1、Designation: D 4652 05Standard Specification forSilicone Fluid Used for Electrical Insulation1This standard is issued under the fixed designation D 4652; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers silicone fluid for use in trans-formers, capacitors, and electronic assemblies as an insulatingor cooling me
3、dium, 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 appropriate guide
4、s.22. Referenced Documents2.1 ASTM Standards:3D92Test Method for Flash and Fire Points by ClevelandOpen CupD97Test Method for Pour Point of Petroleum ProductsD 445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids (and the Calculation of DynamicViscosity)D 664 Test Method forAcid
5、Number of Petroleum Productsby Potentiometric TitrationD 877 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using Disk ElectrodesD 923 Test Method for Sampling Electrical InsulatingLiquidsD 924 Test Method for Dissipation Factor (or Power Factor)and Relative Permittivity (Dielectr
6、ic Constant) of Electri-cal Insulating LiquidsD 974 Test Method for Acid and Base Number by Color-Indicator TitrationD 1169 Test Method for Specific Resistance (Resistivity) ofElectrical Insulating LiquidsD 1298 Practice for Density, Relative Density (SpecificGravity), or API Gravity of Crude Petrol
7、eum and LiquidPetroleum Products by Hydrometer MethodD 1481 Test Method for Density and Relative Density(Specific Gravity) of Viscous Materials by Lipkin Bicap-illary PycnometerD 1533 Test Methods for Water in Insulating Liquids (KarlFischer Reaction Method)D 1807 Test Methods for Refractive Index a
8、nd SpecificOptical Dispersion of Electrical Insulating LiquidsD 1816 Test Method for Dielectric Breakdown Voltage ofInsulating Oils of Petroleum Origin Using VDE ElectrodesD 2129 Test Method for Color of Water White ElectricalInsulating LiquidsD 2161 Practice for Conversion of Kinematic Viscosity to
9、Saybolt Universal Viscosity or to Saybolt Furol ViscosityD 2225 Methods of Testing Silicone Fluids Used for Elec-trical InsulationD 2864 Terminology Relating to Electrical Insulating Liq-uids and GasesD 4052 Test Method for Density and Relative Density ofLiquids by Digital Density MeterD 4059 Test M
10、ethod forAnalysis of Polychlorinated Biphe-nyls in Insulating Liquids by Gas ChromatographyD 4559 Test Method for Volatile Matter in Silicone Fluid3. Terminology3.1 Definitions and descriptions of terms specific to thisspecification are given in Methods D 2225 and TerminologyD 2864.4. Sampling and T
11、esting4.1 Take all samples in accordance with Methods D 923.4.2 Test in accordance with the methods specified in Table1.1This specification is under the jurisdiction of ASTM Committee D-27 onElectrical Insulating Liquids and Gases and is the direct responsibility of Subcom-mittee D27.02 on Synthetic
12、s.Current edition approved Oct. 1, 2005. Published November 2005. Originallyapproved in 1992. Last previous edition approved in 1997 as D 4652 92(1997).2IEEE C57.111, IEEE Guide for Acceptance of Silicone Insulating Fluid and itsMaintenance in Transformers is published by the Insulating Fluids Subco
13、mmittee 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 w
14、ebsite.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 1Because of the different needs of the various users, itemsrelating to packaging, labeling, and quality assurance are subject tobuyer-seller agreement.NOTE 2In addition to a
15、ll other tests listed herein, it is soundengineering practice for the apparatus manufacturer to perform a func-tional evaluation of silicone fluid in insulation systems, prototype struc-tures, or full-scale apparatus, or any combination thereof, to assuresuitable survice life.5. Detail Requirements5
16、.1 The silicone fluid, as received, shall conform to therequirements of Table 1. The significance of these properties iscovered in Methods D 2225.6. Keywords6.1 electrical insulating liquid; silicone fluidASTM International takes no position respecting the validity of any patent rights asserted in c
17、onnection 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 standard is subject to revision at any time by the resp
18、onsible 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 International Headquarters. Your comments will receive carefu
19、l 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.This standard is copyrighted by ASTM International,
20、 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 (fax), or serviceastm.org (e-mail); or through the AST
21、M website(www.astm.org).TABLE 1 Detail Requirements for Silicone FluidProperty Limit ASTM Test MethodPhysical:Color, max 15 D 2129Flash point, C, min 300 D92Fire point, C, min 340 D92Pour point, C, max 50 D97Refractive index, 25C 1.4010 to 1.4040 D 1807Viscosity, cSt, at: D 445, D 21610C 81 to 9225C
22、 47.5 to 52.540C 35 to 39100C 15 to 17Specific gravity, 25/25C 0.957 to 0.964 D 1298, D 1481, D 4052Volatile matter, weight, max% 0.5 D 4559Electrical Properties:Dielectric breakdown voltage at 60 HzDisk electrodes, kV, min 30 D 877AVDE electrodes, kV, min at:1 mm (0.04 in.) gap 20 D 1816B2 mm (0.08
23、 in.) gap 35Dissipation factorCat 60 Hz, 25C, %, max 0.01 D 924Volume resistivity at 25C, Vcm, min 1 3 1014D 1169Chemical:Neutralization number, mg KOH/g, max 0.01 D 664, D 974Water content, ppm, max 50 D 1533DPCB content, ppm not detectable D 4059AThis test method must be modified as described in Methods D 2225.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.D 4652 052
