manual breaker areva mt

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

InstallationOperationMaintenance

No. AGS 531 301-01Issue 06/06

AREVA T&D

Technical instruction

MEDIUM VOLTAGE SWITCHGEARMEDIUM VOLTAGE SWITCHING DEVICE

HVX

HVX

HVX

HVX

HVX

0

IMPORTANT NOTE

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

On the other hand, this electronic version of the Technical Instruction 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 shall not be held liable for any such damage.

Service

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

Service Center93055 RegensburgGermany +49 (0)9 41/46 20-777 +49 (0)9 41/46 20-778

AARREEVVAA SSaacchhsseennwweerrkk GGmmbbHH 2006

AREVA Sachsenwerk GmbH

AREVA Sachsenwerk GmbH

No.24, Huo ju Bei Lu361006 XiamenChina +86 (0)592 5775316-0 +86 (0)592 5775139

AREVA T&D Xiamen Switchgear CO., Ltd.

Block-BN, Sector-V, Saltlake700091 KolkataIndia + 91 (0)33 23673071 + 91 (0)33 23677958

AREVA T&D

Av. Interlagos 421104661-300 So PauloBrasil +55 (0)11 3491 7058 +55 (0)11 3491 7158

AREVA T&D LTDA

Rathenaustrae 293055 RegensburgGermany +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 Transport protection and transport securing devices 115.3 HVX-F Mechanical assembly 125.4 HVX-E Mechanical assembly 145.5 Connecting the control lines 15

6 Commissioning 166.1 HVX-E (withdrawable unit) 166.2 HVX-F (mounted unit) 16

7 Operation 177.1 Control elements and operator interface 177.2 Interlocks 187.3 Actuate withdrawable unit (only HVX-E) 197.4 Charging the energy storing device 197.5 Switching operations 19

8 Servicing 208.1 Servicing schedule 208.2 Safety provisions 208.3 Cleaning insulating components 218.4 Corrosion protection 218.5 Avoid condensation 218.6 Lubrication instructions 228.7 Admissible numbers of breaking operations

of vacuum chamber 24

9 Annex 259.1 Accessories 259.2 Auxiliary products 259.3 Screw fastenings 269.4 Treatment of firmly screw-connected

contact surfaces 26

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:

WARNINGThis symbol warns of dan-gerous electrical voltage.Contact with voltage mayresult in fatal injury!

WARNINGThis symbol is used for in-structions non-compliancewith which may result in se-rious injury, death or serio-us material damage.

IMPORTANTThis symbol is used for in-formation which is importantto avoid damage.

1.1 Remarks on this Technical Instruction

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

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 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.

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. RV

The vacuum interrupter chambershave been approved by the X-RayOrdinance (RV) 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 (RV).

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 the EN 50110-1standard.

Applicable standards and regulati-ons:

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

Installation: IEC 61936-1 / HD637 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. 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 auxiliary

voltage and prevent it from re-closing.

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.

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.

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

1000m 1)

1) higher values on request

2.1 Type designation

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

The following data on the rating pla-te are relevant for replacement or incase of any queries:

Type designation (1)

Serial number (2)

Year of construction (3)

6

EExxaammppllee 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: Mounted unit E: Withdrawable unit

Technical data2

1

2

3

4

Fig. 2.1

Rating plate 1 Type designation 2 Serial number 3 Year of construction 4 Technical data

Rated voltage Ur [kV] 12 17,5 24

Rated power frequency 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

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

Rated frequency fr [Hz] 50/60

2.2 Technical data

72.3 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.

Component fitting options:

Motor

for charging the energy-storingdevice (spiral spring)

HVX-E: electric actuation of thewithdrawable unit

Opening release

3 ea. max.

Secondary release (Transformer-operated release)

1 ea. max.

(Maximum equipment - openingrelease and secondary release, 3units in total)

Undervoltage release

1 ea.

Closing 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 auxiliary voltage hasfallen or is shut off, all blockingcoils are in "blocked" position.

Rated auxiliary 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

Push switches

are snap-action switches on thedrive and are installed dependingon the customized design.

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").

Operating counter

The operating counter indicatesthe number of switching operati-ons.

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 auxiliary 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 rating plate (50/60 Hz)

8Variants3

1

2

6

5

4

3

11

1

7

1

2

8

6

5

7

3

9

10

4

Fig. 3.1

Vacuum circuit-breaker HVX-F - mounted unit with secondary terminal, 64-pole

Fig. 3.2

Vacuum 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 Rating plate 5 Operator interface 6 Secondary terminal 64-pole 7 Drive housing 11 Securing points

(corresp. to earthing points)


2 Circuit-breaker pole 3 Front handles (optional) 4 Rating plate 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

1122 kkVV

91

2

3

4

5

6

7

10

9

8

1a

1b

26

7

11

1213

14

15

Fig. 3.3

Vacuum circuit-breaker HVX-F - mounted unit with secondary terminal, 64-pole

Fig. 3.4

Vacuum circuit-breaker HVX-E - withdrawable unit with secondary terminal, 64-pole


2 Circuit-breaker pole3 Front handles (optional) 4 Rating plate 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

UUrr 1122 kkVVIIrr 11225500 AAIIsscc 2255 kkAA

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) 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. 4.2

Transport

Type Rated Current [kA]

< 1600 2000 / 2500

HVX-F - mounted unit 135 160

HVX-E - withdrawable Unit

(Guide values without packaging)

Fig. 4.1

Shipping unit

5.1 Instructions for assembly

Dimension drawings are madeavailable on request.

Check technical data on ratingplate.

Check auxiliary voltage of thecontrol and operating devices in-stalled.

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

WARNING:The energy storing de-vice must not be char-ged until assembly is fi-nished. Risk of injuries.

WARNING:The safety provisions ofchapter 1.5 must be ob-served.

5.2 Transport protectionand transport securing devices

The circuit-breaker is equipped witha transport securing device (Fig.5.2). The mounted unit model is pro-tected additionally against tippingover via a transport support on thecentral switch pole (Fig. 5.1).

HVX-F:

Remove transport support (U sectionrail on the central switch pole) onassembly (Fig. 5.1, 1).

Transport securing device in the drive mechanism:

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).

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

11

Assembly5

Fig. 5.2

HVX drive: Remove the transport securing device

1

Fig. 5.1

HVX-F (switch pole) 1 Transport support

5.3 HVX-F Mechanicalassembly

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

a) Fastening the circuit-breaker

WARNING:The frame being usedmust be suitable tobear the weight of thecircuit-breaker (seeChapter 4).

Fasten the circuit-breaker to theframe below the drive housing using4 screws M 10 (Fig. 5.3).

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

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

Earth terminal

IMPORTANT:Coat contact surfaces (referto Annex).


The screw coupling can be used forearthing the circuit-breaker. Moreo-ver, there are two bore-holes 12.5mm on both sides of the frame toenable connection to the earth, if ap-plicable (Fig. 5.3).

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

140

147

B

12,5( )

25

Fig. 5.3

Screw-fasten circuit-breaker

HVX circuit-breaker designed acc. to Fig. 3.1 Dimensions in mm

Pole center spacing 165 185 210 275

B 484 484 534 664

HVX circuit-breaker designed acc. to Fig. 3.3 Dimensions in mm

Pole center spacing 150 210

B 408 534


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-

b) Connecting conductor bars

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

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

IMPORTANT:Coat contact surfaces (referto Annex).

13

Connection areas on the circuit-breaker

Connection areas on the conductor bar

630 ACopper, metallically bright

Copper or aluminium

1250 A1600 ACopper, silver-plated

Copper or copper, silver-platedIn case of aluminium:use an intermediate layer of copper (thickness 0.1 mm) corresponding to thefull size of the connection area (reduction of rated normal current by 13%)

2000 A und 2500 ACopper, metallically bright

Copper, copper silver-plated, aluminium

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 A

1600 A

25

Fig. 5.4

High-voltage connector for the mounted unit (HVX model according to Fig. 3.1)

240

M12

Einschraubtiefe20 2 mm

26

50

2650

Fig. 5.5

High-voltage connector for the mountedunit (HVX model according to Fig. 3.3)

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

5.4 HVX-E Mechanicalassembly

Mounting the transport truck (optional)

A transport truck (optional) is usedto rack the circuit-breaker into theswitchgear panel (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 switchgear

IMPORTANT:When performing the follo-wing assembly steps, ob-serve and comply with theinstructions given for thepanel used.

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

2. Lock the circuit-breaker on thetransport truck.

3. Couple the transport truck to thepanel.

4. Unlock the circuit-breaker fromthe transport truck.

5. Push the circuit-breaker into thepanel until it is engaged in the in-terlock rocker.

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. 5.7).

14

Fig. 5.6

Move the circuit-breaker in front of the panel

Fig. 5.7

Equipotential bonding within the cell

Optionally, the HVX-E circuit-breakeris available with short-circuit proofearthing.

1

Fig. 5.8

1 Earth bar

5.5 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. 5.9

Control connector, 64-pin 1 Insert control connector 2 Lock

Fig. 5.11

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

1

Fig. 5.12

1 Control connector on terminal strip(only for HVX model according toFig. 3.1)

1

Fig. 5.10

1 Control connector, 64-pin (only forHVX 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 on the cell end 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. 5.12). Thespecific circuit diagram valid forthe unit in question 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).

