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

Author

MoScicka-Grzesiak, Hanna ; Ziomek, Waldemar ; Siodla, Krzysztof

Author_Institution

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

Volume

18

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

344

Lastpage

347

Abstract

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

Keywords

chromium alloys; copper alloys; electrical contacts; partial discharges; tungsten alloys; vacuum interrupters; CuCr; WCu; breakdown voltage; contact materials; electroinsulating properties; microdischarge phenomenon; multichannel analyzer; partial discharge measurements; pre-breakdown stage; sinter materials; vacuum gap; vacuum interrupters; Cathodes; Charge measurement; Circuits; Current measurement; Electric breakdown; Electrodes; Electron emission; Interrupters; Vacuum breakdown; Voltage measurement;

fLanguage

English

Journal_Title

Components, Packaging, and Manufacturing Technology, Part A, IEEE Transactions on

Publisher

ieee

ISSN

1070-9886

Type

jour

DOI

10.1109/95.390314

Filename

390314