24-10-2016 дата публикации
Номер: KR1020160122353A
Принадлежит:
The present invention relates to an earth leakage circuit breaker (ELCB) having a selective Earth leakage breaking function, and more specifically, to an ELCB having a selective Earth leakage breaking function, which can be controlled not to recognize a low level of a sensitive current such as a start current or an unbalance current as a current leakage, if necessary, by allowing a function of a sensitive current selecting unit to be selectively used. According to an embodiment of the present invention, the ELCB having a selective earth leakage breaking function comprises: a zero current transformer; a sensitive current selecting unit receiving an electromotive signal generated by the zero current transformer, and selecting the sensitive current; a dedicated IC outputting a trip signal corresponding to an output signal of the sensitive current selecting unit; and a thyristor supplying a current to a trip coil to correspond to an output signal of the dedicated IC. The sensitive current selecting ...
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