Tests for Damaging Corona on Oil-Insulated Power Transformers

1 December 1967

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems

Vol. PAS-86 (12) , 1592-1595
https://doi.org/10.1109/tpas.1967.291946

Abstract

A draft of a proposed standard procedure for corona tests on oil-immersed transformers is presented and some of the problems in the development of the test procedure are discussed. The IEEE Transformers Committee has approved publicizing the proposed test method which is based on radio influence voltage (RIV) measurements utilizing a radio noise (RN) meter coupled to the winding under test through a coupling capacitor or the capacitance tap of a bushing. A special tuned circuit is used with the bushing capacitance tap method to minimize attenuation of the RIV due to the ratio of the bushing capacitances and thus increase the sensitivity of the method. Problems requiring further study include: 1) selection of test voltage values, 2) terminal circuit connections for test voltage, and 3) the actual values of RIV permissible at the test voltages.

Keywords

This publication has 2 references indexed in Scilit:

Guide for Calibration of Test Equipment and Circuits for Measurement of Corona Pulses
IEEE Transactions on Power Apparatus and Systems, 1967
Discharge detection and measurements
Proceedings of the Institution of Electrical Engineers, 1965