HVX

0

HVXVacuum circuit-breaker≤ 17,5 kV (> 2500 A / ≤ 50 kA)

InstallationOperationMaintenance

No. AGS 531 461-01

Edition 06/07

AREVA T&D

Technical instruction

MEDIUM VOLTAGE SWITCHING DEVICE

Manufacturer:

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

Service:

Should you have any queries as to ourservice, please contact:

Service-CenterD-93055 Regensburg� +49 (0)9 41/4620-777� +49 (0)9 41/4620-778

AREVA Energietechnik GmbHSachsenwerk Medium Voltage

AREVA Energietechnik GmbHSachsenwerk Medium Voltage

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

AREVA T&DT&D Worldwide Contact Centre

© AREVA Energietechnik GmbH, Sachsenwerk Medium Voltage -2007-All rights reserved to this technical instruction.Reproduction and making available of this technical instruction, or extracts, to third parties are prohibited. Only integral reproduction of this technical instruction is permitted with the written permission from AREVA Energietechnik GmbH,Sachsenwerk Medium Voltage. Electronic copies in e.g. PDF-format or scanned version have the status “for information only” .The only valid version of technical Instructions are always enclosed directly to the product in question by the factory.

1 Regulations and Provisions 41.1 Remarks on this Technical Instruction 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 Variants 6

3 Technical data 83.1 Type designation 83.2 Technical data 83.3 Control and operating devices 9

4 Shipping instructions 114.1 Packaging 114.2 Delivery 114.3 Storage 114.4 Transport 11

5 Assembly 125.1 Instructions for assembly 125.2 HVX-F – Mechanical assembly 125.3 HVX-E – Mechanical assembly 145.4 Connecting the control lines 15

6 Commissioning 166.1 HVX-E (withdrawable unit) 176.2 HVX-F (fixed type) 17

7 Operation 187.1 Control elements and operator interface 187.2 Interlocks 197.3 Charging the energy storing device 197.4 Switching the circuit breaker 207.5 Actuate withdrawable part 21

8 Servicing 228.1 Safety 228.2 Servicing schedule 228.3 Cleaning insulating components 238.4 Corrosion protection 238.5 Avoid condensation 238.6 Lubrication instructions 248.7 Maximum admissible number of breaking

operations of the vacuum chambers 27

9 Annex 289.1 Accessories 289.2 Auxiliary products 289.3 Screw fastenings 299.4 How to treat the contact surfaces 29

Content

3

1.3 Use in line with theintended purpose

The HVX vacuum circuit-breaker isintended exclusively as a switchingunit in air-insulated medium-voltageswitchgear. It may only be used inthe scope of the specified standardsand the switchgear-specific techni-cal data. Any other use constitutesimproper use and may result in dan-gers and damage.

Important:Operating reliability andservice life depend on cor-rect operation.

Disclaimer of liability

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

• instructions in this Technical In-struction are not complied 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.

1.2 Terms and symbols used

This Technical Instruction uses cer-tain terms and symbols. They warnabout dangers or provide importantinformation which must be compliedwith at all costs so as to avoid dan-ger and damage:

„Warning“This warning symbol in-dicates dangerouselectrical voltage. Con-

tact with voltage may result infatal injury!

„Warning“This warning symbol in-dicates danger of inju-ry. Observe alle instruc-

tions that are labeled with thissign to avoid death or seriousinjury.

„Important“This notice symbol is usedfor information which is im-portant to avoid damage.

1.1 Remarks on this Technical Instruction

This Technical Instruction describestransport, assembly, operation, hand-ling and maintenance of the seriesHVX vacuum circuit breakers.

It must be stored so that it is at anytime readily accessible and can beused by persons who work on thecircuit-breaker or the switchgearwith this circuit-breaker.

When re-selling the circuit-breakeror the switchgear with circuit-brea-ker, make sure that this Technical In-struction is transmitted as well.

The following additional documentsmust be observed for this circuit-breaker:

• Purchase agreement containingthe stipulations on the specificequipment of the circuit-breakerand the legal details.

• The contract specific circuit brea-ker wiring diagram / documentati-on

• Project notes regarding the HVXcircuit breaker

• For assembly and operation ofthe circuit-breaker, the operatingmanual of the switchgear inwhich it is operated must becomplied with.

As our products are subject to conti-nuous further development, we re-serve the right to changes regardingstandards, illustrations and technicaldata.

All dimensions not specified in detailare in millimeters.

1 Regulations and Provisions

4

1.4 Applied standards

The three-pole HVX vacuum circuit-breaker

• 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)

• corresponds, as a withdrawableunit, to IEC 62271-102.

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

HVX circuit-breakers may only beoperated under normal operatingconditions acc. to IEC 60694. Ope-ration under conditions deviatingfrom these is only admissible uponconsultation and with the written ap-proval of the manufacturer.

