1、Designation: D4652 05 (Reapproved 2012)Standard Specification forSilicone Fluid 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 l
2、ast 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 fluid for use intransformers, capacitors, and electronic assemblies as an insu-latin
3、g or cooling medium, or both.1.2 Silicone fluid covered by this specification is polydim-ethylsiloxane having a nominal viscosity of 50 cSt at 25C anda fire point of 340C or greater. This specification applies onlyto new silicone fluid. Information on in-service maintenancetesting is available in ap
4、propriate guides.22. 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
5、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 Permi
6、ttivity (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 (SpecificGravity), or API Gravit
7、y of Crude Petroleum and LiquidPetroleum Products 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 fo
8、r Refractive Index and SpecificOptical Dispersion of Electrical Insulating LiquidsD1816 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using VDE ElectrodesD2129 Test Method for Color of Clear ElectricalInsulatingLiquids (Platinum-Cobalt Scale)D2161 Practice for Conversion of Kinem
9、atic Viscosity toSaybolt Universal Viscosity or to Saybolt Furol ViscosityD2225 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 De
10、nsity 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 Methods D2225 and TerminologyD2
11、864.4. Sampling and Testing4.1 Take all samples in accordance with Methods D923.4.2 Test in accordance with the methods specified in Table1.NOTE 1Because of the different needs of the various users, itemsrelating to packaging, labeling, and quality assurance are subject tobuyer-seller agreement.NOTE
12、 2In addition to all other tests listed herein, it is soundengineering practice for the apparatus manufacturer to perform a func-tional evaluation of silicone fluid in insulation systems, prototypestructures, or full-scale apparatus, or any combination thereof, to assuresuitable survice life.1This s
13、pecification 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 Oct. 15, 2012. Published October 2012. Originallyapproved in 1992. Last previou
14、s edition approved in 2005 as D4652 05. DOI:10.1520/D4652-12.2IEEE 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 st
15、andards, 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,
16、 PA 19428-2959. United States15. Detail Requirements5.1 The silicone fluid, as received, shall conform to therequirements of Table 1. The significance of these properties iscovered in Methods D2225.6. Keywords6.1 electrical insulating liquid; silicone fluidASTM International takes no position respec
17、ting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This sta
18、ndard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Internati
19、onal Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below
20、This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (f
21、ax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Detail Requirements for Silicone FluidProperty Limit ASTM Test MethodPhysical:Color, max 15 D2129Flash
22、point, C, min 300 D92Fire point, C, min 340 D92Pour point, C, max 50 D97Refractive index, 25C 1.4010 to 1.4040 D1807Viscosity, cSt, at: D445, D21610C 81 to 9225C 47.5 to 52.540C 35 to 39100C 15 to 17Specific gravity, 25/25C 0.957 to 0.964 D1298, D1481, D4052Volatile matter, weight, max% 0.5 D4559Ele
23、ctrical Properties:Dielectric breakdown voltage at 60 HzDisk electrodes, kV, min 30 D877AVDE electrodes, kV, min at:1 mm (0.04 in.) gap 20 D1816B2 mm (0.08 in.) gap 35Dissipation factorCat 60 Hz, 25C, %, max 0.01 D924Volume resistivity at 25C, Vcm, min 1 1014D1169Chemical:Neutralization number, mg K
24、OH/g, max 0.01 D664, D974Water content, ppm, max 50 D1533DPCB content, ppm not detectable D4059AThis test method must be modified as described in Methods D2225.BUse of this test method requires the discharge energy meet the limits of Section 1.4 of the test method.CDissipation factor and power factor are numerically equal up to 0.5 %.DWith modifications as indicated for silicone fluid.D4652 05 (2012)2
