介绍了三相五柱式消弧线圈的工作原理，单相电弧接地过电压的工频熄弧理论。
The principle of arc-suppression coil with three phases and five columns , and theory of power frequency extinguishing arcing were introduced.
本发明提供一种具有熄弧系统的断路器(20)。
A circuit breaker (20) having an arc quenching system is provided.
由于直流熄弧电流不存在自然的过零点，因此必须强制过零才能熄灭直流电弧。
Due to DC arc extinguishing current has no natural zero-crossing point, so, DC arc can only been extinguished by forced zero-crossing-over.
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