operating manual vacuum circuit-breakers va, vaa, vxc

VA, VAA, VXCVacuum Circuit-Breakersup to 38 kV

Operating Manual

Nr. AGS 531 171-01Edition 06/05

T&D

Operating Manual

MEDIUM VOLTAGE SWITCHGEAR

Manufacturer:

Rathenaustraße 2D-93055 RegensburgPhone +49 (0)9 41/46 20-0Fax +49 (0)9 41/46 20-418

Service

Should you have any queries as toour service, please do not hesitate tocontact:

Service CenterD-93055 RegensburgPhone +49 (0)9 41/46 20-777Fax +49 (0)9 41/46 20-778

−2005− AARREEVVAA SSaacchhsseennwweerrkk GGmmbbHH

AREVA Sachsenwerk GmbH

AREVA Sachsenwerk GmbH

IMPORTANT NOTE

The Operating Instructions, which are exclusively valid are always supplied by AREVA Sachsenwerk GmbH together withthe product in question. Our products may only be commissioned, operated, serviced, repaired or decommissioned to-gether with Operating Instructions which have been directly enclosed to the product in question by the factory.

On the other hand, this electronic version of the operating instructions is provided to the customer at his/her request forinformation only. None of our products may be commissioned, operated, serviced, repaired or decommissioned on thebasis of this electronic version.

Non-compliance with this instruction may entail serious damage to the product, the objects pertaining to it, as well ashealth hazard or mortal danger. AREVA Sachsenwerk GmbH shall not be held liable for any such damage.

1 Regulations, provisions,operating conditions 4

1.1 Remarks on this manual 41.2 Terms and symbols used 41.3 Use in line with the intended purpose 41.4 Applied standards 51.5 Safety provisions 51.6 Disposal after the end of service life 5

2 Technical data 62.1 Type designation 62.2 Operating times 62.3 Control and operating devices 7

3 Variant overview 9

4 Delivery, storage and transport 104.1 Delivery 104.2 Storage 104.3 Transport 10

5 Assembly 115.1 Instructions for assembly 115.2 Fastening the circuit-breaker 115.3 Locking of additional devices 125.4 Pole partitions 125.5 Connecting the conductor bars 125.6 Earth terminal 135.7 Connecting the control lines 13

6 Commissioning 14

7 Operation 157.1 Operator interface and operating elements 157.2 Charging the energy storing device 167.3 Switching operations 16

8 Servicing 178.1 General 178.2 Cleaning insulating components 178.3 Servicing schedule 178.4 Numbers of breaking operations

at summation current limit 188.5 Lubrication instructions 198.6 Replacement of control and

operating devices 22

9 Annex 259.1 Accessories 259.2 Auxiliary products 259.3 Screw couplings 259.4 Treatment of firmly screw-connected

switching surfaces 26

3

Contents

1.1 Remarks on this manual

This manual describes transport, as-sembly, operation, handling andmaintenance of vacuum servicebreakers VA, VAA and VXC.

It must be stored so that it is at anytime readily accessible for and canbe used by persons who are to workon the switchgear.

When re-selling the circuit-breakeror the switchgear with circuit-brea-ker, make sure that this manual istransmitted as well.

For assembly and operation of thecircuit-breaker, the operating manualof the switchgear in which it is ope-rated must be complied with.

All dimensions specified in this ma-nual are metric.

1.2 Terms and symbols used

This manual uses certain terms andsymbols. They warn about dangersor provide important informationwhich must be complied with at allcosts so as to avoid danger and da-mage:

„WARNING“This symbol warns of dan-gerous electrical voltage.Contact with voltage mayresult in fatal injury!

„WARNING“This symbol is used for in-structions non-compliancewith which may result in se-rious injury, death or seriousmaterial damage.

„NOTICE“This symbol is used for in-formation which is importantto avoid damage.

1.3 Use in the line withthe intended purpose

Vacuum circuit-breakers VA, VAAand VXC are exclusively intended asswitching units in air-insulated medi-um-voltage switchgear. They mustonly be used in the scope of thespecified standards and the switch-gear-specific technical data. Any ot-her use constitutes improper useand may result in dangers and da-mage.

