【英文标准名称】:StandardTestMethodforHigh-Voltage,Low-Current,DryArcResistanceofSolidElectricalInsulation
【原文标准名称】:固体电绝缘材料的耐高压低电流干电弧性能的测试方法
【标准号】:ASTMD495-1999(2004)
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:高电压;固体绝缘材料;塑料;电绝缘;试验;耐电弧性能;绝缘;电气试验;电气工程;电绝缘材料
【英文主题词】:arcresistance;dryarcresistance;highvoltage;lowcurrent;stainlesssteelelectrodes;tungstenrodelectrodes
【摘要】:1.1Thistestmethodcovers,inapreliminaryfashion,thedifferentiationamongsimilarmaterialswithrespecttotheirresistancetotheactionofahigh-voltage,low-currentarcclosetothesurfaceofinsulation,intendingtoformaconductingpaththereinorincausingthematerialtobecomeconductingduetothelocalizedthermalandchemicaldecompositionanderosion.1.2Theusefulnessofthistestmethodisveryseverelylimitedbymanyrestrictionsandqualifications,someofwhicharedescribedinthefollowingparagraphsandinSection.Generally,thistestmethodshouldnotbeusedinmaterialspecifications.Wheneverpossible,alternativetestmethodsshouldbeused,andtheirdevelopmentisencouraged.1.3Thistestmethodwillnot,ingeneral,permitconclusionstobedrawnconcerningtherelativearcresistancerankingsofmaterialsthatmaybesubjectedtoothertypesofarcs:forexample,highvoltageathighcurrents,andlowvoltageatloworhighcurrents(promotedbysurgesorbyconductingcontaminants).1.4Thetestmethodisintended,becauseofitsconvenienceandtheshorttimerequiredfortesting,forpreliminaryscreeningofmaterial,fordetectingtheeffectsofchangesinformulation,andforqualitycontroltestingaftercorrelationhasbeenestablishedwithothertypesofsimulatedservicearctestsandfieldexperience.Becausethistestmethodisusuallyconductedundercleananddrylaboratoryconditionsrarelyencounteredinpractice,thepredictionofamaterial''srelativeperformanceintypicalapplicationsandinvarying"cleantodirty"environmentsmaybesubstantiallyaltered(Note0).Cautionisurgedagainstdrawingstrongconclusionswithoutcorroboratingsupportofsimulatedservicetestsandfieldtesting.Rather,thistestmethodisusefulforpreliminaryevaluationofchangesinstructureandcompositionwithoutthecomplicatinginfluenceofenvironmentalconditions,especiallydirtandmoisture.Bychangingsomeofthecircuitconditionsdescribedhereinithasbeenfoundpossibletorearrangemarkedlytheorderofarcresistanceofagroupoforganicinsulatingmaterialsconsistingofvulcanizedfiberandofmoldedphenolicandaminoplastics,somecontainingorganic,andsomeinorganic,filler.1.5Whilethistestmethodusesdry,uncontaminatedspecimensurfaces,TestMethodD2132,TestMethodsD2303,andTestMethodD3638employwet,contaminatedspecimensurfaces.Theiruseisrecommendedforengineeringpurposesandtoassistinestablishingsomedegreeofsignificancetothistestmethodforqualitycontrolpurposes.1.6Thistestmethodisnotapplicabletomaterialsthatdonotproduceconductivepathsundertheactionofanelectricarc,orthatmeltorformfluidresiduesthatfloatconductiveresiduesoutoftheactivetestareatherebypreventingformationofaconductivepath.1.7Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,see,,Section,and.
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:10P.;A4
【正文语种】: