HVXVacuum circuit-breaker 12 - 24 kV (≤ 2500 A, ≤ 40 kA)

AREVA T&D

Technical instruction

MEDIUM VOLTAGE SWITCHING DEVICE

HVX

HVX

HVX

HVX

HVX

0

InstallationOperationMaintenance

No. AGS 531 301-01

Edition 07/07

© 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.

Service:

Should you have any queries as toour service, 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

T&D Worldwide Contact Centrecontact.centre@areva-td.comwww.areva-td.com

AREVA T&D

Rathenaustraße 293055 RegensburgDeutschland� +49 (0)9 41/46 20-0� +49 (0)9 41/46 20-418

Manufacturer:

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

3 Variants 8

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

5 Assembly 115.1 Instructions for assembly 115.2 HVX-F Mechanical assembly 115.3 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 Actuate withdrawable part (only HVX-E) 197.4 Charging the energy storing device 207.5 Switching operations 20

8 Servicing 218.1 Safety 218.2 Servicing schedule 218.3 Cleaning insulating components 228.4 Corrosion protection 228.5 Avoid condensation 228.6 Lubrication instructions 238.7 Maximum admissible number of breaking

operations of the vacuum chambers 25

9 Annex 269.1 Accessories 269.2 Auxiliary products 269.3 Screw fastenings 279.4 How to treat the contact surfaces 27

3

Content

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 panel with thiscircuit-breaker.

When re-selling the circuit-breakeror the panel with circuit-breaker,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.

4

Regulations and Provisions1

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 andearth the system according tothe applicable safety rules pur-suant 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).

5

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.

-5/40 oC 1)

Average value over 24hours (max.)

35 oC 1)

Max. installation altitu-de above sea level

1000 m 1)

1) higher values on request

2.1 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)

6

Example HVX 12 - 31 - 08 - E

Series HVX

Rated voltage 12 kV

Rated short-circuit breaking current 31,5 kA

Rated normal current 800 A

F: fixed type E: withdrawable unit

Technical data2

1

2

3

4

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

Rated voltage Ur [kV] 12 17,5 24

Rated lightning impulse withstand voltage Up [kV] 75 95 125

Rated power frequency withstand voltage Ud [kV] 28 38 50

Rated operating current Ir max. [A] 2500

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

Rated short-circuit breaking current Isc max. [kA] 40 31,5

Rated short-time current Ik ( 3 s) max. [kA] 40 31,5

Rated frequency fr [Hz] 50/60

2.2 Technical data

7

2.3 Control and operating devices

The circuit breaker been designedon principle so as to permit manualoperation.

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 unit

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

• 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 withdrawableunit. If the rated supply voltage hasfallen or is shut off, all blockingcoils are in "blocked" position.

Rated supply voltageDC [V] AC [V]

[V] ≤ 48 125 220 120 230

Switching capacity [A] 10 3,8 2 10

Time factor T=L/R [ms] 10 20 –

Rated short-time current 250 A / 3 s

Rated continuous current [A] 15 –

Technical data, auxiliary switch

Auxiliary switches

Auxiliary switches are always actua-ted directly by the switch shaft via anintermediate linkage. Their positionalways corresponds to that of themain contacts. As standard, the cir-cuit-breaker is equipped with twoauxiliary switches with 8 contact ele-ments each.

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

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]

DC [W] AC 50/60 Hz [VA]

Closing release ≤ 250

Opening release ≤ 250

Undervoltage release approx. 12

Motor for energy-storage device approx. 100

Motor for withdrawable unit approx. 120

Secondary release – approx. 12

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

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] ≤ 12

Operating times *

* Rated frequency according to specification on nameplate (50/60 Hz)

Overview of rated supply voltages

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

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

8

Variants3

1

2

6

5

4

3

11

1

7

1

2

8

6

5

7

3

9

10

4

Fig. 3.1Vacuum circuit-breaker HVX-F – fixed type with secondary terminal, 64-pole

Fig. 3.2Vacuum circuit-breaker HVX-E – withdrawable unit with secondary terminal, 64-pole

1 Conductor bar terminal / moving contact

2 Circuit-breaker pole 3 Front handles (optional) 4 Nameplate 5 Operator interface 6 Secondary terminal 64-pole 7 Drive housing 11 Securing points

(corresp. to earthing points)

