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📖 Description
Describes three test methods using the same apparatus for evaluating the oxidation stability of mineral insulating oils and of hydrocarbon-based insulating liquids. A method for evaluating the oxidation stability of unused uninhibited mineral insulating oils under accelerated conditions, a method for oils, a method for unused uninhibited and inhibited hydrocarbon insulating liquids. Replaces IEC 60074 (1963), IEC 60474 (1974) and IEC 60813 (1985).