Designation:D2275−14StandardTestMethodforVoltageEnduranceofSolidElectricalInsulatingMaterialsSubjectedtoPartialDischarges(Corona)ontheSurface1ThisstandardisissuedunderthefixeddesignationD2275;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddeterminesthevoltageenduranceofsolidelectricalinsulatingmaterialsforuseatcommercialpowerfrequenciesundertheactionofcorona(seeNote1).Thistestmethodismoremeaningfulforratingmaterialswithrespecttotheirresistancetoprolongedacstressundercoronaconditionsforcomparativeevaluationbetweenmaterials.NOTE1—Theterm“corona”isusedalmostexclusivelyinthistestmethodinsteadof“partialdischarge,”becauseitisavisibleglowattheedgeoftheelectrodeinterfacethatistheresultofpartialdischarge.Corona,asdefinedinTerminologyD1711,is“visiblepartialdischargesingasesadjacenttoaconductor.”1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.2.ReferencedDocuments2.1ASTMStandards:2D149TestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsatCommercialPowerFrequenciesD618PracticeforConditioningPlasticsforTestingD1711TerminologyRelatingtoElectricalInsulationD1868TestMethodforDetectionandMeasurementofPartialDischarge(Corona)PulsesinEvaluationofInsu-lationSystemsD3382TestMethodsforMeasurementofEnergyandInte-gratedChargeTransferDuetoPartialDischarges(Co-rona)UsingBridgeTechniques2.2SpecialT...
