Dielectric strength of a vacuum interrupter contact gap after making current operations

Zdzisław Załucki; Janusz Kutzner

doi:10.1109/TDEI.2003.1219641

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Title

Dielectric strength of a vacuum interrupter contact gap after making current operations

Authors

Zdzisław Załucki (WE) ^{[ 1 ][ P ]}
Janusz Kutzner (WE) ^{[ 1 ][ P ]}

^{[ 1 ]} Instytut Elektroenergetyki, Wydział Elektryczny, Politechnika Poznańska | ^{[ P ]} employee

Year of publication

2003

Published in

IEEE Transactions on Dielectrics and Electrical Insulation

Journal year: 2003 | Journal volume: vol. 10 | Journal number: iss. 4

Article type

scientific article

Publication language

english

Keywords

EN

dielectric strength
breakdown voltage
vacuum interrupter
vacuum contact gap
switching operation
making current
contact welding
contact surface
prebreakdown current

Abstract

EN Experimental results concerning the breakdown voltage and prebreakdown current of a vacuum interrupter contact gap, after making current operations, are presented. The dielectric strength of the contact gap is lowest for a switching sequence during which a making of high current is followed by a no-load contact opening. The breakdown voltage is much lower than after making operation, followed by interruption of a sufficiently high current. The basic process of breakdown initiation appears to be field electron emission from a specific structure on the contact surface, created by weld rupture.

Pages (from - to)

583 - 589

DOI

10.1109/TDEI.2003.1219641

URL

https://ieeexplore.ieee.org/document/1219641

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