| 摘要 |
The present invention provides a DC circuit breaker capable of bidirectionally breaking a fault current that flows in a DC line when a fault occurs in the DC line. This DC circuit breaker comprises: a first mechanical switch having a first DC line connected to one side thereof and a first conductive connecting member connected to the other side thereof; a second mechanical switch having the first conductive connecting member connected to one side thereof and a second DC line connected to the other side thereof; a first diode connected in parallel to the first mechanical switch on a first branching line branched from the first DC line; a second diode connected in series to the first diode through the second conductive connecting member and connected in parallel to the second mechanical switch on a second branching line branched from the second DC line; and a semiconductor switching circuit installed on a line connected between the first conductive connecting member and the second conductive connecting member, and switching the flow of a fault current when a fault occurs. |
