High voltage circuit breaker capable of breaking delayed zero crossing fault currents.

摘要

P The present invention relates to a high-voltage circuit breaker capable of breaking alternating fault currents of pseudo-period T and delayed zero crossing, passing through zero after a maximum period of time tzmax-t0 after the instant t0 d appearance of the fault, this period of time tzmax-t0 being determined by simulations or by tests, comprising a plurality of interrupting chambers in series equipped with means for opening at an instant t1 subsequent to the instant of the fault t0 and arc blowing means designed to operate between instant t1 and an instant tc prior to instant tzmax-T. It includes means for reducing the blowing flow rate adapted so that the blowing is extended up to an instant t2 between tzmax-T and tzmax + T. /P