Technical Specification 24kV Switchgear QGDW10316.docx

Technical Specification 24kV Switchgear QGDW10316.docx

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TechnicalSpecification24kVSwitchgearQGDW10316

Q/GDW

JiangsuElectricPowerCompany

CompanyStandard

Q/GDW-10-316-2007

TechnicalSpecificationof

20kVAlternatingCurrentGasInsulatedMetalEnclosedSwitchgear

Released:

Sep20,2007

CONTENT

Foreword………………………………………………………………………………………….3

1Scope…………………………………………………………………………………….4

2Normativereferences…………………………………………………………………..4

3Environmentalconditions………………………………………………………………5

4Technicaldataandrequirement……………………………………………………..6

5Teststandardandrequirement……………………………………………………12

FOREWORD

Theobjectofthestandardistopromoteapplicationof20KVformediumvoltagenetworkinJiangsuElectricPowerCompany.TheexistingGB,DLandcompanystandardprovideverylittlerequirementof20KVelectricalequipment.ThisstandardiseditedInordertoassurethatthe20KVelectricalequipmentfulfillthenetworkrequirement.

Thisstandardisoneofthe9standardsfor10KVand20KVequipment,whicharelistedasbelow:

1.TechnicalSpecificationof220/110/20,220/20KVPowerTransformer

2.TechnicalSpecificationof110/20KVPowerTransformer

3.TechnicalSpecificationof20KVCircuitBreaker

4.TechnicalSpecificationof20KVDisconnector

5.TechnicalSpecificationof20KVACMetralEnclosedSwitchgear

6.TechnicalSpecificationof20KVACGISMetalEnclosedSwitchgear

7.TechnicalSpecificationof20KVCapacitorBanks

8.TechnicalSpecificationof20KVShuntreactors

9.TechnicalSpecificationof20KVEarthingResistor

ThestandardformatisinaccordancewithGB/T1.1andDL/T600-2001.

ThestandardisproposedandexplainedbyJiangsuPowerCompany,Production&TechnicalDepartment.

ThestandardiscoordinatedbyJiangsuPowerCompany,Production&TechnicalDepartment.

Thestandardwaseditedby:

-JiangsuPowerCompany,Production&TechnicalDepartment

-SuzhouPowerSupplyCompany

-JiangsuElectricTestInstituteCo.,Ltd

Editor:

TangJun,GaoShan,ChenShaobo

TechnicalSpecificationof

20KVACGISMetalEnclosedSwitchgear

1.Scope

Thistechnicalspecificationclassifiedgroupsoftechnicalrequirementincludingmaintechnicalparameters,functionaldesign,construction,characteristics,installationandtest,towhichthe20KVGISSwitchgearwith0.3Mpadesignpressurearesubjected.

Therequirementstipulatedinthespecificationisthelowesttechnicalrequirement,notcoveringalldetails,neithercoveringallnominativereferencesorstandards.Theequipmentmanufacturersshallprovidehighqualityproductsinaccordancetothisstandard,GBstandard,DLstandardandInternationalstandard.

Whereconflictexistsbetweenthisstandardandmanufacturer’sstandard,thehigherstandardshallapply.

Theneutralpointof20KVnetworkisearthedviasmallresistance.

2.NominativeReferences

Thefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument（includinganyamendments）applies.

GB156

Standardvoltage

GB311.1

Insulationco-ordinationforhigh-voltagetransmissionanddistributionequipment

GB1408

Testmethodofpowerfrequencyelectricstrengthofsolidinsulatingmaterial

GB2900.1

ElectricalTerms,BasicTerms

GB3309

MechanicaltestofHVSwitchgearundernormaltemperature

GB3906

ACmetalenclosedswitchgearandcontrolgearforratedvoltageabove3.6kvanduptoandincluding40.5kv

GB7354

Measurementofpartialdischarge

GB/T11022

Commonspecificationforhigh-voltageswitchgearandcontrolgearstandards

SD/T318

TechnicalspecificationofHVSwitchgearinterlockingdevice

DL/T402

HValternating-currentCircuitBreaker

DL/T403

VacuumCircuitBreakerforratedvoltageabove12kvanduptoandincluding40.5kv

DL/T404

IndoorHVACSwitchgear

DL/T486

ACHVDisconnectorandEarthingSwitch

DL/T539

Condensationtestanddirtytest?

