockThe control connector (negative) onthe panel end (203) can only beinserted or removed while thecircuit-breaker is in isolating position“0”.

2.3.5.5Drive interlockThe circuit-breaker drive can only beswitched when the circuit-breaker isin isolating position “0” or in serviceposition “I” and while the auxiliarycrank (306) for the rack-in and rack-out mechanism has been removed.

2.3.5.6Interlock for HVX auxiliarycrank (306) for the rack-in andrack-out mechanismThe HVX auxiliary crank (306) whichserves to actuate the rack-in andrack-out mechanism can only beinserted if the circuit-breaker hasbeen switched off.

2.3.5.7Rack-in interlockThe circuit-breaker is mechanicallylocked in isolating position, if theearthing switch is in position “ON”.After approx. 4 turns of the HVXauxiliary crank (306), the circuitbreaker reaches this blockingmechanism.

2.3.5.8Electrical interlocksAuxiliary contacts and limit switcheshave been mounted to provideelectrical interlocks between thecircuit-breaker drive, the rack-in andrack-out motor drive and theearthing switch.(Refer to the correspondingdiagrams).

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3.1TransportThe circuit-breakers are dispatchedwith packing. The weight of thecircuit-breaker must correspond tothe final dimension drawing, whichhas binding character. Whensupplied, the circuit-breakers arecompletely assembled and adjusted.

3.2ReceptionÜ Unloading and unpacking the

circuit-breakers requiresmaximum care!

Ü After reception, the circuit-breakers must be unpackedwithout delay! The insurancecompany must be informedimmediately about damagewhich may have occurred intransit

Ü The circuit-breakers must bechecked for completeness!The manufacturer should becontacted in case of deviations.

Ü The circuit-breaker must not besubjected to mechanical strain(placing abruptly on the floor,knocking against obstacles,etc.)!

3.3StorageÜ The circuit-breakers must be

stored in unpacked conditionas specified under items 1.1.3and 1.1.4!

Ü The transport packing is notpacking for storage! The risk ofstoring the circuit-breakers inpacked condition shall be theconsignee’s responsibility!

3 Transport, Reception and Storage

The circuit-breaker must be liftedas shown in the Figure.This work requires a rope (nobright steel rope) of 12...15mmdia., or a strap.

Make sure that the rope isstrong enough to bear theweight of the circuit-breaker!

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Ù The circuit-breakers must be usedunder the conditions specified underitem 1.1!

4.1Assembly of the circuit-breakertypes HVXThe circuit-breakers are delivered inready-to-operate condition. They donot require additional assembly oradjustment work.

4.2 Test run4.2.1Mechanical function test• Vacuum test (refer to 7.1.3)• Set circuit-breakers externally to

disconnected position “0”. Ù Before coupling the transport

trolley (303) to the panel (refer toAssembly and OperatingInstructions, transport trolley531 341), the following items inthe panel must be checked:

• The moving rocker isfixed by a spring; it canbe pressed down.

• The position indicatorpack can be pusheddown and shiftedlaterally.

Ù Attention: Controlvoltage in the positionindicator pack is “ON”.

• The codings of circuit-breaker and panelcorrespond.

• There are no foreignbodies in the circuit-breaker compartment.

• Check the dimensions ofthe rail as shown in thedrawing on page 23.

• Insert the control connector onthe panel end (negative) (203)until the snap hook (216) isengaged.

• Switch circuit-breaker ON andOFF several times by hand(Operating Instructions, refer to5.2). At the same time, check thefollowing:

• Check position of position in-dicator (Switch position OFF)

• Check interlock featureaccording to items 2.3.5.4. to2.3.5.7.

• Check any mechanical interlocksprovided between the circuit-breaker and other devices.

• Move circuit-breaker to serviceposition “I” using the HVXauxiliary crank (306) and switchit ON and OFF by hand.

• Move circuit-breaker in dis-connected position “0” using theHVX auxiliary crank (306).

4.2.2Electrical function check• Switch control voltage ON. The

motor (9) of the springmechanism (102) starts tocharge the spiral spring (7)immediately.

• Switch circuit-breaker ON andOFF (remote-controlled, as far asthe electrical equipment of thespring mechanism (102) sopermits). To this effect, checkcontrol and signal circuits as wellas any electrical interlocksbetween the circuit-breaker andthe other devices.

• Rack in and out the circuit-breaker using the motor. To thiseffect, check control and signalcircuits as well as any electricalinterlocks which might existbetween the circuit-breaker andthe other devices.

