Vacuum Interrupterfor Medium-Voltage from 7.2kV to 40.5kV

VacuumInterrupter

Contents

Product Scope 04

Technical Information 06

Quality Assurance 08

Dimensions 10

Vacuum Tester 11

Ordering Information 11

Vacuum Interrupter is ...

HYUNDAIvacuuminterruptersweredevelopedin1987andmassproduction

began in 1990. The best materials are used in the manufacturing of

the vacuum interrupters, which can satisfy electrical and mechanical

requirementsatthesametime.

A further and important step in the development of innovative vacuum

interrupters is the brazing process developed by HYUNDAI for the

permanentsealingofthevacuumchamberinthemechanically

stablebondingofthemetallicandceramicpartsoroxygen

freecopperandcontacttips.

HYUNDAI’scompactandlightweightvacuum

interruptersareconstantlybeingimprovedto

meetthedemandsoftheglobalmarket.

VacuumInterrupter

Product Scope

1)forvacuumcontactor2)foroiltapchanger

✽Allvacuuminterruptersarebasicallyapplicabletovacuumcircuitbreaker.

3)forvacuumswitch4)forC-GIS(cubicletypegasinsulatedswitchgear)

5)formediumvoltageGIS(gasinsulatedswitchgear)

Ratings Modelname

Ratedvoltage Ratedlightningimpulsevoltage

Powerfrequencywithstandvoltage Ratedcurrent

Short-circuitbreakingcurrentwithatleast30-40%DCcomponentandinterrupter

4/4.3kA 12/12.5kA

7.2kV 60kV 20kV

400AHVC007031)

HVC007041)

HVC007092)

630A HVS00706700/800A HVC007102)

1200/1250A HVC007122)

1600A2000A2500A3150A

12kV 75kV 28kV

400A HVC012041)

630A1200/1250A

1600A2000A2500A3150A

4000A

17.5kV 95kV 36kV

630A1200/1250A

1600A2000A

2500A

3150A

24/25kV 125kV 50kV

630A

HVC024073)

HVC024083)

HVC024093)

HVS02414HVS02417

1200/1250A1600A2000A3150A

36/38kV 170kV 70kV

630A1200/1250A

1600A2000A

3150A

40/40.5kV 185kV 85kV

630A1200/1250A

1600A2000A2500A3150A

HYUNDAIHEAVYINDUSTRIES 4 . 5

ModelnameShort-circuitbreakingcurrentwith

atleast30-40%DCcomponentandinterrupter20kA 25kA 31.5kA 40kA 50kA

HVS01225 HVS01725

HVS01750(4.76kV)

HVS10007

HVS020274)

HVS12015 HVS01240

HVS10027HVS01753HVS01754

HVS01726HVS01745

HVS10005 HVS01746HVS01750

HVS10007 HVS01752HVS01747HVS01753HVS01754HVS10027

HVS020284)

HVS02421HCB200055) HVS02440HVS02435 HVS02430 HVS03640

HVS03627 HVS03642HVS03644

HVS03640 HVS03645

HVS020294) HVS024324)

HVS04030

ProductScope

VacuumInterrupter

High Short-Circuit Breaking Capacity

HYUNDAIvacuuminterruptersrealizehighshort-circuitbreakingcapacityatcompactsizebyapplingtwogeometricallydifferentcontactsaccordingtospecification.Radialmagneticfieldcontactflowhighercurrentthroughaconstrictedarc,andaxialmagneticfieldallowsadiffusearcevenwherethecurrentintensityishigh.BoththeradialandaxialmagneticfieldsareproducedbyspecialcurrentpathsprovidedinthecontactsunderthesurfaceasshowninFig.4andFig.5.

Low Chopping Current

Belowacertainminimumcurrent,themetalvapourarcisinterruptedpriortothenaturalcurrentzero.Whenthecurrentisinterruptedbychoppingphenomenon,theovervoltageshallappearjustbeforethenaturalcurrentzeropointasshowninFig.1.Thereforethischoppingcurrentmustbeaslowaspossibleinordertopreventthebuild-upofimpermissiblyhighovervoltage.

Themagnitudeofchoppingcurrentdependslargelyonthecontactmaterialused.TheCrCucontactmaterialkeepsthechoppingcurrentbelow5A.

Technical Information

Fig.1 Overvoltageduetocurrentchoppingwheninterruptinganinductivecurrent

Fig.2 Singlephaseequivalentcircuitforinterruptinginductivecurrent

Un:Power-frequencyphasetoearthvoltageUa:Voltageatload-sidebreakerterminalsUp:Maximumovervoltageontheloadsidei :Power-frequencecurrentIa :Choppingcurrent

Un:Power-frequencyphasetoearthvoltageUa :Voltageatload-sidebreakerterminalsi :LoadcurrentLn :InductanceofpowersystemL :InductanceofloadC :Capacitanceofload

HYUNDAIHEAVYINDUSTRIES 6 . 7

High Dielectric Strength

Onopeningofthecontact,thecurrenttobeinterruptedproducesametalvapourarcdischargeandcontinuesflowingthroughtheplasmauntilthenextcurrentiszero.Thearcisextinguishedinthevicinityofthecurrentzero,andthemetalvapourlosesitsconductivitywithinafewmicroseconds.Thedielectricstrengthofthebreakisthusre-establishedveryquickly.

