Abstract

For observing the vacuum arc behavior variation, the experiment platform for a 40.5kV/31.5kA/2500A vacuum circuit breaker (VCB) was established and the variation of the arc voltage and arc current was obtained under the typical shortcircuit current breaking condition. Moreover, for analyzing the dielectric recovery characteristics and the interrupting capability for the VCB, the dynamic arc energy, the arc resistance and the arcing time under different short-circuit current breaking conditions was illustrated and analyzed.

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