Standard Specification for
Mineral Insulating Oil Used in Electrical Apparatus1
This standard is issued under the fixed designation D 3487; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This specification covers new mineral insulating oil of
petroleum origin for use as an insulating and cooling medium
in new and existing power and distribution electrical apparatus,
such as transformers, regulators, reactors, circuit breakers,
switchgear, and attendant equipment.
1.2 This specification is intended to define a mineral insulating oil that is functionally interchangeable and miscible with
existing oils, is compatible with existing apparatus and with
appropriate field maintenance, 2 and will satisfactorily maintain its functional characteristics in its application in electrical
equipment. This specification applies only to new insulating oil
as received prior to any processing.
2. Referenced Documents
2.1 ASTM Standards:
D 88 Test Method for Saybolt Viscosity3
D 92 Test Method for Flash and Fire Points by Cleveland
Open Cup4
D 97 Test Method for Pour Point of Petroleum Products4
D 445 Test Method for Kinematic Viscosity of Transparent
and Opaque Liquids4
D 611 Test Methods for Aniline Point and Mixed Aniline
Point of Petroleum Products and Hydrocarbon Solvents4
D 877 Test Method for Dielectric Breakdown Voltage of
Insulating Liquids Using Disk Electrodes5
D 923 Test Method for Sampling Electrical Insulating Liquids5
D 924 Test Method for Dissipation Factor (or Power Factor)
and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids5
D 971 Test Method for Interfacial Tension of Oil Against
Water by the Ring Method5
Click below to download Astm D 3487 – 00 pdf free
[wpdm_package id=’24410′]
Click here to download Astm D 3485 – 02 Pdf Free Download