Disclaimer of liability

The manufacturer shall not be heldresponsible for damage which oc-curs if

• instructions in this manual are notcomplied with,

• the circuit-breaker is not opera-ted according to its intended use(see above),

• the circuit-breaker is assembled,connected or operated improper-ly,

• accessories or spare parts areused which have not been appro-ved by the manufacturer,

• the circuit-breaker is convertedwithout the manufacturer's appro-val, or if inadmissible parts are at-tached.

In case of queries and orders forspare parts, the following data onthe rating plate must be specified:

- Type designation

- Factory number

- Year of construction

NOTICE:Operating reliability andservice life depend oncorrect operation.

Regulations, provisions, operating conditions

1

4

1.4 Applied standards

The three-pole vacuum circuit-brea-ker VA, VAA, VXC

• corresponds to the requirementsfor AC switchgear for voltagesabove 1 kV acc. to IEC 62271-100;

• complies, regarding its switchingcapacity and insulating level,ANSI C37.... (please enquire atthe manufacturer's)

Type approval of vacuum interrup-ter chambers acc. to. RöV

The vacuum interrupter chambershave been approved by the X-RayOrdinance (RöV) of the Federal Re-public of Germany up to a maximumvoltage amounting to the rated short-time power-frequency voltage (ratedpower frequency withstand voltage)defined by DIN VDE/IEC. Thus, theysatisfy the conditions for operationexempt of approval up to the voltagein question according to the X-RayOrdinance (RöV).

Environmental and operating conditions

Circuit-breakers VA, VAA and VXCmay only be operated under normaloperating conditions according toIEC 60694. Operation under conditi-ons different from these is only ad-missible upon consultation with themanufacturer and obtention of hisapproval.

1.5 Safety instructions

The work described in this manualmay only be performed by specialistelectricians who have proved theirexperience with the circuit-breakerVA, VAA, VXC and EN 50110-1.

Applicable standards and regulati-ons:

• Adhere to the locally applicableaccident prevention, operatingand work instructions.

• Installation: HD 637 S1

• Operation of electrical equip-ment: EN 50110-1

Read these instructions carefully be-fore you work on the circuit-breaker,and perform the work detailed in itaccording to the descriptions. Onlyperform such work if you have un-derstood the instructions. Do notperform any work on the circuit-breaker which is not described inthis manual.

Before starting work onthe circuit-breaker, de-energize the system, ve-rify it for zero voltageand earth the systemaccording to the appli-cable safety rules pur-suant to EN50110-1.

Before performing workon the circuit-breaker,switch off the supplyvoltage and prevent itfrom reclosing.

Risk of injury due to theenergy storing device.Before starting work, re-lease the energy storingdevice via the operatingsequence OFF-ON-OFF.

1.6 Disposal after theend of service life

A manual on disposal after the endof the service life is available for dis-posal of the circuit-breaker VA, VAA,VXC. Disposal at the end of servicelife is performed on request by theservice center at the manufacturer's.

5

Ambient conditions

Temperature class:"Minus 5 indoors" (optional "Minus 25 indoors")

Ambient temperaturemin./max.

-5 /40oC

Average value over 24hours (max.) 35oC

Maximum installation altitude above sea level(higher installation altitu-des possible on re-quest)

1000m

2.1 Type designation

The type designation of the vacuumcircuit-breakers - refer to rating plate- specifies the essential technicaldata. The following example showsthe composition of the type designa-tion:

Rated voltage [kV] 12 17,5 24 36 38

Opening time at rated voltageof the release

for release 160 W

for release 25 W[ms]

[ms]

30 - 50

45 -65

Arc duration (max. value) [ms] 6 - 12 6 - 14

Closing time at rated voltage ofthe release

[ms] 35 - 75

Minimum command time"OFF"Electrical tripping

for release 160 W

for release 25 W

[ms]

[ms]

20

50

Minimum command time "ON" [ms] 20

Motor charging time [s] < 12

2.2 Operating times

6

Technical data2

EExxaammppllee VA 63 12 / 336 - 22

VASeries VAA

VXC

Rated short-circuit making current 63 kA

Rated normal current 1250 A

Rated voltage 36 kV

Insulation level: Rated lightingimpulse withstand voltage 170kV

2.3 Control and operating devices

The drive mechanism is designed onprinciple for manual charging of theenergy storing device (closingspring).