4.3CommissioningBefore commissioning, complete theinspection record (cf. Section 10)based on the checks actuallyperformed.After these checks have beencompleted, the circuit-breaker canbe put into operation.

4 Assembly and Commissioning

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5.1Operating instructions forcircuit-breaker types HVX5.1.1Move circuit-breaker fromtransport trolley todisconnected position “0”Prerequisite:The transport trolley (303) iscoupled to the panel according tooperating manual 531 341.

• Set spindle nut (209) todisconnected position “0”.

• Push circuit-breaker to dis-connected position by hand untilthe moving rocker is engaged.

• Uncouple and remove thetransport trolley (303).

• Insert control connector on panelend (negative) (203) until thesnap hook (216) is engaged.

5.1.2Move circuit-breaker fromdisconnected position “0” toservice position “I”With motor:Commands are entered via local orremote control.With HVX auxiliary crank (306):• Move earthing switch to position

“0”.• Switch circuit-breaker OFF (check

position indicator).• Insert HVX auxiliary crank (306)

and turn it clockwise to its stop.(The circuit-breaker moves toservice position "I").

• Pull HVX auxiliary crank (306)out.

• Switch circuit-breaker ON (checkposition indicator).

5.1.3Move circuit-breaker fromservice position “I” todisconnected position “0”With motor:Commands are entered via local orremote control.With HVX auxiliary crank (306):• Switch circuit-breaker OFF.• Insert HVX auxiliary crank (306)

and turn it counter-clockwise toits stop.(The circuit-breaker moves todisconnected position "0").

5.1.4Move circuit-breaker from dis-connected position “0” ontothe transport trolley• Remove the control connector on

the panel end (negative) (203),(press snap hook (216) whilepulling out the control connectoron the panel end (negative)(203)) and place it in the cabletray of the PID switchgear

• Couple transport trolley (303) tothe panel.

• Move unlocking wedge to its stopunder the moving rocker.

• Pull circuit-breaker off the panelonto the transport trolley (303),until the transport trolley (303)can be uncoupled from thepanel.

5.2Operating instructions for thespring mechanismÙ The HVX vacuum circuit-breakers

can only be switched ON withthe disconnecting mechanism inone of its end positions "I“ or "0”.

5.2.1Switching ONWith motor:The spiral spring (7) is charged bythe charging motor (9) immediatelyafter closing. Switching ON takesplace via the command pulse to theclosing release (11) or actuation ofthe rocker ON (10) by means of theoperation rod (302).Manually:Charge the spiral spring (7) bymeans of the spring charging crank(304). As soon as the spiral spring(7) is charged, the spring chargemechanism is uncoupled.Switching ON takes place via thecommand pulse to the closingrelease (11) or actuation of therocker ON (10) by means of theoperation rod (302).

5.2.2Switching OFFTo switch OFF, actuate the rockerOFF (12) by means of the operationrod (302), or issue the commandpulse to the opening release (13) oractuate the no-volt release or thesecondary release.

5 Operating Instructions

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Determination Possible reason Remedy

The circuit-breaker cannot bepushed from the transport trolley(303) to the disconnectedposition “0”.

Wrong circuit-breaker, or the codingprevents racking-in.

The spindle nut (209) is not in its finalposition "0".

Use the appropriate circuit-breaker.

Move the spindle nut (209) to theappropriate position.

The moving rocker does not engagein the spindle nut (209).

The moving rocker does not return toits appropriate position by spring force.

Foreign matter is caught underneaththe moving rocker.

The moving rocker must be able tospring back to its stop.

The control connector on the panelend (negative) (203) cannot beinserted.

The spindle nut (209) is not in its endposition "0".

Move the spindle nut (209) to itsappropriate position.

The HVX auxiliary crank (306)cannot be inserted.

The circuit-breaker is switched ON.The control connector on the panelend (negative) (203) is not insertedcorrectly.

Switch the circuit-breaker OFF.Insert the control connector on thepanel end (negative) (203) until thesnap hook is engaged (216).

The circuit-breaker cannot beswitched ON.

The spindle nut (209) is not in its endposition “I” or “0”.

The spiral spring (7) is not charged.The HVX auxiliary crank (306) hasbeen left in the spindle (208).

Move the spindle nut (209) to itsappropriate position.

Charge the spiral spring (7).Remove the HVX auxiliary crank(306).

The circuit-breaker cannot be movedfrom its disconnected position “0”onto the transport trolley (303).

The control connector on the panelend (negative) (203) has not beenremoved.

The unlock clip is not slippedunderneath the moving rocker.

Remove the control connector on thepanel end (negative) (203).

Insert the unlock clip correctly.

The circuit-breaker cannot be movedfrom disconnected position “0” toservice position “I” via the HVXauxiliary crank (306).

The earthing switch is still turned ON. Switch the earthing switch OFF.

The rack-in/rack-out motor is notrunning.

The connector has not been inserted orhas not been inserted properly.The HVX auxiliary crank (306) hasbeen inserted.The circuit-breaker is switched ON.

Insert connector properly.

Remove the HVX auxiliary crank(306).Switch OFF.

6 Operating Errors

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Servicing comprises all measures todetermine and assess the actualcondition, and maintain and restorethe target condition of a system’stechnical equipment. It only coversthe following areas:− Inspection:

measures to determine and assess the actual condition

− Maintenance:measures to maintain and restore the target condition

− Repair:measures to restore thetarget condition

The vacuum circuit-breakers HVXare characterized by their beingequipped with zero-maintenancevacuum interrupters (105) and witha zero-maintenance springmechanism (102).

7.1Servicing schedule7.1.1GeneralÜ Before starting any mainten-ance or repair work, the circuit-breakers must be isolated,discharged by switching OFF-ON-OFF by hand with the motor andcontrol voltage disconnected, andmust then be removed from thepanel.

Ü The hood must not be removedon any account as long as thecircuit-breaker is in the panel .

Ü The protective cover of theswitch lock must not beremoved on any account.ATTENTION!• Actuation by hand only via

the rocker.• Electric actuation only via

the auxiliary switches.

Ü Maintenance and repair workmay only be performed bytrained staff.

Ü Screws marked with paint mustnot be released!

7 Servicing

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7.1.2Inspection schedule for monitoring the current statusThe time for inspection and the maintenance work involved depends on the following factors:

− the service life− the operating frequency− the number of breaking operations

Intervals Inspection Maintenance or repair work

Annually Visual inspection of the circuit-breaker.

Clean insulating components if contaminated.

Every 10 years Vacuum test according to 7.1.3.

Visual inspection of the springmechanism (102).

In case of loss of vacuum, replace vacuuminterrupters (105).Clean spring mechanism (102)if contaminated.Perform approx. 10 no-load switchingoperations.

After approx.10,000 operating cycles

Vacuum test according to 7.1.3. In case of loss of vacuum, replace vacuuminterrupters (105).Revise spring mechanism (102) as directed bythe manufacturer.

After 20,000 operating cycles - Replace vacuum interrupters (105)Revise spring mechanism (102) as directed bythe manufacturer.

After reaching the admissiblenumber of breakingoperations according tograph 7.1.4

- Replace vacuum interrupters (105).

After 1,000 rack-in / rack-outmovements of the circuit-breaker

- Revise gearing according to themanufacturer’s instructions.

7.1.3Vacuum test on the vacuum interrupterPrepare circuit-breaker according to 7.1.1 (Circuit-breaker in position OFF).

Pull lever (117) on the press rod (115) down until all bearing clearances are eliminated (stroke approx. 0.5 mm). If thelever is returned to its initial position by the vacuum, the vacuum interrupter (105) is perfectly sealed.If it is possible to press the lever (117) on the press rod (115) upwards (approx. 0.5 mm) and if it moves down againwhen released, this indicates that the vacuum interrupter (105) is leaking.

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7.1.4Number of admissible short-circuit breaking operationsThe graph shown here indicateswhether the interrupter mightrequire replacement. It refersexclusively to short-circuit currentsand purely inductive load currentswith a cos Φ < 0.1 [e.g. shuntreactor)], not, however, to normalload currents.

7.2Spare partsNo spare parts are provided.

Short-circuit breaking current in % of the rated short-circuit breaking current

Num

ber o

f adm

issib

le s

hort-

circu

it br

eaki

ng o

pera

tions

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In case of serious malfunctions, themanufacturer should be informedimmediately.

