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Computer simulation of post-arc plasma behavior at short contact separation in vacuum

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2 Author(s)
Glinkowski, M. ; Dept. of Electr. Power Eng., Rensselaer Polytech. Inst., Troy, NY, USA ; Greenwood, A.

Rapid commutation of a vacuum arc prior to zero results in the postarc current that subsequently flows due to the transient recovery voltage (TRV) developing across the interelectrode gap. If the rate of change of the arc current exceeds the ability of the device to interrupt the condition, it can be reestablished in the reverse direction, i.e. what was the anode becomes the new cathode. An attempt to model the postcurrent zero phenomena in the light of gas dynamics as applied to the plasma of the metal vapor arc is described. The basic conservation laws and the Maxwell equations, as well as the current continuity law, are formulated and the solutions of those equations are presented. The short distance between the electrodes in practice of much less than a millimeter is specifically noted

Published in:

Plasma Science, IEEE Transactions on  (Volume:17 ,  Issue: 1 )

Date of Publication:

Feb 1989

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