The drive can be equipped with ad-ditional operating and control devi-ces.

Possible components fitted:

Motor

• for charging the energy-storingdevice (closing spring)

Shunt opening release

• 2 ea.

Secondary coil

• 2 ea.

• (Maximum equipment - shuntopening release and secondarycoil, 3 in total)

Under-voltage coil

• 1 ea.

• An additional device prevents re-leasing "OFF" of the circuit-brea-ker on closing, if voltage is onlyapplied to the undervoltage re-lease after switching ON.

Shunt closing release

• 1 ea.

Blocking coil

• The blocking coil prevents thecircuit breaker from being swit-ched on via the "ON" push-but-ton when the rated supply volta-ge has dropped out or has beenswitched off.

Locking mechanism with lock

• The locking mechanism with lockblocks the "ON" or "OFF" but-tons or only the "ON" button (de-pending on design).

Operating counter

• The operating counter indicatesthe number of switching operati-ons.

Push switches

• installed depending on compo-nents fitted and operating se-quence

Extension of the switch shaft

• The switch shaft can be equip-ped subsequently with "shaft ex-tension", at choice on the right,left side or on both sides. To thiseffect, refer to section 5.4 "Lo-cking of additional devices".

Anti-pumping relay

If an ON and OFF command is si-multaneously and permanently pre-sent at the circuit-breaker, the latterreturns to its initial position after clo-sing. It remains in this initial positionuntil the ON command is issuedanew. This prevents continuous clo-sing and opening ("pumping").

7

Solenoids Power con-sumption [W]

Shunt closing release160

Shunt opening release without auxiliary spring energy store

Shunt opening release with auxiliary spring energy store 25

Undervoltage release without/with delay 15

Secondary coil12

Blocking coil

Motor 200 - 250

Information about the power consumption of coils and the motor is available from themanufacturer. To this effect, auxiliary voltage data is required.

Power consumption of solenoids and motor, motor charging time

2.4 Auxiliary switches

Switching functions on delivery, referto circuit diagram.

Other switching functions of the au-xiliary switch can be set by adjusta-ble cams.

The setting may only be performedby specialists who dispose of experi-ence regarding the installed auxiliaryswitches.

WARNING!Refer to the safety in-structions in section 1.5.

The auxiliary switches are accessiblefrom the front end of the switchgearafter removal of the front cover.

Setting procedure:

1. Remove cover plate(release five screws).

2. Set desired switching function.

3. Click cam back into catch.

4. Check whether the cam has lok-ked in the changed position.

5. After adjustment, mount coverplate.

Cam

Viewing direction for adjustment

Position of cams during adjustmentCircuit-breaker OFF

Circuit-breaker OFF ON

Late make contact

Early make contact

Late break contact

Wiping contact

Auxiliary switch "ON"

Early break contact

Fig. 1

Setting the cams of the auxiliary switch

Fig. 2

Possible switching functions of the auxiliary switch (switching program)

Rated supply voltageVDC VAC

[V] 24 48 60 110 220 120 230

Switching capacity [A] 8 4 3 2 1 10

Rated short-time current 100 A for a duration of 30 ms

Time factor T=L/R [ms] < 20 -

Rated continuous current [A] 10

Auxiliary switch

8

Variant overview3

Fig. 4

Vacuum circuit-breaker, series VA,VXC, switch pole

Fig. 5

Vacuum circuit-breaker, series VAA,switch pole

Fig. 3

Vacuum circuit-breaker, series VA, VXC

9

4.1 Delivery

• Handle shipping units carefullywhen unloading and unpackingthem.

• Shipping units must be unpackedimmediately after receipt. Any da-mage occurred in transit must berecorded and reported immedia-tely to the manufacturer.

• On delivery, the consignmentmust be checked for complete-ness.

• The supplier must be notified inwriting about any differences.

4.2 Storage

The transport packaging is not inten-ded for storage. The risk of storingthe parts in packed condition shallbe the consignee's responsibility!

4.3 Transport

TTrraannssppoorrtt uussiinngg aa ffoorrkklliifftt ttrruucckk:: Only transport the circuit-breaker ona pallet.

TTrraannssppoorrtt wwiitthhoouutt ppaalllleett::Lift circuit-breaker acc. to Fig 6. Tothis effect, a crane mounting harnessis required.

WARNING:Make sure the cranemounting harness is

strong enough to bear theweight of the circuit-breaker!

Delivery, storage and transport4

Series Rated voltage[kV]

Weight[kg]

VA12 / 17,5 / 24 140

36 160

VAA 12 / 17,5 / 24 105

VXC24 130

36 / 38 160

Approximate values without packaging in case of maximum rated (normal) current

Weights

10

< 90

Fig. 6

Transport without pallet

5.1 Instructions for as-sembly

• Check data on rating plate.

• Check rated supply voltage of thecontrol and operating devices in-stalled.

The circuit-breakers are supplied inposition "OFF" and with the energystoring device "released".

WARNING!Refer to the safety in-structions in section 1.5.

5.2 Fastening the circuit-breaker

• The securing points are the endsof the post insulators with speci-fied hole pattern. In special mo-dels, the securing holes are pro-vided with threaded inserts. Forexamples for the securing design,see below.

• Any other than standard installati-on positions must be agreedupon with the manufacturer.

• Screws and attachments are notincluded in the scope of supplies.

• Parts for fastening

- must be suitable for theweight of the circuit-breaker.

- may not protrude by morethan 10 mm over the post in-sulators to the circuit-breakerpoles.

• The circuit-breaker must not bedeformed by the fastening.

NOTICE:Comply with the speci-fied tightening torques(refer to Annex).

The dimension drawing is providedon request.

Assembly5

Fig. 7

Fastening example for up to 24 kV

Fig. 8

Fastening example for 24 kV to 38 kV

11

• Remove transport aid and jackrings.

• Take account of DIN 43 670 andDIN 43 671 regarding the dimen-sioning for continuous current.

• Maximum distance of the nextsupport point from the circuit-breaker's terminals in the directi-on of the switch pole axis: 3xpole center spacing of the cir-cuit-breaker (unless the next sup-porting point is located in the di-rection of the switch pole axis,make sure that the circuit-breakerpole is not exposed to higherelectrodynamic forces).

• Screw-fasten conductor bar ac-cording to DIN 43 673.

• The circuit-breaker must not bedeformed by screw-fastening theconductor bars.

5.3 Locking of additional devices

If locking of other devices is to beactuated or controlled depending onthe circuit-breaker position, it mustbe ensured that the masses and for-ces acting on the units do not inter-fere with the switching characteri-stics of the circuit-breaker.

The torque load attacking on theswitch shaft must not exceed 2 Nm.

If circuit-breakers are equipped withswitch shaft extension and the latteris exposed to transverse forces, anadditional bracket bearing is requirednear the shaft end.

5.4 Pole partitions

If circuit-breakers are equipped withpole partitions (depending on thetechnical data), the latter are enclo-sed. The pole partitions must bemounted according to the enclosedattachment drawing.

12

5.5 Connecting the conductor bars

WARNING:Aluminium conductorbars must not be con-nected to silver-plated

connection areas of the circuit-breaker. Inadmissible matchingof materials.

NOTICE:Coat contact surfaces(refer to Annex).


Connection areas oncircuit-breaker

Connection areaon conductor bar or cable lug

Series VAA:Connection for 630AMaterial: Aluminiumbright

- Copper- Aluminium

Series VAA: Connection for 1250AMaterial: Aluminium, silver-plated

Series VA/VXC:Material: Copper, silver-plated

- Copper- Copper, silver-plated- Aluminium, silver-plated

In case of aluminium, metallically bright,use an intermediate layer of copper (thickness0.1 mm) corresponding to the fullsize of the con-necting area.To this effect, a 13% reduction ofthe rated (normal) current must be taken intoconsideration on principle, or an enquiry must besubmitted to the manufacturer.

Earth connectionMaterial: Steel

Selection acc. to HD 637 S1 or appropriate na-tional interpretation clause

(Connection areas are current conduction areas)

Material of current conductors or cable lugs for connection of the circuit-breaker

13

5.7 Connecting the control lines

The control lines are connected, de-pending on design, via control con-nectors or control lines to the termi-nal strips in the drive casing. Thecontrol lines are wired in the circuit-breaker up to the control connectoror up to the terminal strip.

Single-wire conductors or strandscan be connected

• to terminal strip up to 2,5 mm2

• in control connector up to 1,5mm2

Terminal with control connector

Push the control connector onto the64-pin right-angle plug-and socketconnector of the circuit-breaker, andlock it.

If connection to a terminal strip is possible:

1. Remove the cover plate.

2. Connect external control lines viathe terminal strip and route themto the outside through the cu-touts in the drive casing (Fig. 10).

The circuit diagram which is bin-ding for the system in question isglue-fastened on the inside of thecover plate.

If additional control lines are pla-ced in the drive casing, leave asufficient distance from the mo-vable parts of the drive.

3. After connecting the externalcontrol line, mount the cover pla-te.

NOTICE:Comply with the tighte-ning torques specifiedfor screw-fastening (re-fer to Annex).

5.6 Earth terminal

• Design and dimensioning of thecircuit-breaker's earth terminalacc. to IEC 62271-100.

• Select the cross section of andthe material used for the earthconductor according to HD 637S1 or the appropriate nationalwork instruction.

NOTICE:Coat contact surfaces(refer to Annex).


Connect earth conductor of stationto earth terminal of circuit-breaker(Fig. 9).

Protective earthing is also admissiblethrough the securing bolts on thepost insulators, if galvanized self-lok-king bolts whose toothing penetratesthe paint, are used as securing bolts.

Admissible thermally effective short-time current per self-locking boltM12:

- 4 kA (1 s)

- 2,7 kA (3 s)

1 2

Fig. 10

Cutout in drive casing

1 Cutout for control and auxiliary linesin drive casing

2 Connector (alternatively)

Fig. 9

Earth terminal

• Check circuit-breaker for externaldamage.

• Make sure that there are no ex-ternal parts in the circuit-breakercompartment.

• Check surface of insulating com-ponents for impurities. If neces-sary, clean, as described inChapter 8.

• Check assembly work

- Check securing bolts.

- Check the conductor bars'screw couplings using a tor-que wrench.

- Check the screw coupling ofthe earth terminal.

Perform functional tests

NOTICE:Observe the operatingand locking conditionsacc. to Chapter 7.

1.Charge energy-storing device usingthe crank.

Check the spring position indicator.

2.Switch circuit-breaker on and off se-veral times by hand. Check positionindicator.

3.Check electrical functions of controland operating devices.

NOTICE:The energy storing devi-ce of motorized circuit-breakers is charged au-

tomatically as soon as the mo-tor's auxiliary supply is applied.

Apply auxiliary voltage

Perform switching operations andcheck for proper working order byactuating the shunt release and theblocking coil.

Watch position indicator.

4.Check interlocks between circuit-breaker and other devices.

Commissioning6

14

Operation7

Name plate

Position indicator, energy-storing device charged/released

ON button

OFF button

Opening for crankto charge the

energy-storing device

Operations counter

Position indicator ON/OFF ("CLOSE/TRIP")

Fig. 11

Control panel

Pos. Position indicator

Energy-storing device(closing spring)

Position indicator

ON/OFF ("CLOSE/TRIP")Switch position

Opening spring possible operating sequence

1 released OFF (TRIP) released none

2 charged OFF (TRIP) released, is charged via C C - O

3 released ON (CLOSE) charged O

4 charged ON (CLOSE)charged, is re-charged viaC

O - C - O

Position indicators on circuit-breaker and possible operating sequences

15

C = Closing (ON)O = Opening (OFF)

7.1 Operator interface and operating elements

7.2 Charging the energystoring device

Manually

Initial position:

• Circuit-breaker in "OFF" position.

• Energy storing device "released"(Table, section 7.1, item 1)

Move circuit-breaker in "ready-for-closing" position

1. Insert crank into opening for ten-sioning the energy storing device

2. Perform approx. 35 turns (clock-wise) until position indicator"charged" appears (starting themotor during this procedure doesnot involve a danger).

3. After charging, remove the crank.The circuit-breaker is ready forclosing (Table, section 7.1, item2).

Via motor

The energy storing device of motori-zed circuit-breakers is charged auto-matically as soon as the motor's ra-ted supply voltage is applied.

