- Transformers
ASTM D3487 Type II
Inhibited mineral dielectric oil for transformers, circuit breakers and switchgear
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IEC 60296, Type A — uninhibited transformer oil
Type A of IEC 60296: a mineral insulating oil for transformers without added oxidation inhibitor.
Mineral transformer oil Type II — ASTM D3487
Type II of ASTM D3487: a mineral insulating oil for electrical apparatus with a lower pour point than Type I.

Dielectric oil for transformers, circuit breakers, and switchgear.
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