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【英文标准名称】:StandardPracticeforCombustibleGasesintheGasSpaceofElectricalApparatusUsingPortableMeters
【原文标准名称】:用便携式仪表测定电气装置气体空间中可燃性气体的标准试验方法
【标准号】:ASTMD3284-2005
【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】:(Practice)
【标准水平】:()
【中文主题词】:电绝缘;电气工程;电气保护设备;电气器具;试验;气体燃料
【英文主题词】:combustiblegases;gasspace;gases;portablemeters
【摘要】:Arcing,partialdischarge,andlocalizedoverheatingintheinsulationsystemoftransformersresultinchemicaldecompositionoftheinsulatingoilandotherinsulatingmaterials.Thismaygeneratevariousgases,someofwhicharecombustible.Typically,gasesaregeneratedintheoilandthenpartitionedintothegasspaceaccordingtotheirindividualsolubilities.Gaseswhicharehighlyoil-soluble,suchasacetylene,maynotbeinsignificantquantitiesinthegasspaceuntilanincipientfaulthasprogressedtoaveryseriousconditionorfailureofthetransformer.Gasessuchascarbonmonoxideandhydrogenwhichhavelowsolubilitiesinoilcanmakeupalargefractionofthecombustiblegasesinthegasspace.Detectionofthesegasesisfrequentlythefirstavailableindicationofamalfunction.Portablecombustiblegasmetersareaconvenientmeansofdetectingthepresenceofgeneratedgases.Normaloperationofatransformermayresultintheformationofsomecombustiblegases.Thedetectionofanincipientfaultbythismethodinvolvesanevaluationoftheamountofcombustiblegasespresent,therateofgenerationofthesegases,andtheirrateofescapefromthetransformer.RefertoIEEEC57.104fordetailedinformationoninterpretationofgassingintransformers.1.1Thisfieldpracticecoversthedetectionandestimationofcombustiblegasesinthegasblanketabovetheoiloringasdetectorrelaysintransformersusingportableinstruments.Itisapplicableonlywithtransformersusingmineraloilasthedielectricfluid.Gasesdissolvedintheoilandnoncombustiblegasesarenotdetermined.Amethodofcalibratingtheinstrumentswithaknowngasmixtureisincluded.1.2Thispracticeaffordsasemi-quantitativeestimateofthetotalcombustiblegasespresentinagasmixture.Ifamoreaccuratedeterminationofthetotalamountofcombustiblegasesoraquantitativedeterminationoftheindividualcomponentsisdesired,usealaboratoryanalyticalmethod,suchasTestMethodD3612.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection7.
【中国标准分类号】:C80
【国际标准分类号】:13_320
【页数】:3P.;A4
【正文语种】: