1.1 This standard specifies the requirements for unused insulating oil as delivered in bulk such as rail tank wagons and road tankers or drums, suitable for immersion or filling of transformers, switchgears, regulators, reactors and certain other electrical equip-ment in which the oil is required as an insulator for heat transfer.
1.1.1 The oils covered by this standard are inhibited low viscosity mineral oil mixed with a suitable oxidation inhibitor where greater oxidation resistance is required.
1.1.2 Before adding inhibitors, the oil covered by this standard shall fully conform to IS : 335-1983*.
1.2 This standard does not apply to:
a) uninhibited oil,
b) oil required for cables and switchgear requiring high viscosity oil or for special impregnation purposes, and
c) synthetic dielectric liquids.
IS 12463-1988 history
1989IS 12463-1988 Specification for Inhibited Mineral Insulating Oils