Designation:D4652−20StandardSpecificationforSiliconeLiquidUsedforElectricalInsulation1ThisstandardisissuedunderthefixeddesignationD4652;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverssiliconeliquidforuseintransformers,capacitors,andelectronicassembliesasaninsu-latingorcoolingmedium,orboth.1.2Siliconeliquidcoveredbythisspecificationispolydim-ethylsiloxanehavinganominalviscosityof50mm2/sat25°Candafirepointof340°Corgreater.Thisspecificationappliesonlytonewsiliconeliquid.Informationonin-servicemainte-nancetestingisavailableinappropriateguides.21.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D92TestMethodforFlashandFirePointsbyClevelandOpenCupTesterD97TestMethodforPourPointofPetroleumProductsD445TestMethodforKinematicViscosityofTransparentandOpaqueLiquids(andCalculationofDynamicViscos-ity)D664TestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitrationD877TestMethodforDielectricBreakdownVoltageofInsulatingLiquidsUsingDiskElectrodesD923PracticesforSamplingElectricalInsulatingLiquidsD924TestMethodforDissipationFactor(orPowerFactor)andRelativePermittivity(DielectricConstant)ofElectri-calInsulatingLiquidsD974TestMethodforAcidandBaseNumberbyColor-IndicatorTitrationD1169TestMethodforSpecificResistance(Resistivity)ofElectricalInsulatingLiquidsD1298TestMethodforDensity,RelativeDensity,orAPIGravityofCrudePetroleumandLiquidPetroleumProd-uctsbyHydrometerMeth...
