ASTM D257-2007 绝缘材料直流电阻或电导率的标准试验方法

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【英文标准名称】:StandardTestMethodsforDCResistanceorConductanceofInsulatingMaterials
【原文标准名称】:绝缘材料直流电阻或电导率的标准试验方法
【标准号】:ASTMD257-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:电导率;电气工程;电绝缘;电气测试;绝缘;塑料;耐力;电阻器;测试
【英文主题词】:DCresistance;insulationresistance;surfaceresistance;surfaceresistivity;volumeresistance;volumeresistivity
【摘要】:1.1Thesetestmethodscoverdirect-currentproceduresforthemeasurementofdcinsulationresistance,volumeresistance,andsurfaceresistance.Fromsuchmeasurementsandthegeometricdimensionsofspecimenandelectrodes,bothvolumeandsurfaceresistivityofelectricalinsulatingmaterialscanbecalculated,aswellasthecorrespondingconductancesandconductivities.1.2Thesetestmethodsarenotsuitableforuseinmeasuringtheelectricalresistance/conductanceofmoderatelyconductivematerials.UseTestMethodD4496toevaluatesuchmaterials.1.3Thisstandarddescribesseveralgeneralalternativemethodologiesformeasuringresistance(orconductance).SpecificmaterialscanbetestedmostappropriatelybyusingstandardASTMtestmethodsapplicabletothespecificmaterialthatdefinebothvoltagestresslimitsandfiniteelectrificationtimesaswellasspecimenconfigurationandelectrodegeometry.Theseindividualspecifictestmethodologieswouldbebetterabletodefinetheprecisionandbiasforthedetermination.1.4Theproceduresappearinthefollowingsections:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:18P.;A4
【正文语种】: