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ASTM D3809-79(1993)

ASTM D3809-79(1993)

Standard Method of Testing Synthetic Dielectric Fluids For Capacitors

2021-03-02 /Historical
Superseeded by:

1.1 These test methods cover testing synthetic dielectric fluids currently in use for capacitors. The methods are generally suitable for specification acceptance, factory control, referee testing, and research. Their applicability to future fluids has not been determined.

1.2 The scope of some of the test methods listed here apply to petroleum oils, but have been found suitable for synthetic fluids.

1.3 For methods relating to polybutene fluids refer to Specification D2296.

1.4 For methods relating to silicone fluids refer to Test Methods D2225.

1.5 A list of properties and standards are as follows:

Property MeasuredSectionASTM Test Method
Coefficient of thermal expansion6D 1903
Flash point7D 92
Pour point8D 97
Refractive index9 D 1218
Relative Density/Specific gravity10 D 1298
Viscosity11D 445
Acid number12D 664
Water content13D 1533
Relative permittivity14 D 924
Dielectric strength15D 877
D 1816
Dissipation factor16D 924

1.6 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

capacitor materials; dielectric constant (permittivity)/dissipation factor-electrical insulating;materials; dielectric fluids; electrical insulating liquids; synthetic dielectric fluids; synthetic dielectric fluids for capacitors, testing
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