8 Malfunctions

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9.1Circuit-breaker –drawing and key (630 A)(Switch position ON)

101 Pole frame 114 Spacer102 Spring mechanism 115 Pressure rod103 Conductor fastening 116 Centring of vacuum interrupter104 Conductor on top 117 Lever105 Vacuum interrupter 118 Connection to drive106 Shield 119 Coupling107 Flexible connector 123 Isolating contact108 Conductor at the bottom 124 Insulating conduit109 Fixed contact of vacuum interrupter 125 Position indicator plate110 Movable contact element of vacuum interrupter 126 Bearing112 Spacer sleeve with screw 127 Drive casing113 Contact pressure spring 128 Cassette with motor drive

9 Circuit-Breakers and Spring MechanismsDrawing and Keys

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9.2Circuit-breaker -drawing and key (1250 A)(Switch position ON)

101 Pole frame 114 Spacer102 Spring mechanism 115 Pressure rod103 Conductor fastening 116 Centring of vacuum interrupter104 Conductor on top 117 Lever105 Vacuum interrupter 118 Connection to drive106 Contact terminal 119 Coupling107 Flexible connector 120 Heat dissipator on top108 Conductor at the bottom 123 Isolating contact109 Fixed contact of vacuum interrupter 124 Insulating conduit110 Movable contact element of vacuum interrupter 125 Position indicator plate111 Heat dissipator at the bottom 126 Bearing112 Spacer sleeve with screw 127 Drive casing113 Contact pressure spring 128 Cassette with motor drive

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9.3Circuit-breaker - drawing andkey (1600 A, 2000 A, 2500 A)(Switch position ON)

101 Panel frame 114 Spacer102 Spring mechanism 115 Pressure rod103 Conductor fastening 116 Centring of vacuum interrupter104 Conductor on top 117 Lever105 Vacuum interrupter 118 Connection to drive106 Contact terminal 119 Coupling107 Flexible connector 120 Heat dissipator on top108 Conductor at the bottom 123 Isolating contact109 Fixed contact of vacuum interrupter 124 Insulating conduit110 Movable contact element of vacuum interrupter 125 Position indicator plate111 Heat dissipator at the bottom 126 Bearing112 Spacer sleeve with screw 127 Drive casing113 Contact pressure spring 128 Cassette with motor drive

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9.4 Mechanism of cassette with motor drive –drawing and key

201 Connector carrier 209 Spindle nut204 Connector support 210 Gearing206 Journals 216 Snap hook208 Spindle 217 Castors

206 209 208

210

204

201

216

217

Auxiliary crank

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9.5 Spring mechanism –drawing and key

Note:The drawing shows the spring mechanism for a pole center space (PCS) of 185.

1 Cam disc 105 Vacuum interrupter7 Spiral spring 109 Fixed contact of vacuum interrupter9 Motor 110 Movable contact element of vacuum interrupter10 Pushbutton ON 113 Contact pressure spring11 Closing release 112 - 119 Switching mechanism12 Pushbutton OFF13 Opening release 304 Spring charging crank

13105110

113

712 1011

112-119 30491

109

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9.6Rack-in / rack-out mechanism- drawing and key

215 205 208 209 206

214 213 212

Notbetätigungs-kurbel306

Auxiliary crank

201 Connector carrier 212 Interlock clip202 Control connector on circuit-breaker end (positive) 213 Disconnecting interlock contact203 Control connector on panel end (negative) 214 Interlock rod204 Connector support 215 Tension spring with eyelets205 Interlock rocker (for interlock rockers)206 Journals 216 Snap hook208 Spindle209 Spindle nut

Auxiliary crank

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9.7AccessoriesÜ Remove control elements aftercompletion of the switchingoperation.

302 Operation rod303 Transport trolley (not shown)304 Spring charging crank FH/FK 2-01 H30 498306 HVX auxiliary crank H31 674

302

304

306

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9.8Drawing withreference dimensions for rail

Note:The reference dimensions only refer to a pole center space (PCS) of 210.

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This form must be completed based on the inspections actually performed before commissioning the vacuum circuit-breaker.

General Findings

• Test run performed .................................................

• Surface of insulating components cleaned by means of dry cloth .................................................

• All assembly tools removed from the switchgear .................................................

• Vacuum circuit-breaker of cassette design can be .................................................racked in and out in perfectly functioning condition

• Isolating contact engages as defined in the dimension drawing .................................................(only in case of panel s provided by customers)

• Protection sleeves removed from isolating contacts .................................................

• Protection sleeves removed from pole tubes .................................................

Remarks: ....................................................................................................................................................

............................................................................................................................................................................

............................................................................................................................................................................

Switchgear ...............................................................................................................................................................

Circuit-breaker type ............................................................................................................................................

Serial no. ................................................... /Index ..................................... Year of construction

................................

Type of spring mechanism ................................................. Wiring diagram ..........................................................

State of operations counter ..............................................................................................................................

Company: ................................................................................................................................................................

Place and date: ............................................ Signature of fitter: ..................................................................

10 Inspection Record for Vacuum Circuit-Breaker HVX