1.5 Safety provisions

The work described in this TechnicalInstruction may only be performed byspecialist electricians who have pro-ved their experience with the HVXcircuit-breaker and all relevant Safetyprovisions.

Applicable standards and regulati-ons:

• The locally applicable accidentprevention, operating and workinstructions must be compliedwith.

• Installation 2):IEC 61936-1 / HD 637 S1

• Operation of electrical equip-ment 2): EN 50110-1

2) The national standards applicable inthe country where the equipment isto be installed must be compliedwith.

Read these instructions carefully be-fore you work on the circuit-breaker,and perform the work detailed in itaccording to the descriptions. Donot perform any work on the circuit-breaker which is not described inthis Technical Instruction.

Warning!Before starting work onthe circuit-breaker, de-energize the system,verify it for zero voltage

and earth the system accordingto the applicable safety rulespursuant to EN50110-1.

Warning!Before performing workon the circuit-breaker,switch off the supplyvoltage and prevent it

from reclosing.

Warning!There is a risk of injurywhen working on thedrive mechanism.

Before commencing work, re-lease the energy-storing deviceby performing the operating se-quence OFF-ON-OFF and re-mount the drive´s transport se-curing device (see Chapter 6).

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 HVX vacuum circuitbreaker.

Disposal at the end of the service lifeis performed as a service by the Ser-vice Center at the manufacturer'swhich is subject to a fee. Pleasecontact the Service Center (seepage 2).

Ambient conditions

Temperature class"minus 5 indoors" 1)

Ambient temperaturemin./max.

-5 / 40oC 1)

Average value over 24hours (max.)

35oC 1)

Max. installation altitu-de above sea level

1000 m 1)

1) higher values on request

5

1

2

3

4

5

6

7

89

10

11

12

13

14

16

15

Fig. 2.1Vacuum circuit breaker HVX-F – fixed type

2 Variants

6

1 64-pole low-voltage terminal

2 Information plate for commissioning

3 User interface

4 Switch circuit-breaker ON

5 Switch circuit-breaker OFF

6 Handles (optional)

7 Nameplate

8 Position indicator of closing spring

9 Position indicator of circuit breaker

10 Insertion opening for manual char-ging of the closing spring

11 Operation counter

12 Press rod (transfer of ON/OFF swit-ching movement)

13 Drive casing

14 Vacuum interrupter chamber

15 Conductor bar terminal

16 Pole partitions

1

2

3

7

9

10

11

12

13

14

Fig. 2.2Vacuum circuit breaker HVX-E with withdrawable part for PIX switchgear panels

1 Low-voltage terminal2 Information plate for commissioning3 User interface4 Position indicator - withdrawable

part in service position5 Position indicator - withdrawable

part in disconnected position6 Lever for locking/unlocking the with-

drawable part in the panel7 Insertion opening for manual racking

in/out the withdrawable part8 Slide for opening the insertion ope-

ning (7) for manual racking the with-drawable part in and out manually

9 Withdrawable part´s rollers10 Withdrawable part11 Press rod (transfer of ON/OFF swit-

ching movement)12 Vacuum interrupter chamber13 Moving contacts14 Pole partitions

1

2

3

45

6

78

9

10

11

12

13

14

Fig. 2.3Vacuum circuit breaker HVX-E with withdrawable part for PIX high current switchgearpanels

7

3 Technical data

3

4

1

2

Rated voltage Ur [kV] 12 17,5

Rated lightning impulse withstand voltage Up [kV] 75 95

Rated power frequency withstand voltage Ud [kV] 28 38

Rated operating current Ir max. [A] 3150 1)

Rated cable-charging breaking current Ic [A] 25 31,5

Rated short-circuit breaking current Isc max. [kA] 50

Rated short-time current Ik max. [kA] 50 (3 s)

Rated frequency fr [Hz] 50/60

8

3.1 Type designation

The type designation on the name-plate (Fig. 2.1) specifies essentialtechnical data. The type designation(1) is broken down in this example.

The following data on the nameplateare relevant for replacement or incase of any queries:

• Type designation (1)

• Serial number (2)

• Year of construction (3)

Fig. 2.1 Nameplate 1 Type designation 2 Serial number 3 Year of construction 4 Technical data

3.2 Technical data

1) Higher rated currents possible on request (with fan)

Example HVX 12 - 50 - 12 - E

Series HVX

Rated voltage 12 kV

Rated short-circuit breaking current 50 kA

Rated normal current 1250 A

F: fixed type E: Withdrawable unit

The circuit breaker has been desi-gned on principle so as to permitmanual operation.

The drive mechanisms of the indivi-dual switching devices can beequipped, depending on the specificcustomer's model, with additionalelectrical control and operating devi-ces. These are defined in the circuitbreaker-specific wiring diagram ( seeseparate documentation).

Component fitting options:

Motor

• for charging the energy-storingdevice (spiral spring)

• HVX-E: electric actuation of thewithdrawable part

Closing release

• 1 ea.

