Designation:D1932−19StandardTestMethodforThermalEnduranceofFlexibleElectricalInsulatingVarnishes1ThisstandardisissuedunderthefixeddesignationD1932;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationoftherelativethermalenduranceofflexibleelectricalinsulatingvarnishesbydeterminingthetimenecessaryatelevatedtemperaturestodecreasethedielectricbreakdownofthevarnishtoanarbi-trarilyselectedvaluewhenappliedtoastandardglassfiberfabric.1.2Thistestmethoddoesnotapplytovarnishesthatloseahighpercentageoftheirdielectricbreakdownvoltagewhenflexedbeforeelevatedtemperatureexposureasprescribedinthescreeningtest(Section9).Examplesofsuchvarnishesarethoseusedforhighspeedarmaturesandlaminatedstructures.Also,thistestmethodisnotapplicabletovarnisheswhichdistortsufficientlyduringthermalelevatedtemperatureexpo-suresothattheycannotbetestedusingthecurvedelectrodeassembly.1.3Thermalenduranceisexpressedintermsofatempera-tureindex.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.NOTE1—ThereisnoequivalentIECorISOstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMSt...
