ASTM D149-09

ASTM D149-09

ASTM D149-09

Designation:D149–09

AnAmericanNationalStandard

StandardTestMethodfor

DielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsatCommercialPowerFrequencies1

Thisstandardisissuedunderthe xeddesignationD149;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.Scope*

1.1Thistestmethodcoversproceduresforthedetermina-tionofdielectricstrengthofsolidinsulatingmaterialsatcommercialpowerfrequencies,underspeci edconditions.2,31.2Unlessotherwisespeci ed,thetestsshallbemadeat60Hz.However,thistestmethodissuitableforuseatanyfrequencyfrom25to800Hz.Atfrequenciesabove800Hz,dielectricheatingisapotentialproblem.

1.3ThistestmethodisintendedtobeusedinconjunctionwithanyASTMstandardorotherdocumentthatreferstothistestmethod.Referencestothisdocumentneedtospecifytheparticularoptionstobeused(see5.5).

1.4Itissuitableforuseatvarioustemperatures,andinanysuitablegaseousorliquidsurroundingmedium.

1.5Thistestmethodisnotintendedformeasuringthedielectricstrengthofmaterialsthatare uidunderthecondi-tionsoftest.

1.6Thistestmethodisnotintendedforuseindeterminingintrinsicdielectricstrength,direct-voltagedielectricstrength,orthermalfailureunderelectricalstress(seeTestMethodD3151).

1.7Thistestmethodismostcommonlyusedtodeterminethedielectricbreakdownvoltagethroughthethicknessofatestspecimen(puncture).Itisalsosuitableforusetodeterminedielectricbreakdownvoltagealongtheinterfacebetweenasolidspecimenandagaseousorliquidsurroundingmedium( ashover).WiththeadditionofinstructionsmodifyingSec-tion12,thistestmethodisalsosuitableforuseforprooftesting.

ThistestmethodisunderthejurisdictionofASTMCommitteeD09onElectricalandElectronicInsulatingMaterialsandisthedirectresponsibilityofSubcommitteeD09.12onElectricalTests.

CurrenteditionapprovedOct.1,http://www.51wendang.comstpreviouseditionapprovedin2004asD149–97a(2004).DOI:10.1520/D0149-09.2

Bartnikas,R.,Chapter3,“HighVoltageMeasurements,”ElectricalProper-tiesofSolidInsulatingMaterials,MeasurementTechniques,Vol.IIB,EngineeringDielectrics,R.Bartnikas,Editor,ASTMSTP926,ASTM,Philadelphia,1987.3

Nelson,J.K.,Chapter5,“DielectricBreakdownofSolids,”ElectricalPropertiesofSolidInsulatingMaterials:MolecularStructureandElectricalBehavior,Vol.IIA,EngineeringDielectrics,R.BartnikasandR.M.Eichorn,Editors,ASTMSTP783,ASTM,Philadelphia,1983

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1.8ThistestmethodissimilartoIECPublication243-1.AllproceduresinthismethodareincludedinIEC243-1.Differ-encesbetweenthismethodandIEC243-1arelargelyeditorial.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Speci chazardstatementsaregiveninSection7.Alsosee6.4.1.

2.ReferencedDocuments2.1ASTMStandards:4

D374TestMethodsforThicknessofSolidElectricalInsu-lation

D618PracticeforConditioningPlasticsforTesting

D877TestMethodforDielectricBreakdownVoltageofInsulatingLiquidsUsingDiskElectrodes

D1711TerminologyRelatingtoElectricalInsulation

D2413PracticeforPreparationofInsulatingPaperandBoardImpregnatedwithaLiquidDielectric

D3151TestMethodforThermalFailureofSolidElectricalInsulatingMaterialsUnderElectricStress5

D3487Speci cationforMineralInsulatingOilUsedinElectricalApparatus

D5423Speci cationforForced-ConvectionLaboratoryOvensforEvaluationofElectricalInsulation2.2IECStandard:

Pub.243-1MethodsofTestforElectricalStrengthofSolidInsulatingMaterials—Part1:TestsatPowerFrequencies6

ForreferencedASTMstandards,visittheASTMwebsite,http://www.51wendang.com,orcontactASTMCustomerServiceatservice@http://www.51wendang.com.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.5

http://www.51wendang.com.6

AvailablefromInternationalElectrotechnicalCommission(IEC),3ruedeVarembé,Casepostale131,CH-1211,Geneva20,Switzerland,http://www.iec.ch.

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*ASummaryofChangessectionappearsattheendofthisstandard.

Copyright.(C)ASTMInternational.100BarrHarbourDr.P.O.BoxC-700WestConshohocken,Pennsylvania19428-2959,UnitedStates

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