7.3 Switching operations

NOTICE:The specific interlocksbetween the circuitbreaker and the panelmust be taken into ac-count.

Closing (ON)

• Push button "ON" - or

• apply voltage to shunt closing re-lease.

The position indicator shows theswitch position "ON" (Table, section7.1, item 3).

The position of the auxiliary switchhas changed.

The energy storing device can becharged immediately after switchingON (by hand or by motor). If voltageis applied to the motor, charging isperformed automatically.

• The position indicator shows theenergy storing device position"charged" (Table, section 7.1,item 4).

Opening (OFF)

• Push button "OFF" - or

• switch off via shunt opening re-lease, undervoltage release or se-condary coil.

The position indicator shows theswitch position "OFF" (Table, section7.1, item 1 or 2).

The position of the auxiliary switchhas changed.

16

8.1 General

The series VA, VAA and VXC vacu-um circuit-breakers do not requiremaintenance for a service life of over20 years.

In case of doubt or if deviations fromthe circuit-breaker's proper workingorder are detected, the manufacturershould be contacted.

A visual inspection of the circuit-breaker and switching tests are re-commended, depending on thestress imposed during operation andon the operating conditions, every 4years (VA, VAA) or yearly (VXC). Incase of dust deposits, the circuit-breaker must be cleaned by expertstaff.

WARNING:Comply with the safetyprovisions in section1.5!

For maintenance work, the circuit-breaker must not be disassembled,except in case of replacement asdescribed.

Once maintenance is complete, pro-ceed as described in Chapter 6"Commissioning".

8.2 Cleaning insulatingcomponents

Cleaning of plastic and ceramicparts:

- Partitions

- Post insulators

- Operation rods

- Pull straps

- Ceramics of vacuum interrup-ter chambers

Clean by means of a dry, lint-freecloth. Depending on dirt collected,replace cloth as often as necessary.

Servicing8

Maintenance interval Maintenance work

Series VA, VAA Series VXC

Every 10,000 operating cy-cles (max. 30,000 operatingcycles)

Handle circuit-breaker drive andcircuit-breaker pole acc. to thelubrication instructions, sect. 8.5.

-

Every 25,000 operating cy-cles (max. 75,000 operatingcycles)

-

• Handle circuit-breaker drive and circuit-breakerpole acc. to the lubrication instructions, sect. 8.5.

• Replacement of control and operating devicessubject to consultation of the manufacturer (referalso to section 8.6)

• ECO Exchange Program subject to consultationwith the manufacturer

Once the summation currentlimit has been reached (referto section 8.4)

Replace circuit-breaker poles subject to consultation with the manufacturer (replace-ment instructions are available on request).

8.3 Servicing schedule

17

IIrr = Rated (normal) current [A]

IISSCC = Short-circuit breaking current [kA]

Vacuum circuit-breaker VA, VAA

8.4 Numbers of breaking operations up to summation current limit

Vacuum circuit-breaker VXC

IIrr [A]IISSCC [kA]

25 31,5 40 50

630 x

1250 x x x

1600 x x x x

2000 x x x x

2500 x x x x

Vacuum circuit-breaker Type VA

Vacuum circuit-breaker Type VAA

Vacuum circuit-breaker Type VXC

n

30 000

10 000

1000

100

10

50

500

5000

I SC

Rated normal current I 630 A, 1250 A, 1600 A, 2000 A, 2500 A

Num

ber o

f bre

akin

g op

erat

ions

I r

r

IaBreaking current log

n

25 000

10 000

1000

100

10

50

500

5000

I SC

Rated normal current I 1250 A, 2500 A

I r

50 000r

Num

ber o

f bre

akin

g op

erat

ions

IaBreaking current log

IIrr [A]IISSCC [kA]

16 20 25

630 x x

1250 x x x

IIrr [A]IISSCC [kA]

25 31,5

1250 x x

2500 x x

18

The diagrams define exclusively theadmissible summation current limit.They indicate whether the vacuuminterrupter chambers need to be re-placed.

Depending on the rated normal vol-tage, not all the combinations shownmay be possible.

The data for the rated normal currentand short-circuit opening current areindicated on the rating plate.

NOTICE:Due to the further developmentand operating experience re-garding vacuum interrupterchambers, contact erosion in-spection is no longer conside-red.

