ISO 1628-2-1988 塑料.粘度数和特性粘度数的测定.第2部分:聚(氯乙烯)树脂
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【英文标准名称】:Plastics;determinationofviscositynumberandlimitingviscositynumber;part2:poly(vinylchloride)resins
【原文标准名称】:塑料.粘度数和特性粘度数的测定.第2部分:聚(氯乙烯)树脂
【标准号】:ISO1628-2-1988
【标准状态】:作废
【国别】:国际
【发布日期】:1988-12
【实施或试行日期】:1988-12-15
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:树脂;聚氯乙烯;试验;试验;高聚物;塑料;粘度;稀释;测定
【英文主题词】:viscosity;determination;testing;resins;dilution;plastics;tests;polyvinylchloride;polymers
【摘要】:
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:2P;A4
【正文语种】:英语
基本信息
| 标准名称： | 电动呼吸机 |
| 中标分类： |
医药、卫生、劳动保护 >>
医疗器械 >>
手术室设备 |
| 替代情况： | 调整为YY 91041-1999 |
| 发布日期： | |
| 实施日期： | 1990-07-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 11页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 医药 卫生 劳动保护 医疗器械 手术室设备
【英文标准名称】:StandardTestMethodforProof-VoltageTestingofThinSolidElectricalInsulatingMaterials
【原文标准名称】:薄固体电绝缘材料的耐电压测试用标准试验方法
【标准号】:ASTMD1389-2007
【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】:电缆;电介质测量;电气工程;电绝缘材料;电气绝缘;电气测试;绝缘件;测试;金属线
【英文主题词】:proof-voltagetesting;thinsolidinsulatingmaterials
【摘要】:Occasionaldielectricdefectsmaybefoundincommerciallyavailableandacceptablethinelectricinsulatingmaterials.Moreoftenthannot,thesematerialsareusedinmultiplelayers.Theprobabilitythatoccasionaldielectricweakspotswillcoincidefromlayertolayerisverysmallbutincreaseswiththefrequencyofoccurrenceofthesedefects.Theproof-voltagetestservestoindicatethefrequencyofoccurrenceofdielectricdefectsandfacilitatestheisolationofareaswherethedefectsareexcessive.Someusesofthinelectricalinsulatingmaterialsrequirethecompleteabsenceofanydielectricdefects.Theproof-voltagetestservestolocatedielectricdefects,makingpossiblerepairorreplacementoftheareainvolvedasmaybedesirable.Intheabsenceofdetectedfaults,thistestmethodisnondestructivetothematerialbeingevaluated,exceptasdiscussedin1.2and4.3.Acriticalpartoftheapparatusandprocedureisthesensitivityandspeedofresponseofthefaultdetectiondevice.Thelatterisusuallyacircuitbreaker.Dependinguponthecharacteristicsofthislattercomponent,itisverylikelythattheresultsobtainedusingdifferentsetsofapparatuswillexhibitsignificantvariability.Itisessentialthatthefaultdetectorrespondonlytofaultcurrentsandthatfaultcurrentsaboveapre-definedvaluealwaysresultinafaultdetectorresponse.Thedesign,adjustment,andoperationoftheapparatusmustavoidbotherroneousfunctioningandanyerroneousnonfunctioningofthefaultdetectorthatmightbetheresultofchargingcurrents,imbalanceofimpedance,orcomponentmalfunction.Theproof-voltagetesthasbeenusedasamanufacturingcontroltestandasanacceptancetesttoguaranteeaminimumlevelofdielectricdefects.Ifthistestmethodisusedasanacceptancetest,takecarethatthefactorsdiscussedin5.4and5.5havebeenconsidered,andifmorethanonesetofapparatusistobeused,thatcomparableresultsareobtainedfromthem.1.1Thistestmethodcoversageneralprocedureforproof-voltagetestingofthinsolidelectricalinsulatingmaterialsatcommercialpowerfrequencies.Itisintendedtoapplyprincipallytoflatmaterialsbutisapplicable,withmodification,toanyformthatpermitscontinuouslypassingthematerialbetweensuitableelectrodes.,1.2Onextremelythinmaterials(usuallylessthan0.05mm(0.002in.)),thetestresultsmaybeinfluencedmorebymechanicaldamagecausedbyconditionsoftestthanbydielectricdefects.Consequently,thistestmethodisnotrecommendedforusewithextremelythinmaterials,unlesspriordeterminationhasestablishedthatthetestresultsarenotinfluencedbymechanicaldamage.1.3Whiletheequipmentandproceduresdescribedinthistestmethodrelatespecificallytotestsmadewithpowerfrequencyacvoltages,similarequipmentandproceduresareusedforproof-voltagetestsusingdcvoltages.Totheextentthatitappliestodctests,thistestmethodcanserveasaguideforpersonsmakingsuchtests.However,onlytestsmadewithpowerfrequencyacvoltagescanbesaidtobeinaccordancewiththistestmethod.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.
【中国标准分类号】:K15
【国际标准分类号】:29_035_20
【页数】:4P.;A4
【正文语种】:
