Designation:D3386–00AnAmericanNationalStandardStandardTestMethodforCoefficientofLinearThermalExpansionofElectricalInsulatingMaterials1ThisstandardisissuedunderthefixeddesignationD3386;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoversdeterminationofthecoefficientoflinearthermalexpansionofelectricalinsulatingmaterialsbyuseofathermomechanicalanalyzer.1.2Thistestmethodisapplicabletomaterialsthataresolidovertheentirerangeoftemperatureused,andthatretainsufficienthardnessandrigidityoverthetemperaturerangesothatirreversibleindentationofthespecimenbythesensingprobedoesnotoccur.1.3Transitiontemperaturesalsomaybeobtainedbythistestmethod.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5ThevaluesstatedinSIunitsarethestandard.NOTE1—ThereisnosimilarorequivalentISO/IECstandard.2.ReferencedDocuments2.1ASTMStandards:D374MTestMethodsforThicknessofSolidElectricalInsulation(Metric)2D696TestMethodforCoefficientofLinearThermalEx-pansionofPlasticsBetween−30°Cand30°C3D1711TerminologyRelatingtoElectricalInsulation2D6054PracticeforCoordinatingElectricalInsulatingMa-terialsforTesting43.Terminology3.1SeeTerminologyD1711fordefinitionsofothertermsrelatingtoelectricalinsulation.4.SummaryofTestMethod4.1Thistestmethodusesathermomechanicalanalyzertodeterminethechangeofdimensionasafunctionoftempera-tureofasmallspecimenofasolidelectricalinsulatingmaterial.Coefficientsoflinearthermalexpansionarecalcu-latedfromthevalues.Otherthermalobservationsmayalsobemade.5.SignificanceandUse5.1Measurementsofcoefficient...
