Designation:D1830−99(Reapproved2012)StandardTestMethodforThermalEnduranceofFlexibleSheetMaterialsUsedforElectricalInsulationbytheCurvedElectrodeMethod1ThisstandardisissuedunderthefixeddesignationD1830;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodprovidesaprocedureforevaluatingthermalenduranceofflexiblesheetmaterialsbydeterminingdielectricbreakdownvoltageatroomtemperatureafteraginginairatselectedelevatedtemperatures.Thermalenduranceisexpressedintermsofatemperatureindex.1.2Thistestmethodisapplicabletosuchsolidelectricalinsulatingmaterialsascoatedfabrics,dielectricfilms,compos-itelaminates,andothermaterialswhereretentionofflexibilityafterheatagingisofmajorimportance(seeNote4).1.3Thistestmethodisnotintendedfortheevaluationofrigidlaminatematerialsnorforthedeterminationofthermalenduranceofthosematerialswhicharenotexpectedorrequiredtoretainflexibilityinactualservice.1.4Thevaluesstatedinacceptablemetricunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,see10.1.2.ReferencedDocuments2.1ASTMStandards:2D149TestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsatCommercialPowerFrequenciesD374TestMethodsforThicknessofSolidElectricalInsu-lation(Withdrawn2013)3D5423SpecificationforForced-ConvectionLaboratoryOv-ensforEvaluationofElectricalInsulation2.2InstituteofElectricalandElectronicsEngineersPubli-cations:4IEEENo.1GeneralPrinciplesforTempera...
