Astm D 3809 – 01 pdf free download

Standard Test Methods for
Synthetic Dielectric Fluids For Capacitors1

This standard is issued under the fixed designation D 3809; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

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

1.3 For methods relating to polybutene fluids refer to
Specification D 2296.

1.4 For methods relating to silicone fluids refer to Test
Methods D 2225.

1.5 A list of properties and standards are as follows:
Property Measured Section ASTM Test Method
Coefficient of thermal expansion 6 D 1903
Flash point 7 D 92
Pour point 8 D 97
Refractive index 9 D 1218
Relative Density/Specific gravity 10 D 1298
Viscosity 11 D 445
Acid number 12 D 664
Water content 13 D 1533
Relative permittivity 14 D 924
Dielectric strength 15 D 877
D 1816
Dissipation factor 16 D 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.

2. Referenced Documents

2.1 ASTM Standards:
D 92 Test Method for Flash and Fire Points by Cleveland
Open Cup2
D 97 Test Method for Pour Point of Petroleum Products2
D 445 Test Method for Kinematic Viscosity of Transparent

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