Designation:D5374−13StandardTestMethodsforForced-ConvectionLaboratoryOvensforEvaluationofElectricalInsulation1ThisstandardisissuedunderthefixeddesignationD5374;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverproceduresforevaluatingthecharacteristicsofforced-convectionventilatedelectrically-heatedovens,operatingoverallorpartofthetemperaturerangefrom20°Cabovetheambienttemperatureto500°Candusedforthermalenduranceevaluationofelectricalinsulatingmaterials.1.2ThesetestmethodsarebasedonIECPublication216-4-1,andaretechnicallyidenticaltoit.Thiscompilationoftestmethodsandanassociatedspecification,D5423,havereplacedSpecificationD2436.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D2436SpecificationforForced-ConvectionLaboratoryOv-ensforElectricalInsulation(Withdrawn1994)3D5423SpecificationforForced-ConvectionLaboratoryOv-ensforEvaluationofElectricalInsulation2.2OtherDocument:IECPublication216-4-1GuidefortheDeterminationofThermalEndurancePropertiesofElectricalInsulatingMaterials,Part4—AgingOvens,Section1—Single-ChamberOvens43.Terminology3.1RefertotheterminologysectionofSpecificationD5423.4.SignificanceandUse4.1Ovensusedforthermalevaluationofinsulatingmateri-alsaretobecapableofmaintaininguniformconditionsoftemperatureandaircirculationovertheextendedperiodsoftimethatarerequiredforconductingthesetests.SpecificationD5423specifiesthepermissibledeviationsfromabsoluteuniformitythathavebeengenerallyacceptedinternationallyfortheseovens.Thesetestmethodsincludeproceduresformeasuringthesedeviationsandotherspecifiedch...
