POWER BLOCKING APPARATUS CAPABLE OF BLOCKING POWER SUPPLIED BY DETECTING VARIOUS ARCS AND OVERLOADS

摘要

The power blocking apparatus according to one embodiment of the present invention can include: a micro arc detecting unit turning on a first switching device on the basis of a voltage induced in a choke coil due to a high frequency pulse current caused by micro arcs occurring on a power line, and outputting a micro arc detection current during the turning on of the first switching device; a high current arc detecting unit outputting a high current arc detection current during the turning on of a second switching device on the basis of a magnetic field variation occurring in a coil inserted into the power line due to a high current arc on the power line; a delaying unit cumulatively charging the micro arc detection current or a high current arc detecting current to a delay capacitor using a predetermined time constant and outputting an arc detection signal when the voltage of the delay capacitor reaches a predetermined level; a power blocking unit capable of electrically blocking the load side and the power line when an operation voltage is applied; and the first switch connecting the operation voltage to the power blocking unit using an arc detection signal.