Opening release

• 3 ea. max.

Secondary release (Transformer-operated release)

• 1 ea. max.

Maximum equipment opening releaseand secondary release: 3 units in to-tal

Undervoltage release (optional)

• 1 ea.

Blocking coil

• Blocking coils prevent the circuitbreaker from being closed andopened via the push-buttons"ON" or "OFF", as well as manualactuation of the withdrawablepart. If the rated supply voltage hasfallen or is shut off, all blockingcoils are in "blocked" position.

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").

Power consumption, solenoids and motor

Solenoids/motor Power consumption [W]

Closing release < 250

Opening release < 250

Undervoltage release 15

Secondary release 12

Motor for energy-storage device for withdrawable part

150< 200

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

Operating times for solenoids and motor

Minimum command time "OFF" el. tripping [ms] 20

Minimum command time "ON" el. tripping [ms] 20

Motor charging time [s] 4 – 12

9

3.3 Control and operating devices

Overview of rated supply voltages

Direct voltage DC [V] 24 48 60 110 125 220

Alternating voltage AC [V] (110) / 120 (220) / 230

Other switching functions of the au-xiliary switch can be set by adjusta-ble cams (Fig. 2.2).

Important:The auxiliary switches mayonly be set by specialistswho dispose of experience

regarding the auxiliary switches in-stalled. Auxiliary switches must notbe disassembled.

10

Nocken

Blickrichtungfür die Einstellung

Auxiliary switch

Auxiliary switches are always actua-ted directly by the switch shaft via anintermediate linkage. Their positionalways corresponds to that of themain contacts.

The switching functions have beenset in the factory according to thecircuit diagram.

Rated supply voltageDC AC

[V] 24 48 60 110 220 120 230

Switching capacity [A] 8 4 3 2 1 10

Time factor T=L/R [ms] < 20 –

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

Rated continuous current [A] 10

Fig. 2.2Setting the cams of the auxiliary switch

Rated supply voltage

DC AC

[V] <48 125 220 120 230

Switching capacity [A] 10 3,8 2 10

Time factor T=L/R [ms] 10 20 –

Rated short-timecurrent

250 A / 3 s

Rated continuouscurrent

[A] 15

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

Cam

Viewing direction foradjustment

Technical data of auxiliary switches on the withdrawable part for PIX high current panels

Auxiliary switch on the withdrawable part for PIX high current panels

4.1 Packaging

• As standard, the switching devi-ces are packed in cardboard bo-xes and fastened on a pallet bymeans of two plastic straps.

• For sea transport, several card-board boxes are additionally pak-ked in a closed crate (also incontainer transport). The crate ishot-sealed in aluminium foil withdesiccant.

4.2 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 discrepancies.

4.3 Storage

If the switching devices are not in-stalled immediately upon delivery,they can be stored for max. 2 years ifpacked in hot-sealed aluminium foilwith desiccant. The ambient conditi-ons for storage must comply with theadmissible operating conditions.Protect circuit breakers and acces-sories against condensation.

Warning!Sufficient stability andevenness of the sup-porting area (floor)must be ensured.

Type HVX Weight [kg]

fixed type 230

withdrawable unit 330

(Guide values without packaging)

4 Shipping instructions

11

4.4 Transport

Transport using a forklift truck:

Only transport the circuit-breaker ona pallet.

Transport without pallet:

Lift circuit-breaker acc. to Fig. 4.2. 3 ropes (not metallic steel cables) Ø 12 to 15 mm or straps are requi-red to this effect.

Warning!Make sure the rope orstrap is strong enoughto bear the weight of

the circuit-breaker.

Important:HVX-E circuit-breakers withguide rollers on the withdra-wable part (see also Fig. 5.4)

must be placed on wooden bars orrails as shown in Fig. 4.1 in ordernot to damage the guide rollers.

2

1

≥ 20

Fig. 4.1Lifting and depositing the HVX circuit-breaker1 Guide rollers (only on the withdrawable part for PIX panels and for pole center

spacing of 254)2 Wooden bars or rails as base

Warning!Observe the safety pro-visions of chapter 1.5.

Warning!Risk of injuries.The energy storing de-vice must not be char-

ged until assembly is finished.

5 Assembly

• Dimension drawings are madeavailable on request.

• Check technical data on name-plate.

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

The vacuum circuit-breakers HVX-Fand HVX-E are delivered in comple-tely assembled and ready-to-operatecondition. They are supplied in posi-tion "OFF" and with the energy sto-ring device "released".

5.2 HVX-F – Mechanical assembly

Screws and attachments are not in-cluded in the scope of supply.

Fastening the circuit-breaker

Warning!The frame being usedmust be suitable tobear the weight of the

circuit-breaker (see Chapter 4).

Dimensions and arrangement of fas-teners: see dimension drawing.

Important:Comply with the specifiedtightening torques (refer toAnnex).

Make sure not to distort the circuit-breaker when screw-fastening it.

