ASTM_D_3809_-_01_2006.pdf

Designation:D380901(Reapproved 2006)Standard Test Methods forSynthetic Dielectric Fluids For Capacitors1This standard is issued under the fixed designation D3809;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover testing synthetic dielectricfluids currently in use for capacitors.The methods are gener-ally suitable for specification acceptance,factory control,referee testing,and research.Their applicability to future fluidshas not been determined.1.2 The scope of some of the test methods listed here applyto petroleum oils,but have been found suitable for syntheticfluids.1.3 For methods relating to polybutene fluids refer toSpecification D2296.1.4 For methods relating to silicone fluids refer to TestMethods D2225.1.5 A list of properties and standards are as follows:Property MeasuredSectionASTM Test MethodPhysical:Coefficient of thermal expansion6D1903Flash point7D92Pour point8D97Refractive index9D1218Relative Density/Specific gravity10D1298Viscosity11D445Chemical:Acid number12D664Water content13D1533Electrical:Relative permittivity14D924Dielectric strength15D877D1816Dissipation factor16D9241.6 This standard does not purport to address all of thesafety problems,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD97 Test Method for Pour Point of Petroleum ProductsD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD877 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using Disk ElectrodesD923 Practices for Sampling Electrical Insulating LiquidsD924 Test Method for Dissipation Factor(or Power Factor)and Relative Permittivity(Dielectric Constant)of Electri-cal Insulating LiquidsD1218 Test Method for Refractive Index and RefractiveDispersion of Hydrocarbon LiquidsD1298 Test Method for Density,Relative Density(SpecificGravity),or API Gravity of Crude Petroleum and LiquidPetroleum Products by Hydrometer MethodD1533 Test Method for Water in Insulating Liquids byCoulometric Karl Fischer TitrationD1816 Test Method for Dielectric Breakdown Voltage ofInsulating Oils of Petroleum Origin Using VDE Elec-trodesD1903 Practice for Determining the Coefficient of ThermalExpansion of Electrical Insulating Liquids of PetroleumOrigin,and AskarelsD2225 Test Methods for Silicone Fluids Used for ElectricalInsulationD2296 Specification for Continuity of Quality of ElectricalInsulating Polybutene Oil for CapacitorsD2864 Terminology Relating to Electrical Insulating Liq-uids and Gases1These test methods are under the jurisdiction of ASTM Committee D27 onElectrical Insulating Liquids and Gasesand are the direct responsibility of Subcom-mittee D27.02 on Gases and Non-Mineral Oil Liquids.Current edition approved Nov.1,2006.Published January 2007.Originallyapproved in 1979.Last previous edition approved in 2001 as D380901.DOI:10.1520/D3809-01R06.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesNOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM International(www.astm.org)for the latest information13.Terminology3.1 Definitions:3.1.1 coeffcient of thermal expansionthe increase in vol-ume per unit volume per degree change in temperature.It iscommonly stated as the average coefficient over a giventemperature range.3.1.2 total acid numberthe quantity of base,expressed inmilligrams of potassium hydroxide(KOH)that is required totitrate all acidic constituents present in 1 g of sample.3.2 For additional terms refer to Terminology D2864.4.Significance and Use4.1 Certain synthetic dielectric fluids are used in the manu-facture of capacitors because of their chemical,thermal,andelectrical properties as well as their environmental acceptabil-ity.4.2 Properties of a synthetic dielectric fluid differ from thoseof petroleum based fluids.Design considerations and qualitycontrol are influenced by these properties as measured by theappropriate tests.4.3 Each test method has its own brief statement describingits significance.5.Sampling Procedures5.1 Accurate sampling,whether of the complete contents oronly parts thereof,is extre