Check whether the transport se-curing devices have been remo-ved (see Chapter 5.2).

IMPORTANT:Observe the operating andlocking conditions (Chapter7).

IMPORTANT:The energy storing deviceof motorized circuit-brea-kers is charged automatical-ly once the auxiliary voltageis applied.

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

16

Commissioning6

5. Racking 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 (mounted unit)

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 auxiliary voltage.

Actuate the releases to perform swit-ching operations and check functi-ons / interlocks.

Watch position indicators.

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

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 interlocksbetween the HVX-E and thecell. Check position indication.

- The codes (optional) of cir-cuit-breaker and cell mustcorrespond to each other (Fig.6.1).

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

Apply auxiliary voltage.

Actuate the releases to perform swit-ching operations and check functi-ons / interlocks. Watch position indi-cators.

Fig. 6.1

1 Circuit-breaker coding2 Spindle of withdrawable unit3 Spindle nut of withdrawable unit

(must be latched in the cell)

2

31

7.1 Control elements and operator interface

17

Operation7

1

2

3

4

Fig. 7.2

Control elements for the circuit-breakerHVX-F/HVX-E

00315

HVX

0 l

OFF button (rocker "0") or pushbutton "0"

ON button (rocker "I") or pushbutton "I"

Rating plate

Operations counter

Position indicator of circuit-breaker

Insertion opening for charging the closing spring

Position indicator of closing spring

Fig. 7.1

Operator interface of HVX circuit-breaker

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

Mechanical interlocks

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

18

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

Position indicators on circuit-breaker and possible operating sequences

C = Switching ON O = Switching OFF

Interlock Function of interlock Method of operation of interlock

Between the withdrawable unit and thelow-voltage connector

The withdrawable unit cannot be rackedin unless the low-voltage connector isinserted and locked

The opening for the moving crankhandle is locked

The low-voltage connector can only beinserted or removed while the withdra-wable unit is in its disconnected positi-on

The interlock for the low-voltageconnector in the drive mechanismhas been activated

Between the withdrawable unit andearthing switch

The withdrawable unit cannot be rackedin while the earthing switch of theswitchgear panel is in "ON" position

The moving crank handle is uncou-pled automatically

The earthing switch cannot be switchedon as soon as the withdrawable unit hasleft its disconnected position

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

Between the withdrawable unit and theoperating state of the circuit-breaker

The withdrawable unit cannot be rackedin or out while the circuit-breaker isswitched on

The opening for the moving crankhandle is locked

The circuit-breaker cannot be switchedon unless - the withdrawable unit is completely

in its disconnected or service positi-on and

- the crank handle for the rack-in me-chanism has been removed

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

Electrical interlocks

have been designed according tothe circuit diagram.

Item Position indicator

Energy-storing device (closing spring)

Position indicator

ON / OFF Switch position

possible operating sequence (mechanical)

1 released OFF none

2 charged OFF C - O

3 released ON O

4 charged ON O - C - O

7.2 Interlocks

7.3 Actuate withdrawa-ble unit (only HVX-E)

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

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. 7.3) 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 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. 7.3) 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 switchgear panel.

2. Remove crank handle.

Via motor-drive

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

7.4 Charging the energystoring device

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":

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,Chapter 7.1, item 2).

Via motor

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

19

7.5 Switching operations

Closing (ON)

Push button "ON" - or

actuate closing release electrical-ly.

The position indicator shows theswitch position "ON" (Table,Chapter 7.1, item 3).

The position of the auxiliaryswitch has 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, Chapter 7.1,item 4).

Opening (OFF)

Push button "OFF" - or

switch off via opening release,undervoltage release or seconda-ry coil.

The position indicator shows theswitch position "OFF" (Table,Chapter 7.1, item 1 or 2).

The position of the auxiliaryswitch has changed.

Fig. 7.4

Charge the energy storing device

l

0Fig. 7.3Crank handle to rack the circuit-breakerin and out

8.1 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.

8.2 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:The safety provisions ofChapter 1.5 must be ob-served.

WARNING:The circuit-breakermust not be disassem-bled for maintenance

work (see Disclaimer of liability,section 1.3).