8.5 Lubrication instructions

WARNING:Comply with safety pro-visions (section 1.5).

Coat circuit-breaker poles with oil:

Liquid lubricant FL for bearings,joints and guide systems.

Pour drops of liquid lubricant (oilcan, drip feed lubricator) into the be-aring gap. Liquid lubricant gets bet-ween the bearing surfaces due tothe capillary effect. In case of inac-cessible lubrication points, use anextension tube or spray.

Fig. 12

Circuit-breaker pole VA, VXC, bottom, points of lubrication

Fig. 13

Circuit-breaker pole VAA, bottom, points of lubrication

19

Greasing the drive:

Release front cover via 5 bolts.

WARNING:Comply with safety pro-visions (section 1.5).

The following elements must not belubricated:

- Spring charging mechanism

- Motor

- Ball bearings and sliding be-arings

- Shunt closing release

- Shunt opening release

- Push switch ON - OFF

- Initiator "energy storing device"

- Auxiliary switch

- Plungers of tripping coils

Fig. 14

Overview of points of lubrication in drive (for a schematic view, refer to the following page)

20

Lubrication procedure

Lubricant KL for surfaces slidingupon one another.

Clean lubricating points, e.g. using alint-free cloth or a soft paint-brushand detergent (use sparingly, justwet points of lubrication).

Apply a thin coat of lubricant KL,using e.g. a paintbrush.

Liquid lubricant FL for bearings,joints and guide systems.

Pour drops of liquid lubricant (oilcan, drip feed lubricator) into the be-aring gap. Liquid lubricant gets bet-ween the bearing surfaces due tothe capillary effect. In case of inac-cessible lubrication points, use anextension tube or spray.

8

7

54

6

3

2

1

9

1011

Fig. 15

Points of lubrication and lubricant in the drive

21

8.6 Replacement of control and operating devices

The following electro-mechanicalcomponents may be replaced in thecircuit-breaker's drive as requiredand subject to consultation with themanufacturer:

• Motor

• Anti-pumping relay

• Blocking coil

• Shunt closing release

• Shunt opening release

• Secondary coil

• Undervoltage coil

For replacement of the components,you must release (5 screws) and re-move the front cover.

The appropriate subcomponents canbe released to facilitate access tothe above-mentioned components.

WARNING:Refer to the safety pro-visions in section 1.5!

NOTICE:Compare the label onthe terminal strip to theauxiliary voltage data.

Motor

NOTICE:Check the technicaldata on the motor's ra-ting plate.

Replacement:

1. Disconnect and mark the feederwires.

2. Release the three motor securingbolts and pull motor out of itscentering in axial direction.

3. Insert the brand-new motor intothe centering and screw it downusing the securing bolts.

4. Connect the feeder wires.Comply with the marking!

Anti-pumping relay

Replacement:


2. Release the two securing boltsand remove the relay.

3. Insert and secure brand-new re-lay.


Fig. 16

Motor

22

Fig. 17

Anti-pumping relay

Blocking coil

Replacement:


2. Release the two securing boltsand remove the blocking coil.

3. Insert a brand-new blocking coiland adjust it as described below:

4. Secure the blocking coil.

5. Connect the feeder wires. Com-ply with the marking!


Replacement:


2. Expel the lock pin, release thetwo securing bolts and removethe auxiliary switch.

3. Bore the hole in the magnetmounting plate of the brand-newshunt closing release to Ø3 H11for the lock pin.

4. Insert and screw-fasten shuntclosing release, but do not yettighten it.

5. Adjust the shunt closing release:

6. In this position, tighten the secu-ring bolts and secure the magnetmounting plate by means of pins.

7. Connect the feeder wires. Com-ply with the marking!

23

Fig. 18

Blocking coil

1

2

3

4

5

Fig. 19

1 Blocking coil2 Angular bracket3 Securing bolts4 Adjust angular bracket (2) using the

securing bolts (3) so that the magnetarmature (5) protrudes over the an-gular bracket by 0 to 1 mm.

Fig. 20


1

23

4

5

Fig. 21

1 Shunt closing release2 Semi-shaft3 Clamping lever4 The appropriate semi-shaft has just

been "unlatched". The plunger of thetripping coil is 2 - 3 mm away fromits final position.

