Using the Electrical Field Analysis for Assessment of the Influence of Paper Insulation on Discharge Initiation in Oil

P. Rozga[1], D. Hantsz[1]
[1]Technical University of Lodz, Lodz, Poland
Published in 2013

Conclusions about the influence of paper insulation on the electrical discharge initiation in mineral oil may be drawn on the basis of experimental studies. However, in some cases, these conclusions may be supported by electrical field analysis. Determination of maximum values of electrical field stress in the vicinity of model electrode setups may bring a new information about initiation processes in paper-oil insulation setups. Obtained practically the same maximum values of electrical field stress, related to the experimentally measured times to initiation, indicated that these processes are similar. It confirms the hypothesis that responsible for initiation processes weak points of paper-oil insulation setups are included in oil, not at the surface of insulation wrapping or electrode metal.