instruction manual for vc(hca)

8/15/2019 Instruction Manual for VC(HCA)

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N o t i c e

Read and understand these instructions before attempting anyunpacking, assembly, operation or maintenance of the circuitbreaker.This instruction manual should be applied only to HCA Seriesvacuum contactors.This instruction manual does not include all items regardinginstallation and maintenance procedures.For more information, please contact HYUNDAI Heavy IndustriesCo., Ltd. or one of our partners.

HEAVY INDUSTRIES CO.,LTD.

V acuum Contactor

HCA Series

Instruction Manual


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Safety Practices

2


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Safety Practices During Operation

Safety Practices During Maintenance

>> 3

VC | HCA Series

Do not touch the primary circuit andthe control circuit.

Do not work on contactors unless theprimary circuits are disconnectedby the visible breaker.Replace the vacuum interrupter when

the wipe is below 0.5 mm.

Failure to maintenance the equipmentcould result in serious injury and productfailure and can prevent successfulfunctioning of connected apparatus.Do not work on contactors with powerbeing supplied to the control circuit.Do not leave maintenance tool aroundthe contactor.Do not work on closed contactors.Be sure that bolts are tightenedaccording to our standards afterreplacement and check the tightnessperiodically.It is important to replace the VacuumInterrupter for the faculty of thecontactor.so should consult us to guaranteeproper replacement.Note and check the relationship betweeneach wire and its associated auxiliaryswitch terminal.

Do not insert & drawout the contactorin the closed condition.

Do not leave contactors in anintermediate position.Always place the contactor in the testor connection position.Do not leave contactors of G cradle inunlock codition.


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HCA-Series Vacuum Contactors are suitable for switchingand controlling 3phase motors with squirrel cage of slipring rotor, capacitor and transformer which are dried andmolded type.

These are designed and manufactured for the high frequentswitching, especially taken account of safety and qualityassurances.

1.1 Specification

1.2 Operating Time & Current

1.3 Application Condition

1) Ambient temperature: -5 402) Relative humidity: below 85%3) Altitude: below 1000 m from sea-level

Please contact us for the special applications.

>> 5

VC | HCA SeriesGeneral01

Rated Voltage Rated Current Power frequency withstand voltageBIL Interrupting RatingCategory

Operating Cycle

Control Voltage Closing Current (A) Holding Current (A) Tripping Current (A) Closing Time (ms) Tripping Time (ms)

Do not install contactors in the hightemperature, high humid, dusty, corrosiveand vibrating condition.


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1.4 Ordering System

1.5 Application Considerations

1) Verify that the voltage and current is within thespecified ratings.

2) The vacuum interrupter should be replaced after1,000,000 operations. If the contactor is not protectedby fuses, the vacuum interrupter should be replaced

if they have interrupted fault currents at or near theirmaximum interrupting rating.

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1.6 Fuse Selection

Fuse selection table

>> 7

VC | HCA Series

This table is made by catalogues of fuse makers.

Please contact fuse makers for the further details of application

data.

SIBA’s motor selection applies to the 3-phase motor with starting

time 15 seconds and starting frequency 2 times per hour.

SIBA recommend to choose fuse from the next higher voltage

range in the condensor load.

3 Motor (kW)

3.3 kV 6.6 kV 3.3 kV 3.3 kV6.6 kV 6.6 kV

3 Transformer (kVA) 3 Condenser (kVAR)Load

Fuse maker

6.3

10

16

20

25

30(31.5)

