Prebreakdown emission current measurements in a 24 kV vacuum interrupter with butt contacts

Author

Vries, L.M.J. ; Damstra, G.C.

Author_Institution

Div. of Res. & Dev., KEMA, Arnhem, Netherlands

Volume

23

Issue

1

fYear

1988

fDate

2/1/1988 12:00:00 AM

Firstpage

97

Lastpage

100

Abstract

Commercial 24-kV vacuum interrupters with butt contacts were tested under DC conditions with three different contact materials: OFHC-copper, stainless steel 304 and Cu/Cr (75/25, wt.%). The critical breakdown field was computed at contact distances of 1, 2 and 3 mm, based on the prebreakdown emission current and the breakdown voltage. While the values for the critical breakdown field for OFHC-copper and stainless steel 304 were in agreement with the values found by other authors, no previous data were found for Cu/Cr.

Keywords

circuit breakers; electric breakdown; switchgear testing; vacuum apparatus; 1 mm; 2 mm; 24 kV; 3 mm; Cu; CuCr; DC conditions; breakdown voltage; butt contacts; contact distances; contact materials; critical breakdown field; prebreakdown emission current; stainless steel 304; testing; vacuum interrupter; Breakdown voltage; Chromium; Circuit testing; Current measurement; Electric breakdown; Interrupters; Resistors; Steel; Vacuum breakdown; Voltage measurement;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.2340

Filename

2340