5 The clamping lever rests loosely onthe plunger (air gap, approx. 1 mm).

4. Adjust release:

Shunt opening release, secondary release, lowvoltage release

Replacement:


2. Release the two securing boltsand remove the auxiliary release.

3. Insert and screw-fasten brand-new shunt opening release, se-condary coil or undervoltage re-lease.

5. In this position, tighten nut ofclamping lever.


24

Text TextTEXT

Text

Text

Text

A: Release attachment with releasing device B: Release attachment directly onto semi-shaft

1 1

2 3

1 1

4

4

Fig. 22

1 Shunt opening release2 Secondary release3 Lowvoltage release4 Semi-shaft

1

23

4

5

Fig. 23

1 Shunt opening release2 Semi-shaft3 Clamping lever4 The appropriate semi-shaft has just

been "unlatched". The plunger of thetripping coil is 2 - 3 mm away fromits final position.

5 The clamping lever rests loosely onthe plunger (air gap approx. 1 mm).

Annex9

25

9.1 Accessories

9.2 Auxiliary products

The auxiliary products are availablefrom AREVA Sachsenwerk GmbH.

The use of other auxiliary products isnot admissible.

Designation Order no.

Lubricant KL0.5-kg can S 008157

Liquid lubricant FL0.5-kg can S 008153

Cleaning agent1l can

S 008152

Designation Order no.

Manual crank AGS 617 810-01

Threadsize

Tightening torque[Nm]

min. max.

M6 7 9

M8 16 24

M10 36 44

M12 63 77

M16 153 187

Threadsize


min. max.

M6 12,5 15,5

M8 32 40

M10 65 79

M12 90 110

M16 243 297

Threadsize


min. max.

M6 0,7 0,9

M8 1,5 2

M10 3 3,9

M12 5,1 6,7

M14 7,6 9,9

M16 10,2 13,2

Table 1:Hex. bolts and socket-head caps-crews (except slotted screws) andnuts (except self-locking nuts)

Table 2:Self-locking bolts and nuts

Table 3:Plastic screws and nuts (Partition at-tachment). No preliminary treatmentof the thread

Threadsize


min. max.

M6 4,5 6,5

M8 10 14

M10 20 27

M12 40 56

M16 80 108

Table 5:Screw coupling between switchingdevice and conductor bar with con-ductor material copper

Threadsize


min. max.

M6 5,5 7,5

M8 15 19

M10 30 40

M12 60 76

Table 4:Screw coupling between switchingdevice and conductor bar with con-ductor material aluminium

9.3 Screw couplings

The following elements must beused for all metal screw couplings:

• Screws and bolts:Grade > 8.8

• Nuts:Grade 8

26

9.4 Treatment of firmlyscrew-connectedcontact surfaces

Contact surfaces must be subjectedto preliminary treatment beforescrew-fastening.

1. Clean

– use a lint-free cloth,

– in case of severe contaminati-on: use detergent.

2. Polish to achieve a bright surface

(A) – use emery cloth (grain size 100 or finer)

– or use a steel brush which is only used forcopper

(B) – use emery cloth (grain size 100 or finer)

– or use a steel brush which is only used foraluminium

(C) remove any existing passiva-tion using a steel brush which is only used for steel.

3. Immediately after cleaning thematerial metallically bright, coat itwith lubricant KL so that the spa-ce between the contact surfacesis completely filled once thescrews have been fastened.

Material of contactsurfaces

Pre-treat-ment

Copper, silver-plated -

Copper A

Aluminium, silver-plated

-

Aluminium B

Steel or steel, galvanized

C

AREVA Sachsenwerk GmbH · Rathenaustraße 2 · D-93055 Regensburg · Postfach 10 01 55 · D-93001 RegensburgPhone +49 (0)9 41/46 20-0 · Fax +49 (0)9 41/46 20-4 18

Our policy is one of continuous development.Accordingly the design of our products may changeat any time. Whilst every effort is made to produce upto date literature, this brochure should only beregarded as a guide and is intended for informationpurposes only. Its contents do not constitute an offerfor sale or advice on the application of any productreferred to in it. We cannot be held responsible forany reliance on any decisions taken on its contentswithout specific advice.

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