ASTM D4652

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 25C and a fire point of 340C or greater. This specification applies only to new silicone fluid. Information on in-service maintenance testing is available in appropriate guides.

2. Referenced Documents

D 1169 Test Method for Specific Resistance (Resistivity) of Electrical Insulating Liquids
D 1298 Practice for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method
D 1481 Test Method for Density and Relative Density (Specific Gravity) of Viscous Materials by Lipkin Bicapillary Pycnometer
D 1533 Test Methods for Water in Insulating Liquids (Karl Fischer Reaction Method)
D 1807 Test Methods for Refractive Index and Specific Optical Dispersion of Electrical Insulating Liquids
D 1816 Test Method for Dielectric Breakdown Voltage of Insulating Oils of Petroleum Origin Using VDE Electrodes
D 2129 Test Method for Color of Water White Electrical Insulating Liquids
D 2161 Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity
D 2225 Methods of Testing Silicone Fluids Used for Electrical Insulation
D 2864 Terminology Relating to Electrical Insulating Liquids and Gases
D 4052 Test Method for Density and Relative Density of Liquids by Digital Density Meter
D 4059 Test Method for Analysis of Polychlorinated Biphenyls in Insulating Liquids by Gas Chromatography
D 445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity)
D 4559 Test Method for Volatile Matter in Silicone Fluid
D 664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration
D 877 Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes
D 92 Test Method for Flash and Fire Points by Cleveland Open Cup
D 923 Test Method for Sampling Electrical Insulating Liquids
D 924 Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids
D 97 Test Method for Pour Point of Petroleum Products
D 974 Test Method for Acid and Base Number by Color-Indicator Titration

Index Terms

electrical insulating liquid; silicone fluid

Citing ASTM Standards

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