Designation:D1932−13StandardTestMethodforThermalEnduranceofFlexibleElectricalInsulatingVarnishes1ThisstandardisissuedunderthefixeddesignationD1932;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-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.2.ReferencedDocuments2.1ASTMStandards:2D149TestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsatCommercialPowerFrequenciesD374TestMethodsforThicknessofSolidElectricalInsu-lation(Withdrawn2013)3D580SpecificationforGreigeWovenGlassTapesandWebbingsD1346TestMethodforTestingElectricalInsul...
