Abstract:When 40.5kV vacuum circuit breakers are used to break currents in distribution system, reignition phenomena occur frequently resulting in high overvoltage and even interruption failure. In order to further the understanding of the reason of multiple reignition characteristics and give practical advice to vacuum switchgear manufacturers and users, research work has been completed based on plenty of tests. A synthetic circuit that can apply a DC recovery voltage after current zero for a long period was used to s… Show more
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