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

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3 Author(s)
Moscicka-Grzesiak, H. ; Inst. of Electr. Power Eng., Poznan, Poland ; Ziomek, W. ; Siodla, Krzysztof

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

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Components, Packaging, and Manufacturing Technology, Part A, IEEE Transactions on  (Volume:18 ,  Issue: 2 )