DC CIRCUIT BREAKER AND CIRCUIT BREAKING METHOD OF THE DC CIRCUIT BREAKER

The present invention relates to a DC circuit breaker and a circuit breaking method thereof and, more particularly to a DC circuit breaker 100 which, with a purpose of overcoming the limitations imposed on the prior art, comprises: a measuring portion 10 for measuring a DC current conducted through a first circuit portion 20; the first circuit portion 20 for conducting and blocking the DC current; and a second circuit portion 30 for conducting and blocking the DC current which is bypassed from the first circuit portion and controlling the open/close operation of the first circuit portion 20 according to a measuring result of the measuring portion 10, wherein, in the first circuit portion 20 and the second circuit portion 30, switching elements 21, 22, 31, which are included in each of them, are connected in a parallel configuration such that a high switching operation during a blocking operation can be improved and the DC current can be blocked in a safer and more efficient manner, and a circuit breaking method of the DC circuit breaker.