1 Conductor bar terminal / moving contact

2 Circuit-breaker pole 3 Front handles (optional) 4 Nameplate 5 Operator interface 6 Secondary terminal 64-pole 7 Drive housing 8 Rollers9 Withdrawable unit10 Insertion opening for crank to move

the circuit-breaker into its disconnec-ted/service position / manually/mo-tor-driven

12 kV < Ur ≤ 24 kV1250 A < Ir ≤ 2500 A25 kA < Isc ≤ 40 kA

HVX model for the following tech-nical data (Fig. 3.1 and 3.2):

9

1

2

3

4

5

6

7

10

9

8

1a

1b

26

7

11

1213

14

15

Fig. 3.3Vacuum circuit-breaker HVX-F – fixed type with secondary terminal, 64-pole

Fig. 3.4Vacuum circuit-breaker HVX-E – withdrawable unit with secondary terminal, 64-pole

1 Conductor bar terminal / moving contact

2 Circuit-breaker pole3 Front handles (optional) 4 Nameplate 5 Operator interface 6 Secondary terminal 64-pole 7 Drive housing 8 Rollers9 Withdrawable unit 10 Insertion opening for crank to move

the circuit-breaker into its disconnec-ted/service position / manually/motor-driven

1a Top conductor bar terminal 1b Bottom conductor bar terminal 2 Circuit-breaker pole 6 Secondary terminal

(control connector) 7 Drive housing 11 Securing points 12 Rocker (operating lever) 13 Press rod 14 Flexible conductor 15 Vacuum interrupter chamber

Ur ≤ 12 kVIr ≤ 1250 AIsc ≤ 25 kA

HVX model for the following tech-nical data (Fig. 3.3 and 3.4):

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 discrepancies.

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

Transport using a forklift truck:

Only transport the circuit-breakerwithin its shipping unit on a pallet.

Transport without pallet:

Lift circuit-breaker acc. to Fig. 4.2. A rope (not a metallic steel cable) Ø 12 to 15 mm or a strap is requi-red to this effect.

Warning:Make sure the rope orstrap is strong enoughto bear the weight ofthe circuit-breaker.

Weights [kg]

10

Delivery, storage and transport 4

>50°

Fig. 4.2Transport

Type Rated Current [kA]

< 1600 2000/2500

HVX-F – fixed type 135 160

HVX-E – withdrawable Unit

(Guide values without packaging)

Fig. 4.1Shipping unit

5.1 Instructions for assembly

• Dimension drawings are madeavailable on request.

• Check technical data on name-plate.

• Check supply voltage of the con-trol and operating devices instal-led.

The circuit-breaker is supplied in po-sition "OFF" and with the energy sto-ring device "released".

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

ged until assembly is finished.

11

Assembly5

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

5.2 HVX-F Mechanical assembly

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

5.2.1 Fastening the circuit-breaker

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

circuit-breaker (see Chapter 4).

Fasten the circuit-breaker to theframe below the drive housing using4 screws M 10 (Fig. 5.1).

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

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

140

147

B

25

Fig. 5.1Drillings for screw-fastening

HVX circuit-breaker designed acc. to ...

... Fig. 3.1 ... Fig. 3.3

Pole center spacing [mm] 165 185 210 275 150 210

B [mm] 484 484 534 664 408 534

5.2.2 Earth terminal

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

The screw coupling can be used forearthing the circuit-breaker. Moreo-ver, there are two bore-holes ø 12.5mm on both sides of the frame toenable connection to the earth, if ap-plicable (Fig. 5.2).

• 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.

12

Fig. 5.2Drillings for earth terminal

ø 12,5( )

1

Fig. 5.3HVX-F (switch pole) 1 Transport support

The circuit breaker is protectedagainst tipping over via a transportsupport (U section rail) on the cen-tral switch pole (Fig. 5.3).

Remove transport support on as-sembly.

5.2.3 Remove transport support

• 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 circuit-breaker. If the next supportingpoint is not located in the directi-on of the switch pole axis, make

5.2.4 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).

13

∅ 9

15

25

25

25

40

458

∅ 9

15

25

25

458

60

630/1250 A

40

80

25

344

10,5

9,5

2000 A2500 A

1600 A

25

M12

Fig. 5.4High-voltage connector for the fixed type (HVX model according to Fig. 3.1)

240

M12

Einschraubtiefe20 ± 2 mm

26

50

2650

Fig. 5.5High-voltage connector for the fixed type(HVX model according to Fig. 3.3)

sure that the circuit-breaker poleis not exposed to higher electro-dynamic forces.

