IEEE 62:1978

New IEEE Standard - Superseded.
Diagnostic tests and measurements that are performed in the field on oil-immersed power transformers and regulators are described. Whenever possible, shunt reactors are treated in a similar manner to transformers. Tests are presented systematically in categories depending on the subsystem of the unit being examined. A diagnostic chart is included as an aid to identify the various subsystems. Additional information is provided regarding specialized test and measuring techniques.

This guide discusses the significance of various types of tests commonly employed to evaluate the insulation of power apparatus in the field, where environmental conditions cannot readily be controlled; the equipment and techniques required for each type of test; problems peculiar to field testing, and methods of dealing with these problems; and the application of field tests to specific types of power apparatus.