Breakdown processes over large distances in insulating liquids of distinct chemical compositions

Author

McCluskey, F.M.J. ; Lesaint, O. ; Denat, A.

Author_Institution

Lab. d´´Electrostat. et de Mater. Dielectr., Univ. Joseph Fourier, Grenoble, France

fYear

1994

fDate

5-8 Jun 1994

Firstpage

426

Lastpage

429

Abstract

In this study we examine breakdown and prebreakdown phenomena in asymmetric geometry (point to plane) at large gap distances (up to 20 cm) under positive voltage steps (up to 500 kV) in liquids of distinct chemical families: saturated, aromatic and polyaromatic. Signal analysis shows that the currents are not continuous but are made up of bursts with different waiting times between them. The duration and number of these bursts vary according to the general chemical composition of the liquid. For example, there are numerous short bursts in mineral oil and a few long bursts in the aromatic liquids. The polyaromatic has a behaviour which retains features of both

Keywords

dielectric liquids; discharges (electric); electric breakdown; insulating oils; organic compounds; 20 cm; 500 kV; aromatic liquids; asymmetric geometry; bursts; chemical composition; chemical compositions; insulating liquids; large gap distances; mineral oil; polyaromatic liquids; positive voltage steps; prebreakdown; saturated liquids; signal analysis; Breakdown voltage; Chemical processes; Dielectric liquids; Electric breakdown; Electrodes; Geometry; Hydrocarbons; Insulation; Minerals; Petroleum;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on

Conference_Location

Pittsburgh, PA

ISSN

1089-084X

Print_ISBN

0-7803-1942-7

Type

conf

DOI

10.1109/ELINSL.1994.401428

Filename

401428