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

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1988Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Transactions on Electrical Insulation, volume 23, pages 97-100 (issn: 0018-9367,

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Authors: L.M.J. Vries; G.C. Damstra;

doi: 10.1109/14.2340

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

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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. >

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