Title :
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
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;
Conference_Titel :
Electrical Contacts, 1994. Proceedings of the Fortieth IEEE Holm Conference on Electrical Contacts
Print_ISBN :
0-7803-2133-2
DOI :
10.1109/HOLM.1994.636818
