ASTM D2300-2008 在电应力和电离作用下绝缘液体放气的标准试验方法(改进的皮勒里法)

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【英文标准名称】:StandardTestMethodforGassingofElectricalInsulatingLiquidsUnderElectricalStressandIonization(ModifiedPirelliMethod)
【原文标准名称】:在电应力和电离作用下绝缘液体放气的标准试验方法(改进的皮勒里法)
【标准号】:ASTMD2300-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D27.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:gasabsorbing;gasevolving;gassing;insulatingliquids;insulatingoils;ionization;Pirellimethod;Electricalinsulatingoils;Gasabsorption;Gasevolution/absorption;ModifiedPirellimethod;Pirellimethod
【摘要】:Forcertainapplicationswheninsulatingliquidisstressedathighvoltagegradients,itisdesirabletobeabletodeterminetherateofgasevolutionorgasabsorptionunderspecifiedtestconditions.Atpresenttimecorrelationofsuchtestresultswithequipmentperformanceislimited.Inthistestmethod,hydrogen(alongwithlowmolecularweighthydrocarbons)isgeneratedbyionicbombardmentofsomeinsulatingliquidmoleculesandabsorbedbychemicalreactionwithotherinsulatingliquidmolecules.Thevaluereportedistheneteffectofthesetwocompetingreactions.Thearomaticmoleculesorunsaturatedportionsofmoleculespresentininsulatingliquidsarelargelyresponsibleforthehydrogen-absorbingreactions.Bothmoleculetype,aswellasconcentration,affectsthegassingtendencyresult.Saturatedmoleculestendtobegasevolving.Therelationbetweenaromaticityandquantityofunsaturatesoftheinsulatingliquidandgassingtendencyisanindirectoneandcannotbeusedforaquantitativeassessmentofeitherintheinsulatingliquid.Thistestmethodmeasuresthetendencyofinsulatingliquidstoabsorborevolvegasunderconditionsofelectricalstressandionizationbasedonthereactionwithhydrogen,thepredominantgasinthepartialdischarge.Forthetestconditions,theactivatinggashydrogen,incontrasttoothergases,forexample,nitrogen,enhancesthediscriminationofdifferencesintheabsorption-evolutionpatternsexhibitedbytheinsulatingliquids.Insulatingliquidsshowntohavegas-absorbing(H2)characteristicsinthetesthavebeenusedtoadvantageinreducingequipmentfailures,particularlycablesandcapacitors.However,theadvantageofsuchinsulatingliquidsintransformersisnotwelldefinedandtherehasbeennoquantitativerelationshipestablishedbetweenthegassingtendencyasindicatedbythistestmethodandtheoperatingperformanceoftheequipment.Thistestmethodisnotconcernedwithbubbleevolution,whichmayarisefromphysicalprocessesassociatedwithsuper-saturationofgasesinoilorwatervaporbubblesevolvingfromwetinsulation.1.1Thistestmethodmeasurestherateatwhichgasisevolvedorabsorbedbyinsulatingliquidswhensubjectedtoelectricalstressofsufficientintensitytocauseionizationincellshavingspecificgeometries.1.2Thistestmethodisnotconcernedwithbubblesarisingfromsupersaturationoftheinsulatingliquid.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityofwhoeverusesthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautionssee5.1.4and8.4.
【中国标准分类号】:K15
【国际标准分类号】:29_040_10
【页数】:5P.;A4
【正文语种】:英语