Oxidation Stability Of Mineral Insulating Oil

Product Description

Introduction

This test method determines the resistance of mineral transformer oils to oxidation under prescribed accelerated aging conditions. Oxidation stability is measured by the propensity of oils to form sludge and acid products during oxidation.

Significance and Use

A test specimen of mineral transformer oil is oxidized at bath temperature, in the presence of a copper catalyst coil, by bubbling oxygen through duplicate test specimens for 72 and 164 h, respectively. The oil is evaluated at the end of each aging period by measuring the amount of sludge and acid formed. The test specimen is diluted with n heptane and the solution filtered to remove the sludge. The sludge is then dried and weighed.

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