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

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

Thread reach20 ± 2 mm

Rated voltage IrConnection areas

on the circuit-breaker on the conductor bar

630 A Metallically bright copper Copper or aluminium

1250 A1600 A2000 A2500 A

Silver-plated copper

Copper or silver-plated copperIn case of aluminium:use an intermediate layer of copper (thickness 0.1 mm) correspon-ding to the full size of the connection area (reduction of rated nor-mal current by 13 %)

5.3 HVX-E Mechanicalassembly

A transport truck (optional) is usedto rack the circuit-breaker into thepanel (Fig. 5.6).

For the design and method of opera-tion of the transport truck used,please refer to the instructions forthe panel in question.

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

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 may becoded to match (Fig. 5.7).

This is to prevent a withdrawableunit from being racked completelyinto the panel if the rated data donot match.

1. Check the ratings indicated onthe nameplate between theHVX-E and the panel.

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

3. Lock the circuit-breaker on thetransport truck.

4. Couple the transport truck to thepanel.

5. Unlock the circuit-breaker fromthe transport trolley and rack thecircuit-breaker into the panel. Thecircuit breaker must latch into thelock rocker of the panels (Fig.5.7).

6. Release the transport truck fromthe panel.

Earth terminal

The switching device potential is lin-ked to the panel via the two frontwheels of the withdrawable unit (Fig. 5.8).

14

Fig. 5.6Circuit-breaker on transport truck in front of the panel

Fig. 5.8Equipotential bonding within the cell

Optionally, the HVX-E circuit-breakeris available with short-circuit proofearthing (Fig. 5.7, pos. 4).

2

31

4

Fig. 5.71 Circuit-breaker coding2 Spindle of withdrawable unit3 Spindle nut of withdrawable unit

(must be latched in the cell)4 Earth bar

5.4 Connecting the control lines

The control lines are connected, de-pending on design, via control con-nectors (Fig. 5.9, 5.10 and 5.11) orcontrol lines to the terminal strips inthe drive casing (Fig. 5.12). 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

15

1

2

Fig. 5.9Control connector, 64-pin 1 Insert control connector 2 Lock

Fig. 5.11Insert control connector, 36-pin (only forHVX model according to Fig. 3.2)

1

Fig. 5.121 Control connector on terminal strip

(only for HVX model according toFig. 3.1)

1

Fig. 5.101 Control connector, 64-pin (only for

HVX model according to Fig. 3.3)

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 to 5.11).

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

be inserted or removed while thecircuit-breaker is in disconnectedposition.

Connection to terminal strip

1. Remove the cover plate.

2. Connect external control lines viathe terminal strip (Fig. 5.12). 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 for screw-fastening (refer to Annex).

• 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 (Chapter7).

Important:The energy storing deviceof motorized circuit-brea-kers is charged automatical-ly once the supply voltage isapplied.

Important:Undervoltage releases / blo-cking coils (optional) enableswitching tests only to beperformed with the supplyvoltage applied.

16

Commissioning6

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:

1

2

3 4

Fig. 6.1Remove transport securing device in the drive1 Transport securing device2 Front cover3 Warning label with instructions for commissioning4 Label with informations about the removal of the transport securing device

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%.

17

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 unit 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' screwcouplings using a torque wrench.

– Check the screw coupling of theearth 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.

7.1 Control elements and operator interface

18

Operation7

1

2

3

4

Fig. 7.2Control elements for the circuit-breakerHVX-F/HVX-E

00315

HVX

0 l

button (rocker "0") or pushbutton "0" to switch circuit breaker OFF (open)

button (rocker "I") or pushbutton "I" to switch circuit breaker ON (close)

Nameplate

Operations counter

Position indicator of circuit-breaker

Insertion opening for charging the energy storing device

Position indicator of closing spring

Fig. 7.1Operator interface of HVX circuit-breaker

1 closed door of the panel 2 ON/OFF operating rod 3 Spring charging crank for spring operating mechanism 4 Moving crank handle (only in case of HVX-E)

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

19

Mechanical interlocks

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

Electrical interlocks

have been designed according tothe circuit diagram.