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.

Fig. 5.1HVX-F

Important:Coat contact surfaces andcomply with the specifiedtightening torques (refer toAnnex).

Connect earth line to the circuit-breaker housing (see dimensiondrawing).

12

5.1 Instructions for assembly

Connecting conductor bars

Important:Aluminium conductor barsmust not be connected tosilver-plated connection

areas of the circuit-breaker. Inadmis-sible matching of materials.

Important:Coat contact surfaces andcomply with the specifiedtightening torques (refer toAnnex).

• Take account of DIN 43 670 andDIN 43 671 regarding the di-mensioning for continuous cur-rent.

• Maximum distance of the nextsupport point from the circuit-breaker’s terminals in the directi-on of the switch pole axis. 3 xthe pole center spacing of thecircuit-breaker (unless the nextsupporting point is located in thedirection of the switch pole axis,make sure that the circuit-brea-ker pole is not exposed to higherelectrodynamic forces).

• Screw-fasten conductor bar(take account of DIN 43 679).

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

Connection areas

on the circuit-breaker on the conductor bar

Silver-plated copper Copper or silver-plated copperIn case of aluminium:use an intermediate layer of copper (thickness0.1 mm) corresponding to the full size of theconnection area (reduction of rated normalcurrent by 13 %)

60

30

50 90

340

M12Einschraub-tiefe 15-22 mm

Fig. 5.2High-voltage terminal for the HVX-F

13

M 12Thread reach15 – 22 mm

A transport truck (optional) is usedto rack the circuit-breaker into theswitchgear panel (Fig. 5.6). For thedesign and method of operation ofthe transport truck used, please referto the instructions for the panel inquestion.

Placing the circuit-breaker on transport truck and racking it into the switchgear

Important:When performing the follo-wing assembly steps, ob-serve and comply with the

instructions given for the panel used.

Important:Optionally, HVX withdrawa-ble units and panels maybe coded to match (Fig.

5.4). This is to prevent a withdrawa-ble unit from being racked comple-tely into the panel if the rated datado not match.

1. Check the ratings indicated onthe nameplate between theHVX-E and the appropriate pa-nel.

2. Place the circuit-breaker on thetransport trolley rails.

3. Lock the circuit-breaker on thetransport trolley.

4. Couple the transport trolley tothe panel.

5. Unlock the circuit-breaker fromthe transport trolley and rack thecircuit-breaker into the panel.

– HVX withdrawable units forPIX panels must latch intothe lock rocker of the panels(Fig. 5.4).

– HVX withdrawable units forPIX High Current Panels areanchored in the panel by ac-tuation of the withdrawablepart interlock (Fig. 5.5).

6. Release the transport trolleyfrom the panel.

Fig. 5.3Transport truck with HVX-E circuit-breaker in front of the panel

14

1 Spindle of the withdrawable part2 Spindle nut of withdrawable part

(must be latched in the cell)3 Circuit-breaker coding4 Guide rollers

1

2

3

4

5.3 HVX-E – Mechanical assembly

Fig. 5.5Withdrawable part locking device in pa-nel

Fig. 5.4Bottom of a HVX-E circuit breaker for PIX switchgear panels

The control lines are connected, de-pending on design, via control con-nectors (Fig. 5.9 and 5.10) or con-trol lines to the terminal strips in thedrive casing. The control lines arewired in the circuit-breaker up to thecontrol connector or up to the termi-nal 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-(36-) pin right-angle plug-andsocket connector of the circuit-brea-ker, and lock it (Fig. 5.9 und 5.10).

Important:Connector interlock in caseof HVX-E: The control con-nector on the panel can

only be inserted or removed whilethe circuit-breaker is in disconnec-ted position.

Connection to terminal strip

1. Remove the cover plate.

2. Connect external control lines viathe terminal strip (Fig. 5.11). Thevalid wiring diagram has been en-closed with each circuit-breaker.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.

Important:Comply with the tighteningtorques specified forscrew-fastening (refer toAnnex).

1

Fig. 5.111 Control connection on terminal strip

15

Fig. 5.6Equipotential bonding within the cell

Optionally, the HVX-E circuit-breakeris available with short-circuit proofearthing (Fig. 5.7 und 5.8).

1

Fig. 5.71 Earth bar at the HVX-E for PIX

switchgear panels

5.4 Connecting the control lines

1

Fig. 5.81 Earth bar at the HVX-E for PIX high

current switchgear panels

1 2

Fig. 5.9Control connector, 64-pin 1 Insert control connector2 Lock

Fig. 5.10Insertion of the control connector, 36-pin

Earth terminal

The switching device potential is lin-ked to the panel via the four wheelsof the withdrawable part (Fig. 5.6).

• 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 (see Chapter 8).

Important:Observe the operating andlocking conditions (Chap-ter 7).

Important:The energy storing deviceof motorized circuit-brea-kers is charged automati-

cally once the supply voltage is ap-plied.

