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【英文标准名称】:StandardTestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsatCommercialPowerFrequencies
【原文标准名称】:固体电绝缘材料在商用电源频率下的介电击穿电压和介电强度的标准试验方法
【标准号】:ASTMD149-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D09.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:breakdown;breakdownvoltage;calibration;criteriaofbreakdown;dielectricbreakdownvoltage;dielectricfailure;dielectricstrength;electrodes;flashover;powerfrequency;process-controltesting;prooftesting;quality-controltesting;
【摘要】:Thedielectricstrengthofanelectricalinsulatingmaterialisapropertyofinterestforanyapplicationwhereanelectricalfieldwillbepresent.Inmanycasesthedielectricstrengthofamaterialwillbethedeterminingfactorinthedesignoftheapparatusinwhichitistobeused.Testsmadeasspecifiedhereinaresuitableforusetoprovidepartoftheinformationneededfordeterminingsuitabilityofamaterialforagivenapplication;andalso,fordetectingchangesordeviationsfromnormalcharacteristicsresultingfromprocessingvariables,agingconditions,orothermanufacturingorenvironmentalsituations.Thistestmethodisusefulforprocesscontrol,acceptanceorresearchtesting.Resultsobtainedbythistestmethodcanseldombeuseddirectlytodeterminethedielectricbehaviorofamaterialinanactualapplication.Inmostcasesitisnecessarythattheseresultsbeevaluatedbycomparisonwithresultsobtainedfromotherfunctionaltestsorfromtestsonothermaterials,orboth,inordertoestimatetheirsignificanceforaparticularmaterial.ThreemethodsforvoltageapplicationarespecifiedinSection12:MethodA,Short-TimeTest;MethodB,Step-by-StepTest;andMethodC,SlowRate-of-RiseTest.MethodAisthemostcommonly-usedtestforquality-controltests.However,thelonger-timetests,MethodsBandC,whichusuallywillgivelowertestresults,willpotentiallygivemoremeaningfulresultswhendifferentmaterialsarebeingcomparedwitheachother.Ifatestsetwithmotor-drivenvoltagecontrolisavailable,theslowrate-of-risetestissimplerandpreferabletothestep-by-steptest.TheresultsobtainedfromMethodsBandCarecomparabletoeachother.Documentsspecifyingtheuseofthistestmethodshallalsospecify:Methodofvoltageapplication,Voltagerate-of-rise,ifslowrate-of-risemethodisspecified,Specimenselection,preparation,andconditioning,Surroundingmediumandtemperatureduringtest,Electrodes,Whereverpossible,thefailurecriterionofthecurrent-sensingelement,andAnydesireddeviationsfromtherecommendedproceduresasgiven.Ifanyoftherequirementslistedin5.5aremissingfromthespecifyingdocument,thentherecommendationsfortheseveralvariablesshallbefollowed.Unlesstheitemslistedin5.5arespecified,testsmadewithsuchinadequatereferencetothistestmethodarenotinconformancewiththistestmethod.Iftheitemslistedin5.5arenotcloselycontrolledduringthetest,itispossiblethattheprecisionsstatedin15.2and15.3willnotbeobtained.Variationsinthefailurecriteria(currentsettingandresponsetime)ofthecurrentsensingelementsignificantlyaffectthetestresults.AppendixX1.containsamorecompletediscussionofthesignificanceofdielectricstrengthtests.1.1Thistestmethodcoversproceduresforthedeterminationofdielectricstrengthofsolidinsulatingmaterialsatcommercialpowerfrequencies,underspecifiedconditions.,1.2Unlessotherwisespecified,thetestsshallbemadeat60Hz.However,thistestmethodissuitableforuseatanyfrequencyfrom25to800Hz.Atfrequenciesabove800Hz,dielectricheatingisapotentialproblem.1.3ThistestmethodisintendedtobeusedinconjunctionwithanyASTMstandardorotherdocumentthatreferstothistestmethod.Referencestothisdocumentneedtospecifytheparticularoptionstobeused(see5.5).1.4Itissuitableforuseatvarioustemperatures,andinanysuitablegaseousorliquidsurroundingmedium.1.5Thistestmethodisnotintendedformeasuringthedielectricstrengthofmaterialsthatarefluidundertheconditionsoftest.1.6Thistestmetho......
【中国标准分类号】:K15
【国际标准分类号】:
【页数】:13P.;A4
【正文语种】:英语