Estimation of the properties of contact materials used in vacuum interrupters based on investigations of microdischarge phenomena

Author

Moscicka-Grzesiak, H. ; Siodla, K. ; Ziomek, W.

Author_Institution

Inst. of Electr. Power Eng., Tech. Univ. Poznan, Poland

fYear

1994

fDate

17-19 Oct. 1994

Firstpage

39

Lastpage

42

Abstract

The paper presents electroinsulating properties of vacuum gaps between chosen contact materials used in vacuum interrupters. Cu-Cr25, Cu-Cr50 and W-Cu30 sinter materials were investigated. Typical microdischarge phenomena in the prebreakdown stage were analyzed using an arrangement for partial discharge measurements as well as multichannel analyzers. It has been found that there is a very strong relation between breakdown voltage in vacuum gaps and parameters describing microdischarges.

Keywords

electric strength; electrical contacts; partial discharges; vacuum breakdown; vacuum interrupters; Cu-Cr; W-Cu; breakdown voltage; contact materials; electroinsulating properties; microdischarges; multichannel analyzer; partial discharges; prebreakdown; sinter materials; vacuum gaps; vacuum interrupters; Cathodes; Circuits; Contacts; Electrodes; Electron emission; Interrupters; Laboratories; Vacuum breakdown; Vacuum technology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Contacts, 1994. Proceedings of the Fortieth IEEE Holm Conference on Electrical Contacts

Print_ISBN

0-7803-2133-2

Type

conf

DOI

10.1109/HOLM.1994.636818

Filename

636818