20

Servicing8

Servicing schedule

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

Maintenance work Qualification / position perfor-ming the work

Every 4 years

Check for contamination / conden-sation and damage

If necessary, clean circuit-breaker(see section 8.3) and perform seve-ral switching tests Staff qualified accordingly for the

work to be done

After 20 years

Clean, grease circuit-breaker (seeChapter 8.3 and 8.6) and performseveral switching tests

Check releases and blocking coilsfor proper working order

Once the summation current limit hasbeen reached (refer to Chapter 8.7)

Replace circuit-breaker pole Manufacturer's Service Center

Safety provisions

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.

These rules apply for the upperand lower circuit-breaker termi-nals alike.

2. Switch off the auxiliary 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. ON - OFF - ON(see Chapter 7)

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.

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. Installation or inspection of theappropriate heating. It must provi-de a sufficient heating perfor-mance to prevent condensationon the circuit-breaker.

21

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.

Preparations

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

WARNING:Circuit-breakers anddrives must not be dis-assembled for service

and maintenance work (see Disclaimer of liability, section1.3).

Remove the withdrawable unit fromthe switchgear cubicle for inspection(see instructions for the panel con-cerned). Remove the cover plate ofthe circuit-breaker drive.

22

Fig. 8.1

Circuit-breaker drive mechanism High-pressure grease c Cryogenic grease

Lubricants

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

c Cryogenic grease High-pressure greaseU Contact lubricant Kontasynth Lubrication procedure

1. Clean the points of lubrication(Fig. 8.1 to 8.3) using a lint-freecotton cloth; in case of seriouscontamination, use a cleaningagent (see section 8.3).

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

Points of lubrication

IMPORTANT:The following elementsmust not be lubricated:

- Motor - Electric releases- Push switches

- Blocking coils - Auxiliary switches - Ball bearings

Points of lubrication on the drive(Fig. 8.1):

All metallic surfaces sliding uponeach other, especially cam discs,cogwheels and ratchet levers.

8.6 Lubrication instructions

23

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

1600 A / 2000 A 2500 A

Fig. 8.3

Moving contacts

U Contact lubricant Kontasynth

Moving contacts (Fig. 8.3).

Final steps

Re-mount the cover plate and insertthe circuit-breaker in the panel (seesection 5). Check circuit-breaker ac-cording to section 6 "Commissio-ning".

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

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

1

2

Fig. 8.2

Rack-in mechanism

F High-pressure grease 1 Spindle 2 Geared wheels

24

The diagram defines exclusively theadmissible summation current limit. Itis a guide as to whether the vacuuminterrupter chambers/pole sectionsneed to be replaced or not.

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. 8.4

Data for rated normal current Ir (1) and short-circuit breaking current Isc (2) on the ra-ting plate

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

8.7 Admissible numbers of breaking operations of vacuum chamber

Num

ber

of b

reak

ing

oper

atio

ns n

Breaking current log Ia

9.1 Accessories

9.2 Auxiliary products

Only the following auxiliary productsmay be used, which are availablefrom AREVA Sachsenwerk GmbH.The use of other auxiliary products isnot admissible.

25

Annex 9

Designation Order no.

Contact lubricant Kontasynth, 0.5 kg can S 008167

High-pressure grease, 0.3 l can ST 312-101-833

Cryogenic grease, 0.3 l can ST 312-105-833

Cleaning agent, 1 l can S 008152

12 3

Fig. 9.1

Accessories for HVX circuit-breaker The accessories depend on the panel type used, and must be enquired about if neces-sary.

1 ON/OFF operating rod 2 Spring charging crank for spring operating mechanism 3 Moving crank handle with integrated slip coupling (in case of HVX-E only)

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 surfa-ce:

The following elements must beused for all metal screw couplings:

Screws and bolts: Grade 8.8

Nuts: Grade 8.

Threadsize

Tightening torque[Nm]

min. max.

M6 7 9

M8 16 24

M10 36 44

M12 63 77

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

Threadsize

Tightening torque[Nm]

min. max.

M6 5,5 7,5

M8 15 19

M10 30 40

M12 60 76

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

9.3 Screw fastenings

9.4 Treatment of firmly screw-connected contact surfaces

(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.

26

Material of contactsurfaces

Pre-treat-ment

Copper, silver-plated -

Copper A

Aluminium, silver-plated

-

Aluminium B

Steel or steel, galvanized

C

AREVA Sachsenwerk GmbH Rathenaustrae 2 D-93055 Regensburg Postfach 10 01 55 D-93001 RegensburgTelefon +49 (0)9 41/46 20-0 Telefax +49 (0)9 41/46 20-4 18

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T&D Worldwide Contact Centre

[email protected]

www.areva-td.com

AGS 531 301-01Content1 Regulations and Provisions2 Technical data3 Variants4 Delivery, storage and transport5 Assembly6 Commissioning7 Operation8 Servicing9 Annex

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