Important:Undervoltage releases (op-tional) enable switchingtests only to be performed

with the supply voltage applied.

6 Commissioning

1

3

2

Important:Observe the warning andnotification plates on thefront cover and in the drive(Fig. 6.1).

The circuit-breaker is equipped witha transport securing device in thedrive (Fig. 6.1). Remove transportsecuring device before commissio-ning:

Remove transport protection

1. Remove front cover.

2. Remove transport securing devi-ce (red) by releasing the thread-cutting screw M5 using a wrenchof TORX-Nr. T25 (Fig. 5.2). Storethe device for maintenance work.

3. Secure front cover again usingthe screws. Tightening torque:4.7 Nm + 15 %.

Fig. 6.1Remove transport securing device in the drive1 Front cover2 Transport protection3 Label with instructions for commissioning

16

6.1 HVX-E (withdrawable unit)

Perform functional tests:

1. Charge energy-storing deviceusing the crank. Check the springposition indicator.

2. Switch circuit-breaker on and offseveral times by hand. Check po-sition indicator.

3. Move the withdrawable part to itsservice and disconnected positi-on via the crank handle. Check mechanical interlocks bet-ween the HVX-E and the cell.Check position indication.

4. Check electrical functions of con-trol and operating devices. Apply supply voltage.

5. Actuate the releases to performswitching operations and checkfunctions/interlocks. Watch posi-tion indicators.

6. Rack the circuit-breaker in andout via the motor-drive (optional).At the same time, check the posi-tion indicators and the interlocksin the circuit-breaker and with re-gard to other devices.

6.2 HVX-F (fixed type)

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:

1. Charge energy-storing deviceusing the crank. Check the springposition indicator.

2. Switch circuit-breaker on and offseveral times by hand. Check po-sition indicator.

3. Check electrical functions of con-trol and operating devices. Apply supply voltage.

4. Actuate the releases to performswitching operations and checkfunctions / interlocks. Watch position indicators.

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

17

7.1 Control elements and operator interface

1

2

3

4

Fig. 7.3Control elements for the circuit-breakerHVX-E in PIX switchgear panels

Sachsenwerk Type HVX 24 -16 -00 -21NO SW1 3340121001 1999U 24 kV Im 800 A / 50/60 HzUm 125 kV Isc 16 kA /th 3 s

0 - 3min - 00-3min-00

Made in Germany

00215

HVX

0 l

Fig. 7.1Operator interface of HVX circuit-breaker

1 closed door of switchgear panel 2 ON/OFF operating rod

3 Spring charging crank for energystoring device

4 Moving crank handle for withdrawa-ble part

1

3

2

Fig. 7.2Control elements for the circuit-breakerHVX-F

7 Operation

18

1

2

3

4

Fig. 7.4Control elements for the circuit-breakerHVX-E in PIX high current switchgearpanels

button (rocker “O”) or pushbutton “O”to switch circuit breaker OFF (open)

button (rocker “I”) or pushbutton “I” toswitch circuit breaker ON (close)

Nameplate

Operation counter

Position indicator of circuit breaker

Position indicator of closing spring

Insertion opening for charging theenergy storing device

7.2 Interlocks

Warning!You must be familiarwith these interlocksbefore operating thecircuit-breaker.

19

Fig. 7.5Turn spring charging crank until the po-sition indicator of the energy storage de-vice indicates "charged".

Via motor

The energy storing device of motori-zed circuit-breakers is charged auto-matically as soon as the supply vol-tage is applied.

Manually

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

1. Insert crank into opening for ten-sioning the energy storing device(Fig. 7.5).

2. Charge the spiral spring usingthe spring charging crank. Assoon as the spiral spring is char-ged, the spring charging mecha-nism is decoupled and the positi-on indicator signals "charged"(Fig. 7.5). If the motor starts du-ring this process, this does notconstitute a risk.

3. Remove crank. The circuit-brea-ker is ready for closing (table inchapter 7.4, Pos. 2).

7.3 Charging the energy storing device

Mechanical interlocks

The HVX switch features basic inter-locks to prevent operating errors.

Electrical interlocks

have been designed according tothe circuit diagram.

Interlock Function of interlock Method of operation of interlock

Between the circuit-breakerwithdrawable part and thelow-voltage connector

Switch cannot be moved into service position un-less the low-voltage connector is inserted and lok-ked

The opening for the moving crankhandle is locked

The low-voltage connector can only be inserted orremoved while the withdrawable part is in its dis-connected position

The interlock between low voltageconnector and the withdrawablepart is activated

Between the circuit-breakerwithdrawable part and theearthing switch

The withdrawable part cannot be moved to serviceposition in while the earthing switch of the switch-gear panel is in "ON" position

The moving crank handle is uncou-pled automatically

The earthing switch cannot be switched on oncethe withdrawable part has left its disconnected po-sition

The earthing switch cannot beswitched on. Do not apply force!

Between the circuit-breakerand the withdrawable part

Circuit-breaker cannot be moved to service/discon-nected position while it is switched on

The opening for the moving crankhandle is locked

The circuit-breaker cannot be switched on unless – it is completely set to its service/ disconnected

position and – the actuating crank for the withdrawable part

mechanism has been removed

The circuit-breaker cannot be swit-ched on or off

Opening (OFF)

• Push button "OFF" (O) or

• actuate via opening release or

• by undervoltage release or se-condary release

The position indicator shows theswitch position "OFF" (table item 1or 2).

The position of the auxiliary switchhas changed.

20

Closing (ON)

• Push button "ON" (I) or

• actuate closing release electrical-ly

The position indicator shows theswitch position "ON" (table item 3).

The position of the auxiliary switchhas changed.

The energy storing device can becharged immediately after switchingON (by hand or by motor). If supplyvoltage is applied to the motor, char-ging is performed automatically. The position indicator shows theenergy storing device position "char-ged" (table item 4).

l 0

7.4 Switching the circuit breaker

Position indicators on circuit-breaker and possible operating sequences

C = Switching ON O = Switching OFF

Item Position indicator

Energy-storing device (closing spring)

Position indicator

ON/OFF Switch position

possible operating sequence

1 released OFF none

2 charged OFF C - O

3 released ON O

4 charged ON O - C - O

Important:Observe interlock conditi-ons (see chapter 7.2).

7.5.1 Withdrawable part for PIX switchgear panels

Move circuit-breaker from disconnected into service position by hand:

Initial situation: Circuit-breaker OFF Earthing switch OFF

1. Insert crank handle with integra-ted slip coupling (Fig. 7.6) andmove it clockwise to its stop oruntil the slip coupling reacts; thecircuit-breaker is racked into itsservice position. Observe the po-sition indicator on the switchgearpanel.

2. Remove crank handle.

Move circuit-breaker from service into disconnected position by hand:

Initial situation: Circuit-breaker OFF

1. Insert crank handle with integra-ted slip coupling (Fig. 7.6) andmove it counter-clockwise to itsstop or until the slip coupling re-acts; the circuit-breaker is rackedinto its disconnected position.Observe the position indicator onthe switchgear panel.

2. Remove crank handle.

Fig. 7.6Crank handle to rack the circuit-breakerin and out

Move circuit-breaker from disconnected into service position by hand:

Initial situation: Circuit-breaker OFF Earthing switch OFF

1. Push interlocking slide (Fig. 7.7,item 1) to the left to free the in-sertion opening.

2. Insert crank (2) and turn it clock-wise to its stop. The circuit-brea-ker moves into service position.The position indicator must indi-cate "I" (3).

3. Remove crank.

7.5 Actuate withdrawable part

Fig. 7.7Moving the withdrawable part in PIX High Current Panels1 Interlocking slide to free the insertion opening2 Crank3 Position indicator “I”: Withdrawable part in service position4 Position indicator "O": Withdrawable part in disconnected position

1

2

3

4

7.5.2 Withdrawable part for PIX high current switchgear panels

Move circuit-breaker from service into disconnected position by hand:

Initial situation: Circuit-breaker OFF

1. Push interlocking slide (Fig. 7.7,item 1) to the left to free the in-sertion opening.

2. Insert crank (2) and turn it coun-ter-clockwise to its stop. The cir-cuit-breaker moves into discon-nected position. The position in-dicator must indicate "O" (4).

3. Remove crank.

21

7.5.3 Motor drive in the withdrawable part

Enter command to the local or remo-te control. Observe position indica-tor.

8 Servicing

8.2 Servicing schedule

Series HVX vacuum circuit-breakersrequire regular inspections. The in-tervals depend on the strain to whichthe switches are subject during ope-ration, and on the operating conditi-ons.

In case of frequent condensation orair pollution (dust, smoke or corrosi-ve gases), the maintenance intervalsmust be adapted to the actual condi-tions.

IMPORTANT:The circuit-breaker opera-ting company is responsiblefor complying with the spe-

cified maintenance intervals and forperforming maintenance accordingto the actual operating and ambientconditions.

In case of queries or ambiguities,please contact the manufacturer.

Only specialist electricians certifiedby the manufacturer for maintenancework regarding series HVX vacuumcircuit-breakers and who have therequired knowledge regarding ope-ration of medium-voltage switchgearare permitted to perform maintenan-ce and cleaning work.

Warning!Observe the safety pro-visions of Chapter 1.5.

Warning!Risk of injury:The circuit-breakermust not be disassem-bled for maintenancework.

1. On principle, the 5 safety rulesapplicable for electrical enginee-ring must be complied with befo-re maintenance work on the cir-cuit-breaker is started:

• Isolate switchgear from powersupply

• Prevent it from reclosing

• Verify it for zero voltage

• Earth and short-circuit it

• Cover or bar off adjacent livecomponents.

