【英文标准名称】:StandardTestMethodfortheDeterminationofGassingCharacteristicsofInsulatingLiquidsUnderThermalStressatLowTemperature
【原文标准名称】:测定低温热应力下绝缘液体放气特性的标准试验方法
【标准号】:ASTMD7150-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D27.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:低温;试验;流体;温度;绝缘液体;测定;热应力;绝缘
【英文主题词】:combustiblegases;DGA;dissolvedgases;dissolvedgas-in-oil;insulatingoil;lowtemperaturegassingcharacteristics;straygassing;transformeroil,claytreatment
【摘要】:Generationofcombustiblegasesisusedtodeterminetheconditionofoil-filledelectricalapparatus.ManyyearsofempiricalevidencehasyieldedguidelinessuchasthosegiveninIEEEC57.104,IEC60599andIEC61464.Industryexperiencehasshownthatelectricandthermalfaultedinoil-filledelectricalapparatusaretheusualsourcesthatgenerategases.Experiencehasshownthatsomeofthegasescouldformintheoilatlowtemperaturesorasaresultofcontamination,withoutanyotherinfluences.Someseverelyhydro-treatedtransformeroilssubjectedtothermalstressandoilsthatcontaincertaintypesofcontaminationmayproducespecificgasesatlowertemperaturesthannormallyexpectedfortheirgenerationandhence,falselyindicateabnormaloperationoftheelectricalapparatus.Somenewoilshaveproducedlargeamountsofgases,especiallyhydrogen,withouttheinfluenceofotherelectricalapparatusmaterialsorelectricalstresses.Thisrendersinterpretationofthedissolvedgasanalysismorecomplicated.Heatingfor164hhasbeenfoundtobeasufficientamountoftimetoreachastableandcharacteristicgassingpattern.Thismethodusesbothdryairanddrynitrogenasthesparginggas.Thisistoreflecteitheraelectricalapparatuspreservationsystemthatallowsoxygentocontacttheoiloronethatissealedfromtheoutsideatmosphere.Oilsspargedwithairgenerallyproducemuchmorehydrogenasapercentageofthetotalcombustiblegascontentascomparedtooilsspargedwithnitrogenastheseproducemorehydrocarbonsinrelationtohydrogen.1.1Thistestmethoddescribestheprocedurestodeterminethelowtemperature(120C)gassingcharacteristicsofinsulatingliquidsspecificallyandwithouttheinfluenceofotherelectricalapparatusmaterialsorelectricalstresses.Thistestmethodwasprimarilydesignedforinsulatingmineraloil.Itcanbeappliedtootherinsulatingliquidsinwhichdissolvedgas-in-oilanalysis(TestMethodD3612)iscommonlyperformed.1.2Thistestmethodisparticularlysuitedfordetectionofthephenomenonsometimesknownas"straygassing"andisalsoreferredtoinCIGRETF11B39.1.3Thistestmethodisperformedontransformerinsulatingliquidstodeterminethepropensityoftheoiltoproducecertaingasessuchashydrogenandhydrocarbonsatlowtemperatures.1.4Thistestmethoddetailstwoprocedures:1.5MethodAdescribestheprocedurefordeterminingthegassingcharacteristicsofanew,unusedinsulatingliquid,asreceived,at120Cfor164h.1.6MethodBdescribestheprocedureforprocessingtheinsulatingliquidthroughanattapulgiteclaycolumntoremoveorganiccontaminantsandotherreactivegroupsthatmayinfluencethegassingbehaviorofaninsulatingliquid,whichissuspectedofbeingcontaminated.Thisprocedureappliestobothnewandusedinsulatingliquids.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E38
【国际标准分类号】:29_040_01
【页数】:4P.;A4
【正文语种】: