Designation:D5637−05(Reapproved2017)StandardTestMethodforMoistureResistanceofElectricalInsulatingVarnishes1ThisstandardisissuedunderthefixeddesignationD5637;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemechanicalperformanceofelectricalinsulatingvarnishessubjectedtohighhumidityconditions.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.See7.1.NOTE1—ThereisnotISOorIECequivalent.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D2519TestMethodforBondStrengthofElectricalInsulat-ingVarnishesbytheHelicalCoilTest2.2IEEEStandard:IEEE117StandardTestProcedureforEvaluationofSys-temsofInsulatingMaterialsforRandon-WoundACElec-tricMachinery33.Terminology3.1SeeTestMethodD2519.4.SummaryofTestMethod4.1Flexuralstrengthtestsaremadeonvarnish-treatedhelicalcoilstodeterminetheforcerequiredtobreakthecoilunderspecifiedconditionsbothbeforeandafterexposuretohighhumidityconditions.5.SignificanceandUse5.1Thistestmethodisusefulfortheevaluationofinsulat-ingvarnishperformanceinhighhumidityexposure.6.Apparatus6.1TensileTestingMachine—SeeTestMethodD2519.6.2TestFixture—SeeTestMethodD2519.6.3ExposureChamber—Achambercapableofmaintainingaminimumof100%relativehumiditywithcondensation,at3061°C.NOTE2—TheexposurechamberdescribedinI...
