Designation:D3955−13StandardSpecificationforElectricalInsulatingVarnishes1ThisstandardisissuedunderthefixeddesignationD3955;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversthetestsandvaluesforelec-tricalinsulatingvarnishes,assupplied,whicharesuitablefortheimpregnationandtreatmentofelectricalcoilsandwindingsappliedbydipprocess.1.2Varnishes,flexibleorrigid,includedinthisspecificationare:GradeDA—Air-dryGradeDO—Organicsolventcontaining,baking,GradeDM—Reactivediluentcontaining,GradeDS—Silicone,GradeDW—Watercontaining,andGradeDT—Thixotropic.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.NOTE1—ThisspecificationresemblesIEC60455intitleonly.Thecontentissignificantlydifferent.2.ReferencedDocuments2.1ASTMStandards:2D93TestMethodsforFlashPointbyPensky-MartensClosedCupTesterD115TestMethodsforTestingSolventContainingVar-nishesUsedforElectricalInsulationD1711TerminologyRelatingtoElectricalInsulationD2519TestMethodforBondStrengthofElectricalInsulat-ingVarnishesbytheHelicalCoilTestD3056TestMethodforGelTimeofSolventlessVarnishesD3145TestMethodforThermalEnduranceofElectricalInsulatingVarnishesbytheHelicalCoilMethodD3251TestMethodforThermalEnduranceCharacteristicsofElectricalInsulatingVarnishesAppliedOverFilm-InsulatedMagnetWireD3278TestMethodsforFlashPointofLiquidsbySmallScaleClosed-CupApparatusD4733TestMethodsforSolventlessElectricalInsulatingVarnishesD4880TestMethodforSaltWaterProofnessofInsulatingVarnishesOverEnamelledMagnetWireD5637TestMethodforMoistureResistanceofElectricalInsulatingVarnishesD5638TestMethodforChemicalResistanceofElectricalInsulatingVarnishes2.2MilitarySpecifications:3MIL-PRF-1767...
