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

Volume

1

Issue

3

fYear

1994

fDate

6/1/1994 12:00:00 AM

Firstpage

377

Lastpage

382

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;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.300277

Filename

300277