Designation:D1816−12StandardTestMethodforDielectricBreakdownVoltageofInsulatingLiquidsUsingVDEElectrodes1ThisstandardisissuedunderthefixeddesignationD1816;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthedielec-tricbreakdownvoltageofinsulatingliquids(oilsofpetroleumorigin,siliconefluids,highfire-pointmineralelectricalinsu-latingoils,syntheticesterfluidsandnaturalesterfluids).Thistestmethodisapplicabletoinsulatingliquidscommonlyusedincables,transformers,oilcircuitbreakers,andsimilarappa-ratusasaninsulatingandcoolingmedium.RefertoTerminol-ogyD2864fordefinitionsusedinthistestmethod.1.2Thistestmethodissensitivetothedeleteriouseffectsofmoistureinsolutionespeciallywhencellulosicfibersarepresentintheliquid.Ithasbeenfoundtobeespeciallyusefulindiagnosticandlaboratoryinvestigationsofthedielectricbreakdownstrengthofinsulatingliquidininsulatingsystems.21.3ThistestmethodisusedtojudgeiftheVDEelectrodebreakdownvoltagerequirementsaremetforinsulatingliquids.Thistestmethodshouldbeusedasrecommendedbyprofes-sionalorganizationstandardssuchasIEEEC57.106.1.4ThistestmethodmaybeusedtoobtainthedielectricbreakdownofsiliconefluidasspecifiedinTestMethodD2225andSpecificationD4652,providedthatthedischargeenergyintothesampleislessthan20mJ(millijoule)perbreakdownforfiveconsecutivebreakdowns.1.5Boththemetricandthealternativeinch-poundunitsareacceptable.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3D235SpecificationforMineralSpirits(PetroleumSpirits)(HydrocarbonDryCleaningSolvent)D923PracticesforSamplingElectri...