40

50

63

80

100

125

160

200

250

315

355

2 125

2 160

2 200

2 250

SIBA

-

-

-

-

-

-

-

90

100

125

160

200

275

315

400

500

600

-

500

650

750

LG

-

-

-

37~75

-

-

-

90~200

-

-

220~400

-

450~630

710~800

-

-

-

-

-

-

-

EFEN

-

-

-

30

-

55

-

75

100

-

150

200

250

350

-

-

-

400

500

710

-

LG

-

-

-

75~160

-

-

-

185~400

-

-

450~800

-

900~1250

1500

-

-

-

-

-

-

-

EFEN

-

30

55

-

75

100

-

150

200

250

300

400

500

630

-

-

-

800

1000

1250

-

SIBA

-

-

-

50

-

80

100

125

160

200

250

315

400

500

630

750

900

-

800

1000

1250

LG

-

10

-

20

-

30

50

75

-

150

200

-

300

400

-

-

-

-

-

-

-

EFEN

-

-

30

-

55

75

100

-

150

200

250

-

400

500

-

-

-

630

800

1000

-

SIBA

-

-

-

100

-

160

200

250

315

400

500

630

800

1000

1250

1500

1800

-

1600

2000

2500

LG

5

15

-

50

-

75

100

150

-

200

400

-

500

750

-

-

-

-

-

-

-

EFEN

-

30

55

75

-

100

-

150

250

300

350

400

630

800

-

-

-

1000

1500

-

-

SIBA

-

-

-

30

-

50

75

100

125

150

200

250

300

375

500

600

700

-

600

750

1000

LG

-

10

-

30

-

50

75

100

-

150

300

-

400

600

-

-

-

-

-

-

-

EFEN

-

-

30

-

55

-

75

100

150

200

300

350

400

630

-

-

-

710

800

1000

-

SIBA

-

-

-

60

-

100

150

200

250

300

400

500

650

750

1000

1200

1400

-

1200

1500

2000

LG

-

25

-

50

-

100

150

200

-

400

600

-

800

1000

-

-

-

-

-

-

-

EFEN

30

55

75

100

-

150

200

250

350

400

500

710

800

1250

-

-

-

-

-

-

-

SIBA

-

-

-

-

-

-

-

160

200

250

330

400

550

650

830

1000

1200

-

1000

1300

1500

Fuse rated

current (A)


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>> 9

VC | HCA Series

2.4 Installation

1) Confirm the type and rating, make sure no damageand clean contactors with dry cloths, before installingcontactors into the switchgear.

2) Mount contactors on a level floor referring toguidelines for mounting dimensions in our catalogue“HCA Series Vacuum Contactor”.

3) Clean the connecting surface with dry cloths, and thenconnect main-circuit buses and earth terminals.Be careful not to shock enclosures and contactors.

2.5 Inspection Before Operation

1) Confirm whether contactors are installed properly.If not, install contactors each again according to clause 2.4.

2) Operate contactors a few times manually to ensure

that contactors closes and opens smoothly.Then, operate contactors electrically in the testposition, and confirm that the ON/OFF indicator worksproperly.

3) Confirm that no tools and materials are left near thecontactor.

Do not work on contactors unless theprimary circuit are disconnected by thevisible breaker.When connecting bus-bars, tighten bolts

by the our standard.Contactors are mounting on thehorizontal plane tightly.


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VC | HCA Series

2) OpeningFor continuously energized types, if the closing coil isde-energized by the OFF signal and the openingspring is released to the OPEN condition,

then the opening of contactor is completed.For latched type, if the trip coil is energized by OFFsignal or the trip button is pushed, the hook roller ofthe latch device is released and the moving coremoves to OPEN condition by the opening spring.

3.3 Structure of the Vacuum Interrupter

The Vacuum Interrupter has, the ContactStem , the Contacts , the Bellowsand the Ceramic Insulator .The contact is designed to guarantee 1million operations and to restrain thetransient recovery voltage under 1 Achopping current.The low pressure in the VacuumInterrupter is maintained for over30 years of service, so the VacuumInterrupter is maintenance-free.But if necessary, it is checked by theHYUNDAI VACUUM TESTER (HVT-1).


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VC | HCA Series

FuseFuses prevent the magnification of the short-circuit current.Fuse Melting IndicatorThe Fuse Melting Detector can show electrically

whether the Fuse was blown or not.Position SwitchThe Position Switch indicates electrically where thecontactor is in the TEST or CONNECTION position.

2) Interlock

1

2

If the contactor is closed,it cannot insert andwithdraw contactorin the TEST or

CONNECTION position

The contactor cannot beclosed during the processof inserting and withdrawing

Move the contactor to TESTor CONNECTION position,and then close the contactor.

The Interlock Pin,attached in frame inside,prevents the contactor from

inserting mechanically.

The Interlock Pin prevent theclosing mechanically.

The Auxiliary Switch cuts offthe control source(electrical interlock)

Open the contactor Standard

Standard

Option


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>> 15

VC | HCA Series

How to insert the contactor in the G cradle.The interlock, which is screw operation type,will be conducted automatically in each Test andService position separately.

Before inserting contactorMake sure that contactor is open.Set the Manual Lock Handle to the UNLOCK position.Inserting to the TEST positionPut a contactor into the switchgear and push it slowlyuntil it stops. This is the test position.