2. Switch off the supply voltage forthe circuit-breaker drive and se-cure it against reclosing.

3. Release the energy-storing devi-ce by performing the correspon-ding operating sequence on thecircuit-breaker OFF – ON – OFF(see Chapter 7) and re-mountthe drive´s transport securing de-vice (see Chapter 6).

22

8.1 Safety

Servicing schedule

Maintenance intervals (ambient conditionsaccording to IEC 60 694)

Maintenance work Qualification/positionperforming the work

at least every 4 years

• Check for contamination/condensationand damage

• If necessary, clean circuit-breaker/with-drawable part (see section 8.3) andperform several switching tests Staff qualified accordingly

for the work to be done

after 20 years

• Clean, grease circuit-breaker/withdra-wable part (see Chapter 8.3 and 8.6)and perform several switching tests

• Check releases and blocking coils forproper working order

after 10,000 operating cycles of the circuitbreaker

Revision of the circuit breaker

Manufacturer's ServiceCenter

after 1,000 operating cycles of the withdrawa-ble part

Revision of the withdrawable part

once the max. admissible number of breakingoperations for the vacuum chambers has beenreached (see section 8.7)

Replace vacuum chambers

23

8.3 Cleaning insulatingcomponents

To ensure the specified insulating le-vel, the insulating components mustbe clean.

On principle, general cleanliness ofthe circuit-breaker or of its externalparts should be ensured.

Use a dry cleaning cloth for slightsoiling:

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

Use cleaning agents for severesoiling:

Cleaning agent, 1 l can (see Chapter9.2).

The use of other cleaning agents isnot admissible.

• Wear protective gloves

• Use cleaning agent according tomanufacturer's instructions

• Soak the cloth thoroughly andwipe the insulating components.Keep duration of exposure asshort as possible.

• Expose the cleaned surface tothe air for at least two hours.

When performing cleaning, makesure that the lubrication in the drivemechanisms is not removed. If thedrive mechanisms are no longer suf-ficiently lubricated, new lubricationmust be applied.

8.5 Avoid condensation

To ensure the specified insulating le-vel, the circuit-breaker - especially itsinsulating components - must not beexposed to condensation.

Measures to take in caseof condensation:

1. If condensation of the circuit-breaker is detected, the swit-ching device must be cleanedaccording to section 8.3.

2. Inspect or install heating. It mustprovide a sufficient heating per-formance to prevent condensati-on on the circuit-breaker.

8.4 Corrosion protection

Drive mechanisms and covers have along-term protection against corrosi-on. Any damage to the paint, scrat-ches and other damage must be re-paired immediately to avoid corrosi-on. Contact the manufacturer's Ser-vice Center.

24

Warning!Comply with safety pro-visions (Chapter 1.5).

Warning!Risk of injury:Circuit-breakers anddrives must not be dis-

assembled for service andmaintenance work.

Important:The following elementsmust not be lubricated:

- Motor - Electric releases- Push switches

- Blocking coils - Auxiliary switches - Ball bearings

Important:Only approved lubricantsmay be used (section 9.2).

Preparation

Remove the withdrawable part fromthe switchgear cubicle for inspection(see instructions for the panel con-cerned). Remove the cover plate ofthe circuit-breaker drive and re-mount the drive´s transport securingdevice.

8.6 Lubrication instructions

Fig. 8.1Circuit-breaker drive mechanism

High-pressure grease

Cryogenic grease

Lubrication points inside the circuit breaker´s drive

Silicon grease

Lubricant Symbol Lubrication points Lubrication procedure

Silicon greaseDrive: lever on plastic housing of spring chargingmechanism

Clean lubricating points using a lint-free cloth or a soft paint-brush, if ne-cessary using cleaning agent (usesparingly, just moisten points of lubri-cation).Apply a thin coat of lubricant (usinge.g. a paintbrush).

Cryogenic grease Drive: roller levers

High-pressuregrease

Drive: cam discs, cogwheels and other frictionpoints

Contact lubricantKontasynth Moving contacts, earth bar

1

2

Withdrawable part in PIX switchgear panels

• Spindle of withdrawable part me-chanism (Fig. 8.2, item 1). Thespindle is accessible from below

• Geared wheels of withdrawablepart mechanism (only in case ofmotor-drive (Fig. 8.2, item 2)).The geared wheels are accessi-ble once the lower front coverhas been removed.

25

KL

FL

Fig. 8.3Rack-in mechanism in PIX high current switchgear panels

Lubricant Points of lubrication Lubrication procedure

Lubricant KLAll accessible friction and slidingpoints in the rack-in mechanism

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

Liquid lubricantFL

Bearing, joints and guide mecha-nisms in the rack-in mechanism

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

Withdrawable part in PIX high current switchgear panels

To obtain access to the lubricationpoints, the withdrawable part mustbe in service position (see chapter7.5.2).

