印度某MW电厂电气作业指导书30

Theisolatingswitch第9页共9页InstructionforinstallationandtestTheisolatingswitch1.Relateddocumentationsandstandards1.1.TheChinesestandard(GBJ147-90):Codeforconstructionandacceptanceofthehighvoltageequipment1.2.TheChinesestandard(GB50150-91):Standardforhand-overtestofelectricequipment1.3.TheChinesestandard(DL408-91):Operationcodeforpowerplantsafety1.4.TheChinesestandard(DL560-95):Operationcodeforelectricsafetyinhighvoltagelaboratory1.5.TheChinesestandard(DL/T5043-95):Designstandardforelectricallaboratoryofthermalpowerplant1.6.TheChinesestandard(DL/T5161.2-2002):Specificationforconstructionqualitycheckoutandevaluationofelectricequipmentinstallation2.Receiptandstorage2.1.Examinethestateofthedevicesandthematerialsreceivedtocheckthatitcorrespondswithwhatwasordered.2.2.Checkallpackagesforexternalsignsofdamage.2.3.Pleasecheckconditionandqualityofthedevicesandthematerials,andcomparethemwiththepackinglist.2.4.Ifonunpacking,whichmustbecarriedoutcarefully,anydamageorirregularityisnoted,notifythiswithindefiniteperiodofreceiptofthegoods,notificationmustindicatetheshippingnotenumber.2.5.Ifthedevicesistobestoredforevenshortperiodsbeforebeingputintoservice,afterreceiptitisadvisabletoputitbackintoitsrelativecontainerandcoveritwithawaterprooftarpaulin.Useadryanddust-freeambientforstoragewithoutanyaggressivechemicalagents.Placethedeviceandanyfixedpartonahorizontalsurfacenotindirectcontactwiththefloor,butonasuitablesupport.2.6.Selectalocationforthedeviceinaclean,dry,vibration-freeareawithmoderatetemperature.2.7.Withregardtolifting,followtheseinstructions:thedevicesmustbeplacedonasturdysurfaceandpreferablyliftedusinganappropriateliftingforktruck.Theuseofropesis,however,permitted:inthiscasetheliftingropesmustbehookedfirmly.3.Installation3.1.Allcomponentparts,auxiliaryparts,sparepartsshouldbecomplete,notdamage,deformedorcorroded.Porcelainpartsshouldhavenocrackordamage.Equipmentsandporcelainpartsshouldbesafelystored,shouldnotbedamagedbybeinginclinedorfallingdown.Anticorrosionmeasuresshouldbetakenformetallictransmissionpartsofcontactsandoperatingmechanisms.3.2.Connectionterminalsandconductingpartsareclean,contactsaregood,nopeelingonsilverplatedlayerofthecontactsurfaces.Insulatorsurfaceshouldbeclean,nocrack,nodamageandnoweldingresidualspots.Theporcelainpartsshouldbefirmlycementedtoironfittings.Rotatingpartsoftheisolatingswitchbaseshouldrotatefreelyandbepastedwithlubricatinggreasesuitableforthelocalclimate.Componentpartsoftheoperatingmechanismsshouldbecomplete,allfixedconnectionpartsshouldbefirmlytightened,lubricategreasesuitableforthelocalclimateshouldbeappliedtorotatingparts.3.3.Assemblageoftheisolatingswitchesshouldconformtofollowingrequirements:3.3.1.Deviationofdistancesbetweenphasesshouldnotbegreaterthan10mmforvoltage110kVandbelowand20mmforvoltageabove110kV.Theinterconnectingrodsbetweenphasesshouldbeonasamelevel.3.3.2.ThepostinsulatorsshouldbeperpendiculartotheirbaseplaneexceptVtypeisolatingswitchesandbeconnectedfirmly.Insulatorcenterlinesofsameinsulatorcolumnshouldbeonsameperpendicularline.Insulatorcolumncenterlinesofsamephaseshouldbeonsameperpendicularplane.3.3.3.Insulatorcolumnsofsameisolatingswitchshouldbeconnectedfirmly.Metalpadscanbeusedtocompensatehorizontalorverticaldeviationstomakethecontactsinalignmentandtomakegoodcontacts.Thecrevicesshouldbefilledwithgreasypasteandpainted.3.3.4.Thevoltagegradingandscreeningringsorcoversshouldbeinstalledcorrectlyandfirmly.3.4.Installationandadjustmentofthetransmissiondevicesshouldconformtofollowingrequirements:3.4.1.Innerdiameterofthepullrodsshouldmatchwithshaftdiameteroftheoperatingmechanismandgapbetweentherodandtheshaftshouldnotbegreaterthan1mm.Thepinsforconnectionsshouldnotbecomeloosened.3.4.2.Aprotectingringshouldbeinstalledifapullroddamageorbreakagemaycauseittobeincontactwithaliveconductingpartsandthuscausingafault.3.4.3.Transmissionpartssuchasprolongedshafts,bearings,couplings,mediumshaftbearings,cornerarmsandetc.shouldbeinstalledintheircorrectpositionandfixedfirmly.Transmissiongearsshouldmatchcorrectlyandtheiroperationiseasyandfree.3.4.4.Positioningscrewsshouldbeadjustedaccordingtotechnicalrequirementsfortheproductsandthenfixed.3.4.5.Lubricatinggreasesuitableforlocalclimateshouldbeappliedtoalltransmissionparts.3.4.6.Turningorpullingspringsonthegroundingknifesshouldbetoadjustedthatoperatingmomentisminimumandthenfixed.Blackpaintisappliedtotheverticalconnectingrods.3.5.Installationandadjustmentoftheoperatingmechanismshouldconformtofollowingrequirements:3.5.1.Operatingmechanismsshouldbeinstalledfirmly.Installationpositionsoftheoperatingmechanismonasameaxiallineshouldbeidentical.3.5.2.Manymanualopeningandclosingoperationshouldbeperformedfirstlybeforemakinganelectricorapneumaticoperationandtheoperatingmechanismsshouldoperatecorrectly.3.5.3.Rotatingdirectionofthemotorshouldbecorrectandindicationofthepositionshouldconformtotheactualopeningorclosingpositionoftheequipment.3.5.4.Operatingmechanismsshouldoperatesteadily,noblocking,impactorabnormalphenomena.3.5.5.Positionlimitingdeviceshouldoperatecorrectlyandreliably.Electricorgassupplyshouldbecutoffreliablywhenreachingstipulatedopeningorclosinglimitingposition.3.5.6.Joints,valves,hepipelinesshouldnothaveseepageorleakage.3.5.7.Sealpadsonthemechanismboxesshouldbetight.3.6.Relativepositionsandsparetravelsofthecontactsinclosingpositionoftheisolatedswitchesandcleardistancesbetweenthecontactsinopeningpositionarecorrect.3.7.Arcingcontactsshouldmakebeforethemaincontactswhenclosetheisolatedswitcheswitharcingcontactsandbreakafterthemaincontactswhenopenthem.3.8.Thenon-simultaneityofcontactsforthreephaseunitedoperationshouldconformtostipulationasshownintable3.8orinaccordancewithspecificationsoftheproducts.Table3.8.:Permissiblenon-simultaneitylimitingvalveforthreephaseisolatedswitchesVoltage(kV)Difference(mm)10~35563~13210220~400203.9.Conductingpartsoftheisolatingswitchesshouldconformtofollowingstipulations:3.9.1.A0.05mm×10mmfeelergagecan’tgetinlinecontactsurfaces,andinsertingdepthofthefeelergageshouldnotexceed4mmfor50mmwidthorlessofcontactsurfacesand6mmfor60mmandmorewidths.3.9.2.Thecontactsshouldtouchtightlyeachother,andcontactpressureontwosidesshouldbeuniformandconformtotechnicalstipulationoftheproducts.3.9.3.Thecontactsurfacesshouldbewellflat,cleanandpastedwithathinlayerofneutralvaseline.Flexiblejointersofconductivepartsshouldnothavebentdamage,andconnectionsshouldbefirmandformatightcontact.Noseriousconcaveorcorrosionspotsonsurfacesoftheconductingparts.3.9.4.Applyathinlayerofelectriccompoundgreaseonterminalsurfacesoftheequipment.3.10.Interlockdevicesoftheisolatedswitchesshouldoperatefreely,accuratelyandreliably.Mechanicalorelectricalinterlocksbetweengroundingknifeandmaincontactfortheisolatedswitcheswithagroundingknifeshouldbecorrectandreliable.3.11.Installauxiliaryswitchesoftheisolatedswitchesfirmly,operationisaccurateandcontactistight.Theirmountingpositionshouldbeeasilyaccessibleforinspection.Providerain-proofmeasureswheninstalloutdoorswitches.3.12.Manualoperatedgroundingswitchesshouldoperatefreelyandreliablyandtheirclosingtimeshouldmeetrequirementsoftheprotectionrelay.Examinethebufferscarefully,andtheircompressivetravelmightconformtorequirementsoftheproducts.3.13.Qualitystandardsforinstallandregulatetheisolatedswitchesareasshownintable3.13.Table3.13.:InstallationandregulationoftheisolatedswitchesExaminationitemsPropertyQualitystandardsMethodsandtoolsforexaminationInstallationoftheporcelainpostsExaminationofappearanceMainClean,withoutcrackInspectionExaminationofadhesionbetweenporcelainandironMainFirmBoltsforconnecttheporcelainpostsandtheoperationshaftsonbaseplanesTightCheckbyawrenchVisualexaminationofthevoltageequalizingringsClean,withoutdamageanddeformationInspectionConductivepartsExaminationofflexiblesoftconnectionReliable,withoutdamagePullExaminationofthewiringterminalsMainCleanandneat,coatelectriccompoundgreaseInspectionExaminationofcontactpartsSilverplatedlayeronthecontactsurfacesPerfect,withoutpeelInspectionLinecontactMainCan’tsqueezeinCheckbya0.05mm×10mmfeelergageContactwidth≤50mmMainDepthsqueezingingap≤4mmContactwidth≥60mmMainDepthsqueezingingap≤6mmTransmissionequipmentTransmissioncomponentsInstallationofthecomponentsCorrectconnection,solidfixtureInspectionOperationexaminationAccurate,flexibleandeasyOperateRegulationofthepositionboltsMainReliable,inflectionarmexceednotdeadpointOperateExaminationoftheauxiliaryswitchesReliableoperation,tightcontactOperateMechanicalorelectricalinterlockbetweenthegroundingknifeandthemaincontactMainAccurateandreliableTestOperationexaminationforthepositionlimitingdevicesMainTripoffpowersupplyreliablyatopeningorclosinglimitpositionsOperateExaminationofthesealpadsinthemechanismboxesCompleteInspectionRegulationoftheisolatedswitchesClosingstatusRelativepositionofthecontactsMainInaccordancewithmanufacturestipulationCheckdependonmanufacturestipulationSparetravelContactpressureattwosidesofthecontactsMainCleardistanceandanglebetweenthecontactsinopeningconditionMainInaccordancewithmanufacturestipulationCheckdependonmanufacturestipulationNon-simultaneityofcontactsforthreephaseunitedoperationOperationsequenceofthearc-contactsandthemaincontactsCorrectOperateInterlocktestingoftheisolatedswitchesandtheoperationmechanismsMainSteadyoperation,withoutblockEarthEarthofthebasesFirmandconductivePullandconductanceexaminationEarthofthemechanismboxesExaminationoftheanti-loosepartsMainTightanti-loosenuts,openforelocksInspectionMarkofphasecolorCorrectandclearTreatmentofholesTightseal4.Test4.1.Measureinsulationresistancesoftheorganictransmissionrods.Measuredinsulationresistancesmustbehigherthanstandardvaluesasshownintable4.1.Table4.1.:StandardinsulationresistancesoftheorganictransmissionrodsRatedvoltage(kV)3~1520~3563~220330~500Standardinsulationresistance(MΩ)120030006000100004.2.MeasureDCresistancesoftheisolatedswitchesinaccordancewithtechnicalstipulationsoftheproducts.4.3.Carryout1min.50HzACvoltagewithstandingtestsandtestvoltagestandardsareasshownintable4.3.Table4.3.:TestvoltagestandardsofACvoltagewithstandingtestRatedvoltage(kV)6.62033132220Standardtestvoltage(kV)33.56895.73024504.4.Minimumoperationvoltageofthecoilsintheoperationmechanismsshouldconformtostipulationsofthemanufactories.4.5.Mainknifesandgroundingknifesoftheisolatedswitchesmustbeopeningorclosingreliablywhentheirvoltagesorpneumaticpressuresareinfollowingranges:4.5.1.Thevoltageonterminalsofthemotorformotoroperationmechanismisinrangeof80%~110%oftheratedvoltage.4.5.2.Thepneumaticpressureofpressedairintheoperationmechanismisinrangeof85%~110%oftheratedpneumaticpressure.4.5.3.Thevoltageonterminalsofsecondarycontrolandelectromagneticinterlockcoilsisinrangeof80%~110%oftheratedvoltage.4.6.Testrecordsforisolatedswitchesareasshownintable4.6.Table4.6.:TestrecordsoftheisolatedswitchesProjectnameTypeRatedvoltage(kV)Ratedcurrent(A)Ratedfrequency(Hz)OperationmechanismOperationmannerManufactoryManufacturenumberManufacturedateTestitemsStandardsResultsRemarkInsulationresistancesAphaseBphaseCphaseDCresistancesoftheconductivecircuitsAphaseBphaseCphaseACvoltagewithstandtestsAphasetoB,CphasesandgroundBphasetoC,AphasesandgroundCphasetoA,BphasesandgroundTestingofminimumvoltageofcoilsinoperationmechanismTestingoftheoperationmechanismTestconclusionRepresentativeoftestersSignatureDate5.Puttingintoservice5.1.Generaldescription5.1.1Whenfinishedwiththeoriginalinstallationandallmodifications,conductacompleteoperationtestontheentireinstallationtoverifycompliancewithapplicablestandards.Testingshouldbeconductedbyafactory-trainedtechnicianinthepresenceofarepresentativeofthemanufacturerandtheowner’srepresentative.Followproceduresoutlinedintherelatedstandard.5.1.2.Periodictestingandservicingofthesystem,alldevices,andanyotherassociatedequipmentisessentialtoensureproperandreliableoperation.Testandservicethesystemandthedeviceaccordingtotheschedulesandproceduresoutlinedinthemanufacturer’smanuals.5.1.3.Betweenformalperiodictestingandservicingintervals,therelatedoperationchecksshouldbeperformedfordefiniteperiod,orfrequentlywhenrequiredbytheowner.5.2.Regulationrecordsoftheisolatedswitchesareasshownintable5.2.Table5.2.:RegulationoftheisolatedswitchesProjectnameTypeRatedvoltage(kV)Ratedcurrent(A)Ratedfrequency(Hz)OperationmechanismOperationmannerManufactoryManufacturenumberManufacturedateRegulationitemsPermittedvalueMeasuredvalueRemarkClearancebetweeninnerdiametersofthepullingrodsanddiametersoftheoperationmechanismshafts(mm)≤1mmErrorofdistancesbetweenphases(mm)BetweenA-BphasesBetweenB-CphasesRegulationofthecontactsInserteddepthsofthemovingcontacts(mm)AphaseBphaseCphaseSparetravels(mm)AphaseBphaseCphaseClearancesbetweenthecontactsinopencondition(mm)AphaseBphaseCphaseNon-simultaneity(mm)AphaseBphaseCphaseExaminationconclusionAcceptanceopinionsSignatureDateConstructiongroupConstructionteamQualitydepartmentSupervisorydepartment6.Safetyprecautions6.1.Theinstallationhastobecarriedoutbyqualifiedpersonalfollowingtheinstructionofthemaker.Onlyqualified,authorizedpersonsshouldcarryoutelectricalwork.Wiringshouldbeperformedbythequalifiedpersonnelonly.6.2.Adisconnectswitchmustbeinstalledtobreakallcurrentcarryingconductors.Beforemakinganyelectricalconnectionensurethatthemainswitchisoff,alloftheelectricalpowerlinestotheequipmentmustbeisolated.Failuretoobservethisprecautionmayresultinseriouspersonalinjury.6.3.Allmainscablesandsignalcablesmustbeconnectedinexactaccordancewiththeoperatinginstructionstoavoidtheriskofelectricshock.6.4.Whilethedevicesarepowered,apotentiallylethalshockhazardexistsinsidethedevices.Donotopenthedeviceswhilethedevicesarepowered.6.5.Theinstrumentmustbegroundedorearthed.6.6.Iftheapparatusisdamagedoritislikelytheprotectionhasbeenimpaired,theapparatusshouldbeswitchedoffandsecuredagainstunintendeduse.6.7.Mustcarryoutfollowingprocedurebeforemaintenance