High tension circuit breaker capable of interrupting fault currents having a delayed zero crossing

摘要

The invention relates to a high tension circuit breaker capable of interrupting alternating fault currents which have a pseudo period T. The faults occur at an instant t0 and delay the zero crossing of the current after a maximum time lapse of tzmax-t0. The circuit breaker includes a plurality of interrupting chambers in series. These chambers open at an instant t1 which is subsequent to the fault instant t0 and include moving equipment and an arc blaster. The arc blaster operates between instant t1 and instant tc, where instant tc is earlier than the instant tzmax-T. The circuit breaker also includes a feature which causes blasting to be extended to an instant t2 lying in the range tzmax-T and tzmax+T.