Electrical Insulating Oils

ASTM D 3487 Specification for Mineral Insulating Oils Used in Electrical Apparatus

ASTM D 5522 Specification for High Fire-Point Mineral Electrical Insulating Oils (not on disk)

ASTM D 6871 Specification for Natural (Vegetable Oil) Ester Fluids Used in Electrical Apparatus

ASTM D 2003 Specification for Continuity of Quality of Electrical Insulating Polybutene Oil for Capacitors

ASTM D 2472 Specification for Sulfur Hexafluoride, SF6

ASTM D 117 Standard Guide for Sampling, Test Methods, and Specifications for Electrical Insulating Oils of Petroleum Origin.

ASTM D 2864 Terminology Relating to Electrical Insulating Liqiids.

Recommendation : Put this aside until new Vol 15.05 is issued. Then update.

Electrical Insulating Oils, ASTM D 3487

This specification relates to hydrocarbon based mineral insulating oils that are used in new and existing apparatus for power distribution such as transformers, circuit breakers, and switching gear. It provided for normal flammability. For less flammable, high fire-point mineral insulating oils, see ASTM Specification D 5222

ASTM D 3487 covers two types of oil which differ primarily in their level of oxidation resistance. Type I Mineral Oil provides normal oxidation resistance. Type II Mineral Oil is for apparatus that requires greater oxidation resistance that is usually achieved with a suitable oxidation inhibitor.

New electrical insulating oils must be free of PCBs. Electrical apparatus that has been drained, flushed, and replaced with PCB-free mineral oil can be tested once for verification and then certified so that future testing for PCBs can be discontinued.

Qualification tests for these ASTM D 3487 mineral insulating oils are in three groups:

A suggested test package for In-Service fluids is also provided. It contains a selected group of tests from the Qulaification Package along with some optional tests that are useful for detecting contaminants such as water, particulates, and trace metals.

We will also be happy to quote a testing package to your specifications.