?

ofindoorACHVSwitchgearandcomponents

DL/T593

Commonspecificationforhigh-voltageswitchgearandcontrolgearstandards

DL/T615

SelectionofmainparameterofHigh-voltageACcircuitbreaker

DL/T617

Gasinsulatedmetalenclosedswitchgear

DL/T728

GISmetalenclosedswitchgear–orderingguidance

DL/T791

Indoorgasinsulatedswitchgear

IEC62271-102

HVACDisconnectorandearthingswitch

IEC62271-201

ACmetalenclosedswitchgearandcontrolgearforratedvoltageabove1kvanduptoandincluding38kv

IEC60480

VerificationofSF6gasinelectricalequipment

JiangsuPSB

2002No320

Guidelineofacceptancetestandpreventativetestofelectricalequipment

3.Environmentconditions

3.1

Altitude

1000m

3.2

Max.Ambienttemperature

+40°C

3.3

Min.Ambienttemperature

-25°C（isthismandatoryeverytime?

?

）

3.4

Max.Temperaturechange/day

25K

3.5

Indoorrelativehumidity

Averageperday95%

Averagepermonth90%

3.6

Resistancetoearth-quakes

（only8DAandNXPlusChasaninterntlreportLDnot）

Horizontal:

02g

Vertical:

0.1g

Vibration:

5cycles5withinterval2sSafetyfactor:

1.67

3.7

Ratedfrequency

50Hz

3.8

Installation

Indoor

4.Technicaldataandrequirement

4.1

TechnicalData

4.1.1

Type

20KVSF6insulatedmetalenclosedswitchgear

4.1.2

Ratedvoltage

24kV

4.1.3

Ratedfrequency

50Hz

4.1.4

Ratedcurrentpanel:

630A/1250A/2500A（8DA2500AOKNXPlusC200A）

Ratedcurrentbusbar

1600A/2000A/2500A

4.1.5

TemperatureRise:

Temperatureriseofmaincircuitunderratedcurrentandratedfrequency,shouldfulfillnotonlyGB/T11022standard,butalsothestandardrelevanttoeachindividualcomponents.Thetemperatureriseofaccessibleenclosureandcoversshouldnotexceed30K.?

?

?

?

4.1.6

Ratedshortcircuitbreakingcurrent

25KA/31.5KA（NXPlusConly25kA）

4.1.7

Ratedmakingcurrent（peak）

63KA/80KA（NXPlusConly63kA）

4.1.8

Ratedshorttimewithstandcurrent（4s）mandatory?

?

?

25KA/31.5KA

4.1.9

Ratedpeakwithstandcurrent

63KA/80KA

4.1.10

Insulationlevel

a）Powerfrequencywithstandvoltage（1min）

Phasetoearth:

50（65）KV

Isolatingdistance:

64（79）kV

ValuesinbracketsifneutralpointnotearthedmostsituationinChina

b）Lightningimpulsewithstandvoltage（1.2/50s,peak）

Phasetoearth:

95（125）KV

Opengap:

110（145）kV

c）creepagedistance

Pureporcelain18mm/kV

Epoxy20mm/kV

4.1.11

Auxiliaryvoltage

Auxiliaryvoltage:

AC/DC220V

Open/CloseSolenoid:

