Dielectric behavior of GIS switching disconnectors comparison of possible phase opposition tests

Author

Lalot, J. ; Sabot, A. ; Kieffer, J.

Author_Institution

Electricite de France, Paris, France

Volume

3

Issue

1

fYear

1988

fDate

1/1/1988 12:00:00 AM

Firstpage

214

Lastpage

222

Abstract

The dielectric behavior of a GIS (gas-insulated switchgear) switching disconnector is investigated by means of full-phase opposition tests to obtain data on the discharge-to-ground phenomenon. This phenomenon, which is a function of the voltage across the disconnector switch contacts before restrike and of the amplitude of the overvoltage after restrike, displays a very large scatter. In addition, the time-to-crest of the overvoltage has a great influence on the discharge to ground. A discharge-to-ground mechanism to explain all of these features is proposed. The guarantees of same disconnector switching given by two possible phase opposition tests having different overvoltage shapes and amplitude are compared

Keywords

gaseous insulation; switchgear; GIS switching disconnectors; dielectric behavior; discharge-to-ground phenomenon; gas-insulated switchgear; overvoltage; phase opposition tests; time-to-crest; Contacts; Dielectrics; Displays; Gas insulation; Geographic Information Systems; Scattering; Switches; Switchgear; Testing; Voltage control;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.4248

Filename

4248