Title :
Breakdown and prebreakdown phenomena in liquids under positive impulse voltages
Author :
McCluskey, F.M.J. ; Denat, A. ; Lesaint, O.
Author_Institution :
CNRS, Univ. Joseph Fourier, Grenoble, France
fDate :
6/1/1994 12:00:00 AM
Abstract :
We examine the breakdown and prebreakdown behavior of two insulating liquids: benzyl-toluene and mineral oil in a nonuniform electric field at large distances (up to 20 cm) under a positive impulse voltage. We evaluate and compare the breakdown strengths of both liquids in these conditions as a function of interelectrode distance via Weibull type plots, a method commonly used when dealing with insulating gases and solids. The comparative behaviors of the liquids change greatly when the cumulative probability of breakdown is decreased from 100%. The second part of this study concerns streamer stopping lengths and the corresponding current and light emission signals
Keywords :
electric breakdown of liquids; electric strength; insulating oils; organic insulating materials; Weibull type plots; benzyl-toluene; breakdown behavior; breakdown strengths; cumulative breakdown probability; insulating liquids; interelectrode distance; light emission signals; mineral oil; nonuniform electric field; positive impulse voltages; prebreakdown phenomena; streamer stopping lengths; Breakdown voltage; Dielectric liquids; Dielectrics and electrical insulation; Electric breakdown; Gas insulation; Gases; Minerals; Nonuniform electric fields; Oil insulation; Petroleum;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
