Plasma decay modeling during the post-arc phase of a vacuum circuit breaker

The post-arc phase of a vacuum circuit breaker is a critical phase for dielectric recovery in the context of medium voltage current interruption. A space-charged sheath expands from the cathode to the anode and expels the residual plasma from the gap. In addition, a background density of vaporized a...

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Bibliographic Details
Main Authors: Sarrailh, P., Garrigues, L., Hagelaar, G.J.M., Boeuf, J.-P., Sandolache, G., Rowe, S.W.
Format: Conference Proceeding
Language:English
Subjects:
Anodes
Atomic measurements
Cathodes
Circuit breakers
Electrodes
Geometry
Plasma density
Plasma properties
Plasma sheaths
Voltage
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Summary:The post-arc phase of a vacuum circuit breaker is a critical phase for dielectric recovery in the context of medium voltage current interruption. A space-charged sheath expands from the cathode to the anode and expels the residual plasma from the gap. In addition, a background density of vaporized atoms exists at the current zero. A two-dimensional hybrid model has been developed to evaluate the collisional sheath evolution during this phase in a cylindrical geometry. In this paper we show the influence on the dielectric recovery of the shield polarity with and without a given background atom density.
ISSN:1093-2941
DOI:10.1109/DEIV.2008.4676814