7.2 Interlocks

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 andlocked

The opening for the moving crankhandle is locked

The low-voltage connector can only be insertedor removed while the withdrawable part is in itsdisconnected 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 ser-vice position in while the earthing switch of thepanel 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 disconnectedposition

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

Between the circuit-breakerand the withdrawable part

Circuit-breaker cannot be moved to service/dis-connected 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/ disconnec-

ted position and – the actuating crank for the withdrawable part

mechanism has been removed

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

7.3 Actuate withdrawable part (HVX-E only)

Move circuit-breaker from discon-nected into service position byhand:

Initial situation: Circuit-breaker OFF Earthing switch OFF

1. Insert crank handle with integra-ted slip coupling (Fig. 7.3) 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 panel.

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. 7.3) 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 panel.

2. Remove crank handle.

Fig. 7.3Crank handle to rack the circuit-breakerin and out

Via motor-drive

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

Opening (OFF)

• Push button "OFF" (O) or

• actuate opening release or

• by undervoltage release or se-condary coil.

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

The position of the auxiliary switchhas changed.

Closing (ON)

• Push button "ON" (I) or

• actuate closing release electrical-ly.

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

The position of the auxiliary switchhas changed.

Manually

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

1. Insert crank into opening for ten-sioning the energy storing device(Fig. 7.4)

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. 7.4).

20

Fig. 7.4Charge the energy storing device

l 0

7.4 Charging the energy storing device

If the motor starts during this pro-cess, this does not constitute arisk.

3. Remove crank. The circuit-brea-ker is ready for closing (table be-low, item 2).

Via motor

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

7.5 Switching operations

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 "char-ged" (table below, item 4).

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

8.1 Safety provisions

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 maintenance work.

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 circuit breaker frompower supply

• 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).

21

Servicing8

Servicing schedule

Maintenance intervals (ambient con-ditions according to IEC 60 694)

Maintenance work Qualification/positionperforming the work

at least every 4 years

• Check for contamination/condensation and da-mage

• If necessary, clean circuit-breaker (see section8.3) and perform several switching tests Staff qualified accordin-

gly for the work to bedone

after 20 years

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

• Check releases and blocking coils for properworking order

after 10,000 operating cycles of thecircuit breaker

Revision of the circuit-breaker

Manufacturer's ServiceCenter

after 1,000 operating cycles of thewithdrawable part

Revision of the withdrawable part

once the max. admissible number ofbreaking operations for the vacuumchambers has been reached (seesection 8.7)

Replace vacuum chambers

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.

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.

22

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.

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.

23

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 unit fromthe panel for inspection (see instruc-tions for the panel concerned). Re-move the cover plate of the circuit-breaker drive and re-mount thedrive´s transport securing device.

8.6 Lubrication instructions

Fig. 8.1Circuit-breaker drive mechanism

High-pressure grease

Cryogenic grease

Lubrication points

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

24

630 A (< 20 kA) 1250 A / 630 A (> 25 kA)

1600 A / 2000 A 2500 A

Fig. 8.3Moving contacts � Contact lubricant Kontasynth

• Moving contacts (Fig. 8.3).

Final steps

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

• Spindle of the rack-in mechanism(Fig. 8.2, item 1). The spindle isaccessible from below

• Geared wheels of the rack-in me-chanism (only in case of motor-drive; fig. 8.2, item 2). The gea-red wheels are accessible oncethe lower front cover has beenremoved.

1

2

Fig. 8.2Rack-in mechanism � High-pressure grease 1 Spindle 2 Geared wheels

25

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.

n

30 000

10 000

1000

100

10

Ia

50

500

5000

I SC

Ausschaltstrom logA

ussc

haltz

ahl

I r

Ir = Rated (normal) current [A]

Isc = Short-circuit breaking current [kA]

1

2

Fig. 8.4Data for rated normal current Ir (1) and short-circuit breaking current Isc (2) on the na-meplate

For the data regarding the rated nor-mal current Ir and the short-circuitbreaking current Isc, please refer tothe nameplate (Fig. 8.4).

8.7 Maximum admissible number of breaking operations of the vacuum chambers

Num

ber

of b

reak

ing

oper

atio

ns n

Breaking current log Ia

9.1 Accessories

26

Annex 9

12 3

Fig. 9.1Accessories for HVX circuit-breaker

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.

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

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

3 Moving crank handle with integrated slip coupling (HVX-E)

AGS H31 601-01 1)

AGS H32 532-01 2)

AGS H31 674-01 3)

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

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

27

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.

Notes:

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