Thesteadystateofpressureinavacuuminterrupterislessthan1x10-7mbar.Contactclearancesof2mmto20mmsufficeandthereforeproducesahighdielectricstrengthasshowninFig.3.

Minimal Contact Erosion

Themetalvapourplasmaofthevacuumarcishighlyconductive.Thearcvoltageandtheenergyconversioninthebreakarelikewiseminimal.Thehighconductivity,inconjunctionwiththeminimalenergyconversionandshortarcingtimesarethereasonsfortheminimalcontacterosionandlongelectricalservicelifeofourvacuuminterrupters.

Fig.3 Dielectricstrengthinvacuum

Fig.4 Radialmagneticfieldcontact Fig.5 Axialmagneticfieldcontact

ContactconstructionA:Arcingring: ContactmaterialCrCuB:Contactcarrier

Currentpathanddirectionofaconstrictedarc

100

80

60

40

20

0

Dielectricstrength(kV)

10-8 10-6 10-4 10-2 100 102 104 106

Pressure(mbar)DataElectrodegap:0.8mm,Electrodediameter:10mm

200

150

100

50

05 10 15 20

Contactgap(mm)

HighvacuumSF61bar

Dielectricstrength(kV)

Switchoil

Air1bar

TechnicalInformation

ContactpiececonstructionB:ContactcarrierC:ContactdiscCrCu

Currentdistributionofadiffusearc

VacuumInterrupter

Quality Assurance

HYUNDAIvacuuminterruptershavebeenverifiedbytypetestsatKEMAandKERIlaboratoriesaccordingtoIECandANSIperformancestandards,andmaintainitsreliabilitybasedonaqualityassuranceprogramISO9001.

Material Testing

Materialtestingisofparticularsignificanceduetothespecialmaterialsused.Allmaterialsofstructuralandoperationalcomponentswhichcaninfluencefunctionandservicelifeofavacuuminterrupterelements,aretestedinourowntestinglaboratory.

Thetechnicaldataofthematerialsareverytighttolerancerangesandarecheckedoneveryconsignmentdelivered.

Quality Assurance

Vacuum Interrupters

HYUNDAIHEAVYINDUSTRIES 8 . 9

Internal Pressure Testing

Completingthewholeprocess,eachvacuuminterrupterissubjecttoitsairtightnesstodeterminetheservicelifeexpectancy.Aspecialinternalpressuremeasuringprocesshasbeendevelopedtotestforleakageevenaftertheinterrupterhasbeensealed.

Inastationaryfacility,electricalandmagneticfieldaresuperimposedinasuchwaythatfreeelectronsionizeanyresidualgasmoleculesandproduceameasuringcurrentthatvariesasafunctionofthepressure.Allinterruptersarestoredinargonandthentestedbymeansofthisprocess.Theyarereleasedforshipmentonlyifaleakagerateofupto1x10-13mbarxℓ/sisnotexceeded.

Thisamountstoastoragetimeof20yearswithoutanylossinquality.Thefollowingfigureshowstheprincipleofinnerpressuremeasuringforvacuuminterrupters.

Measuringresistorforioncurrent

Magnetcoil Electricfield Magneticfield

Testobject vacuuminterrupter

Metallichousingforanode

Contactsforcathode

Testingvoltage

QualityAssurance

VacuumInterrupter

Dimensions

D

H

TYPE H DHVC00703 93 53HVC00704 113 60HVC00709 135 60HVC00710 135 70HVC00712 188 87HVC01204 126 79

STYLE A

D

H

TYPE H DHVC02407 190 60HVC02408 190 60HVC02409 153 60HVS01225 167 81HVS01725 200 81HVS01726 203 104HVS01746(5) 277 104HVS02027 261 104HVS02028 270 104HVS02029 275 104HVS02414 277 81HVS02417 219 81HVS02421 277 104HVS02430 304 130HVS02432 324 130HVS02435 310 130HVS03640 483 130HVS12015 219 110

STYLE C

D

H

TYPE H DHVS01240 455 154HVS01747 313 110HVS01750 275 110HVS01752 313 125HVS01753 313 125HVS01754 312 140HVS02440 311 135HVS03627 371 110HVS03642 484 152HVS03644 483 135HVS03645 483 154HVS10005 345 152HVS10007 344 154HVS10027 368 152HCB20005 421 133

STYLE D

D

H

TYPE H DHVS04030 537 134

STYLE E

D

H

TYPE H DHVS00706 155 60

STYLE B

HYUNDAIHEAVYINDUSTRIES 10 . 11

Ordering Information

Lighteningimpulsewithstandvoltagetestforvacuuminterrupters

Vacuum Tester

HYUNDAI VACUUM TESTER (HVT-1)

HVS

MODEL

HVC ForVacuumContactor

HVS ForVacuumCircuitBreaker

HCB ForMediumVoltageGIS

1725

PARTNO.

RefertoProductScope(page4-5)

V1-V3 (Ordering Grouping)

Dimensions/VacuumTester/OrderingInformation

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