IEC 62021-3 Ed. 1.0 b:2014

Current Revision
Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils

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Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils

PUBLISH DATE 2014
PAGES 54

Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils

IEC 62021-3:2014 describes two procedures for the determination of the acidity of unused and used electrical non-mineral insulating oils.

Method A is potentiometric titration and Method B is colourimetric titration.

The method may be used to indicate relative changes that occur in non-mineral insulating oil during use under oxidizing conditions regardless of the colour or other properties of the resulting non-mineral oil.

The acidity can be used in the quality control of unused non-mineral insulating oil.

As a variety of oxidation products present in used non-mineral insulating oil contribute to acidity and these products vary widely in their corrosion properties, the test cannot be used to predict corrosiveness of non-mineral insulating oil under service conditions.

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