Set the Manual Lock Handle to the LOCK position.Please refer to Fig. 3-6.Inserting to the CONNECTION positionInsert the Rack Handle to the head of the Fixing Screw.Turn it clockwise direction.If the contactor is inserted fully, the Fixing Screwcannot be rotated and the Position Sticker indicates theCONNECTION POSITION.When you pull out the Rack-in Handle at this position,the Stopper is pushed out to prevent the unexpectedmoving of the Fixing Screw.

Do not touch the primary circuit andthe control circuit.

Rack-in Handle

Stoper

Inserting

Do not leave contactors in anintermediate position.Always place the contactor in the test orconnection position.Do not leave contactors of G cradle inunlock codition.

Manual Lock Handle

FRONT COVER


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>> 17

VC | HCA Series

Maintenance shall be carried out to preserve trouble-freeoperation and achieve the longest possible working life of contactors.HCA Series Vacuum Contactors are characterized by their

simple and robust construction and they have a long lifeexpectancy. Their operating mechanisms have a lowmaintenance requirement, and the interrupters aremaintenance-free during their working life.The maintenance is determined by environmentalinfluences, switching frequency, and so on.

4.1 Visual Inspection (every 1-6 months)

The purpose of a visual inspection has to be donewhenever you can.

1

2

3

Failure to maintain the equipment couldresult in serious injury and product failureand can prevent successful functioningof connected apparatus.

Do not work on contactors with powerbeing supplied to the control circuit.Do not leave maintenance tools aroundthe contactor.Do not work on closed contactors.Be sure that bolts are tightened by theour standard after replacement andcheck the tightness periodically.

Inspection and Maintenance04


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>> 19

VC | HCA Series

4.3 Checking Vacuum and the Contact Erosion Limit

1) Checking the vacuumThe low pressure in the Vacuum Interrupter ismaintained for over 30 years of service.That means the Vacuum Interrupter is maintenance-free.But if necessary, it is checked by the HYUNDAIVACUUM TESTER (HVT-1).

2) Checking the contact erosionSince the contacts are contained inside the interrupter,they remain clean and require no maintenance.However, during high current interrupting, there maybe a minimum amount of erosion from the contactsurfaces. To check the erosion of the interruptercontacts and carry out the following operations.

Close the contactor.Open the Rear cover.Measure the distance between the Dish Washerand the Pressing Plate.With new interrupters this distance is about1.0~2.0 mm.If it is reduced to 0.5mm, the three interruptersmust be replaced.Checking the contact erosion is important toevaluate the efficiency of the interrupters(Refer to the Fig. 4-1).

Replace the vacuum interrupterwhen the wipe is below 0.5 mm.

1.0~2.0 mm 0 mm

Dish Washer

Pressing Plate


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2) Replacing the closing coilThe contactor employs a pair of magnet coil for eachcontactor.

Remove the moving core (Fig. 3-1

Remove the rear coverCut off the leads of the closing coil after marking theleads and noting the relationship between each lead.Loosen the bolts , fixing the closing coil.Remove the defected coils toward the front cover.After reassembling, check the operation of thecontactor electrically.Connect the leads of the closing coilReverse the action in the previous step.

>> 21

VC | HCA Series

3) Replacing the Auxiliary SwitchRelease the pusher .Release the support and remove the wires fromthe auxiliary switch.If the closing switch needs replacement ,loosen the bolt and wires.If need to replace the auxiliary switch , releasethe bolt and cable.Reverse the action in the previous step and check theoperation of the switch manually using the closing handleCheck the operation of the Switch electrically.

Note and check the relationshipbetween each wire and itsassociated Auxiliary Switch terminal.

Coil support /Closing Coil /Rear PlateCoil CoreBoltGap plateStainlessRubber Plate

Auxiliary Switch Support /Auxiliary Switch /Closing SwitchM4 BoltM4 BoltPusherM5 BoltClosing Handle

CLOSING


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4) Replacing the vacuum interrupter Release the pressing plate.Release the Insulation rod from the vacuumInterrupter, and separate the flexible connector .

Loosen the upper fixing bolts from the upper connector .Replace the new vacuum interrupter.Reverse the action in the previous step and check thestroke and wipe of the vacuum interrupter.

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4.5 Troubleshooting

>> 23

VC | HCA Series


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