ASTM_D_4652_-_20.pdf

Designation:D465220Standard Specification forSilicone Liquid Used for Electrical Insulation1This standard is issued under the fixed designation D4652;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 This specification covers silicone liquid for use intransformers,capacitors,and electronic assemblies as an insu-lating or cooling medium,or both.1.2 Silicone liquid covered by this specification is polydim-ethylsiloxane having a nominal viscosity of 50 mm2/s at 25Cand a fire point of 340C or greater.This specification appliesonly to new silicone liquid.Information on in-service mainte-nance testing is available in appropriate guides.21.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D92 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 LiquidsD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1169 Test Method for Specific Resistance(Resistivity)ofElectrical Insulating LiquidsD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD1481 Test Method for Density and Relative Density(Spe-cific Gravity)of Viscous Materials by Lipkin BicapillaryPycnometerD1533 Test Method for Water in Insulating Liquids byCoulometric Karl Fischer TitrationD1807 Test Methods for Refractive Index and SpecificOptical Dispersion of Electrical Insulating Liquids(With-drawn 2014)4D1816 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using VDE ElectrodesD2129 Test Method for Color of Clear Electrical InsulatingLiquids(Platinum-Cobalt Scale)D2225 Test Methods for Silicone Fluids Used for ElectricalInsulationD2864 Terminology Relating to Electrical Insulating Liq-uids and GasesD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4059 Test Method for Analysis of Polychlorinated Biphe-nyls in Insulating Liquids by Gas ChromatographyD4559 Test Method for Volatile Matter in Silicone Fluid3.Terminology3.1 Definitions and descriptions of terms specific to thisspecification are given in Test Methods D2225 and Terminol-ogy D2864.4.Sampling and Testing4.1 Take all samples in accordance with practices listed inD923.1This specification is under the jurisdiction of ASTM Committee D27 onElectrical Insulating Liquids and Gasesand is the direct responsibility of Subcom-mittee D27.02 on Gases and Non-Mineral Oil Liquids.Current edition approved Nov.1,2020.Published November 2020.Originallyapproved in 1992.Last previous edition approved in 2012 as D4652 05(2012).DOI:10.1520/D4652-20.2IEEE C57.111,IEEE Guide for Acceptance of Silicone Insulating Fluid and itsMaintenance in Transformers is published by the Insulating Fluids Subcommittee ofthe IEEE Power Engineering Society Transformers Committee.3For 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.4The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.14.2 Test in accordance with the methods specified in Table1.NOTE1Because of the different needs of the various users,itemsrelating to packaging,labeling,and quality assurance are subject tobuyer-seller agreement.NOTE2In addition to all other tests listed herein,it is soundengineering p