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ASTM D3755-1997(2004) 在直流电压作用下固体电绝缘材料的介电击穿电压及介电强度的标准试验方法

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【英文标准名称】:StandardTestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsUnderDirect-VoltageStress
【原文标准名称】:在直流电压作用下固体电绝缘材料的介电击穿电压及介电强度的标准试验方法
【标准号】:ASTMD3755-1997(2004)
【标准状态】:现行
【国别】:
【发布日期】:1997
【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】:电气工程;介电强度;试验;电气试验;绝缘;电介质击穿;固体;电绝缘
【英文主题词】:conditioning;creepage;criteriaofbreakdown;dielectricbreakdownvoltage;dielectricstrength;directvoltage;directvoltagestress;electrodes;flashover;rupture;solidinsulatingmaterials;surroundingmedium;voltagecontrol;voltmeter
【摘要】:Thistestmethodisintendedforuseasacontrolandacceptancetestfordirect-voltageapplications.Itmaybeusedalsointhepartialevaluationofmaterialforspecificendusesandasameansfordetectingchangesinmaterialduetospecificdeterioratingcauses.Experienceindicatesthatthebreakdownvalueobtainedwithdirectvoltageusuallywillbeapproximately2to4timesthermsvalueofthe60-Hzalternating-voltagebreakdown.Foranonhomogeneoustestspecimen,thedistributionofvoltagestresswithinthespecimenisdeterminedbyimpedance(largelycapacitive)withalternatingvoltage.Withanincreasingdirectvoltage,thevoltagedistributionmaybestilllargelycapacitive,butdependspartlyontherateofvoltageincrease.Aftersteadyapplicationofdirectvoltagethevoltagedivisionacrossthetestspecimenisdeterminedbyresistance.Thechoiceofdirectoralternatingvoltagedependsuponthepurposeforwhichthebreakdowntestistobeused,andtosomeextent,ontheintendedapplicationofthematerial.AmorecompletediscussionofthesignificanceofdielectricbreakdowntestsisgiveninAppendixX1ofthismethodandofTestMethodD149.ThoseappendixsectionsofTestMethodD149thatrefertoalternatingvoltagearenotapplicabletothedirect-voltagemethod.1.1Thistestmethodcoversthedeterminationofdielectricbreakdownvoltageanddielectricstrengthofsolidelectricalinsulatingmaterialsunderdirect-voltagestress.1.2Sincesomematerialsrequirespecialtreatment,referenceshouldalsobemadetoASTMspecificationsortothetestmethoddirectlyapplicabletothematerialtobetested.SeeTestMethodD149forthedeterminationofdielectricstrengthofelectricalinsulatingmaterialsatcommercialpowerfrequencies.1.3ThistestmethodissimilartoIECPublication243-2.AllproceduresinthistestmethodareincludedinIEC243-2.DifferencesbetweenthistestmethodandIEC243-2arelargelyeditorial.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionstatementsaregiveninSection7.
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:6P.;A4
【正文语种】:


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MIL-STD-100G, DEPARTMENT OF DEFENSE STANDARD PRACTICE FOR ENGINEERING DRAWINGS (9 JUN 1997) [S/S BY ASME-Y14.100, ASME-Y14.24, ASME-Y14.35M & ASME-14.34M]., This standard, along with ASME Y14.100M, establishes the essential requirements and reference documents applicable to the preparation and revision of engineering drawings and associated lists for or by Departments and Agencies of the Department of Defense. ASME Y14.100M is the preferred requirements document for engineering drawing practices. This standard should only be used in lieu of ASME Y14.100M where the necessity for a DoD design activity is fully justified and Government logistics support is required . See 6.2.2.【英文标准名称】:VentilationforAcceptableIndoorAirQuality
【原文标准名称】:达标的室内空气质量用通风设备
【标准号】:ANSI/ASHRAEAddendum62.1d-2011
【标准状态】:现行
【国别】:美国
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Airconditioninginstallations;Airquality;Indoors;Thermalenvironmentsystems;Ventilation;Ventilationsystems
【摘要】:
【中国标准分类号】:Q76
【国际标准分类号】:91_140_30
【页数】:
【正文语种】:英语