ASTM D4652 - 05(2012)

    Standard Specification for Silicone Fluid Used for Electrical Insulation

    Active Standard ASTM D4652 | Developed by Subcommittee: D27.02

    Book of Standards Volume: 10.03


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    Abstract

    This specification covers silicone fluid, polydimethylsiloxane, for use in transformers, capacitors, and electronic assemblies as an insulating or cooling medium, or both. Physical, electrical, and chemical tests shall be conducted on the specimen to check for quality conformance. The silicone fluid shall conform to the color, flash point, fire point, pour point, refractive index, viscosity, specific gravity, weight of volatile matter, dielectric breakdown, disk electrodes, VDE electrodes, dissipation factor, volume resistivity, neutralization number, water content, and PCB content requirements.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers silicone fluid for use in transformers, capacitors, and electronic assemblies as an insulating or cooling medium, or both.

    1.2 Silicone fluid covered by this specification is polydimethylsiloxane having a nominal viscosity of 50 cSt at 25°C and a fire point of 340°C or greater. This specification applies only to new silicone fluid. Information on in-service maintenance testing is available in appropriate guides.2


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D92 Test Method for Flash and Fire Points by Cleveland Open Cup Tester

    D97 Test Method for Pour Point of Petroleum Products

    D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

    D664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration

    D877 Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes

    D923 Practices for Sampling Electrical Insulating Liquids

    D924 Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids

    D974 Test Method for Acid and Base Number by Color-Indicator Titration

    D1169 Test Method for Specific Resistance (Resistivity) of Electrical Insulating Liquids

    D1298 Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method

    D1481 Test Method for Density and Relative Density (Specific Gravity) of Viscous Materials by Lipkin Bicapillary Pycnometer

    D1533 Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration

    D1807 Test Methods for Refractive Index and Specific Optical Dispersion of Electrical Insulating Liquids

    D1816 Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using VDE Electrodes

    D2129 Test Method for Color of Clear ElectricalInsulating Liquids (Platinum-Cobalt Scale)

    D2161 Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity

    D2225 Test Methods for Silicone Fluids Used for Electrical Insulation

    D2864 Terminology Relating to Electrical Insulating Liquids and Gases

    D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

    D4059 Test Method for Analysis of Polychlorinated Biphenyls in Insulating Liquids by Gas Chromatography

    D4559 Test Method for Volatile Matter in Silicone Fluid


    ICS Code

    ICS Number Code 29.035.20 (Plastic and rubber insulating materials); 71.100.55 (Silicones)

    UNSPSC Code

    UNSPSC Code 12352310(Silicones)


    DOI: 10.1520/D4652-05R12

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