Fig. 8.2Rack-in mechanism in PIX switchgearpanels

� High-pressure grease 1 Spindle 2 Geared wheels

26

Fig. 8.4Moving contacts � Contact lubricant Kontasynth

Moving contacts

The lubrication procedure is descri-bed in the table on page 24.

Final steps

Remove transport securing device inthe drive. Re-mount the cover plateand insert the circuit-breaker in thepanel (see section 5). Check circuit-breaker according to section 6"Commissioning".

8.7 Maximum admissible number of breaking operations of the vacuum chambers

Ir [A]ISC [kA]

31,5 40 50

1250 – – �

2500 – – �

3150 � � �

n

30 000

10 000

1000

100

10

Ia

50

500

5000

I SC

Bemessungs-Betriebsstrom I 1250 A, 2500 A, 3150 A

Ausschaltstrom log

Aus

scha

ltzah

lI r

r

Ir = Rated (normal) current [A]

Isc = Short-circuit breaking current [kA]

The diagram defines exclusively themaximum admissible numbers ofbreaking operations of the circuit-breaker as a function of the ratednormal current Ir and of the short-cir-cuit breaking current Isc. It indicateswhen the vacuum interrupter cham-bers need to be replaced.

The possible combinations dependon the rated normal voltage:

For the data regarding the rated nor-mal current Ir and the short-circuitbreaking current Isc, please refer tothe nameplate (Fig. 8.5). 1

2

Fig. 8.5Data for rated normal current Ir (1) and short-circuit breaking current Isc (2) on the na-meplate

27

Num

ber

of b

reak

ing

oper

atio

ns n

Breaking current log Ia

Rated (normal) current Ir 1250 A, 2500 A, 3150 A

9 Annex

28

9.1 Accessories

1 2 3 4

Fig. 9.1Accessories for HVX circuit-breaker

Position Designation Order no.

1 ON/OFF operating rod AGS H35 446-01

2 Spring charging crank for spring operating mechanism AGS H30 498-01

3Moving crank handle with integrated slip coupling for withdrawable parts in PIXswitchgear panels

AGS H31 642-01 1)

AGS H32 532-01 2)

AGS H31 674-01 3)

4 Moving crank handle for withdrawable parts in PIX high current switchgear panels AGS C66 911-01

9.2 Auxiliary products

Only the following auxiliary productsmay be used, which are availablefrom the manufacturer. The use ofother auxiliary products is not admis-sible.

Warning!Danger of injury whenwrong handling the au-xiliary products. Comply

with the safety data sheets sup-plied by the manufacturers ofthe auxiliary products.

1) Withdrawable part, manually actuated, shape of insertion opening: hexagonal2) Withdrawable part, manually actuated, shape of insertion opening: square3) Emergency crank handle for withdrawable part, motor-actuated

Designation Symbol Order no.

Cleaning agent, 1 l can S 008152

Contact lubricant Kontasynth, 0.5 kg can S 008167

High-pressure grease ST 312-101-001

Cryogenic grease ST 312-105-001

Silicon grease ST 312-504-001

Lubricant KL, 0,5 kg can ST 312-111-835

Liquid lubricant FL, 0,5 kg can S 008153

29

The following elements must beused for all metal screw couplings:

• Screws and bolts: Grade ≥ 8.8

• Nuts: Grade 8.

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

Table 2: Screw coupling between switchingdevice and conductor bar with cop-per as conductor material

9.3 Screw fastenings

Threadsize

Tightening torque[Nm]

min. max.

M5 3,8 4,7

M6 7 9

M8 16 24

M10 36 44

M12 63 77

Threadsize

Tightening torque[Nm]

min. max.

M6 5,5 7,5

M8 15 19

M10 30 40

M12 60 76

Important:Caution when handlingbars insulated by heat-shrinkable sleeves: The

heat-shrinkable sleeve must not getinto contact with lubricant (swelling).

Important:Contact areas coated withlubricant Kontasynth shouldnot be touched, if possible.

Material of contact surfaces Pre-treatment

Silver-plated contact surfaces Clean 1)

Copper or copper alloy Clean 1), expose metallic surface 2)

Aluminium Clean 1), expose metallic surface 2)

Zinc-plated steel Remove passivation, not, however, the zinc layer 3)

Hot-galvanized sheet-metal Clean 1), passivation need not be removed

9.4 How to treat the contact surfaces

1. Contact surfaces must be subjected to preliminary treatment before screw-fastening:

1) Clean by means of lint-free cloth; use cleaning agent in case of serious contamination (see above)2) Expose metallic surface

– by treating the entire surface with emery cloth or a rotating grinding tool (grain size 100 or 80) or– using a wire brush which is clearly marked for use exclusively for aluminium or exclusively for copper

3) using a brass brush, steel brush

2. Immediately after the pre-treat-ment, coat the contact surfaceswith lubricant Kontasynth sothat the space between thecontact surfaces is completelyfilled once the screws havebeen fastened.

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