DC220V

4.2

CircuitBreaker

4.2.1

Type

VacuumorSF6

4.2.2

RatedVoltage

24KV

4.2.3

RatedFrequency

50Hz

4.2.4

RatedCurrent

630A/1250A/2500A

4.2.5

Ratedshortcircuitbreakingcurrent

25KA/31.5KA

4.2.6

Ratedmakingcurrent（peak）

63KA/80KA

4.2.7

Ratedshorttimewithstandcurrent（4s）

25KA/31.5KA

4.2.8

Ratedpeakwithstandcurrent

63KA/80KA

4.2.9

Insulationlevel

Sameas4.1.10

4.2.10

Operatingauxiliarypower

Motor:

AC220V

Open/CloseSolenoid:

DC220V

4.2.11

Installation

Refertoscopeofsupply

4.2.12

Ratedoperatingcycle:

MainincomerandBussection:

Outgoing:

0–180s–CO–180s–CO

0–0.3s–CO–180s–CO

4.2.13

Electricalandmechanicalendurance

Ratedelectricalendurancebreakingshortcircuitcurrent

30times（20timesfor31.5KA）

Ratedelectricalendurancebreakingnormalcurrent

10000times

Mechanicalendurance

>10000times

4.2.14

Ratedcapacitorbanksbreakingcurrent

400（630）A（whatareSIEMENSvalue）

4.2.15

Ratedsmallinductivebreakingcurrent

Over-voltagefactorandchoppingcurrentshouldbeprovidedbymanufacturers

4.2.16

Freeauxiliarycontactforenduser

10NO+10NC

4.2.17

VacuumInterrupter

Servicelife:

20years

Ceramicenclosure

Vacuum1.33x10-3Pa

（translationtobecheckedlaterwithVI）

4.2.18

Operatingcountersshouldbeequippedwithallcircuitbreakers.Thecountershouldcorrect,reliable,longendurance,clearindication,installedatthefrontsideofthepanel,visibleduringoperation.

4.3

Three-positiondisconnector

4.3.1

Mechanicalendurance:

2000timeswithoutmaintenance（mandatory）Ch

4.3.2

Inordertoisolatingandearthing,3-posdisconnectorshouldbeinstalled,withOn/Off/Earthpositions.Disconnectorshallbeinstalledinbetweenbusbarandcircuitbreaker.Thefixedcontactisonthebusbar.（notvalidforthe2008version）

4.3.3

Threephasesofdisconnectorsshouldbesimultaneouslyoperatedbyoneoperatingmechanism.Theratedtechnicaldatafulfilsitem4.3.1

4.3.4

Reliablepositionindicationwithremotesignallingshouldbeprovidedinordertobeeasilyinspectedbytheoperators.Mal-ON/OFFofdisconnectorduetomechanicalstress（i.g.causedbyshortcircuit）duringoperationduetoshouldbeavoided.Disconnectorshallbeabletobreaksmallcurrent（i.g.circuitbreakerchargingcurrent）.Instantaneousovervoltageshouldnotoccuratcontrolcircuitorexternalenclosureduringoperation.

4.3.5

Interlockingbetween3-posdisconnectorandcircuitbreakershouldbeprovided.

4.3.6

Operatingmechanismshouldbeheat-proof,frigid-proof,dust-proof,moisture-proof,rust-proof.

4.3.7

Freeauxiliarycontactforbuyershouldbeatlease6NO+6NC.ThecontactshouldbeabletobreakDC220V,5A.

4.4

CurrentTransformer

4.4.1

Type:

CastResin

4.4.2

RatioandAccuracy:

refertoscopeofsupply

4.4.3

Zero-sequenceCTshouldbetwo-halftypesandfastsaturated.Tightandstableinstallation,easyformaintenanceandreplacement.

4.4.4

Otherrequirement:

a）primaryterminalofcurrenttransformerinsidepanelshouldbecopper?

?

?

typeterminals.ScrewtypeterminalisNOTallowed.

b）Shorttimewithstandcurrentrequirementisthesameasforcircuitbreaker.

c）Currenttransformershallbefitforalltypeofoperationmod