The present invention has: a switching element that is placed between a power conversion device and a line breaker for intercepting power supplied from a DC overhead wire to the power conversion device, and that supplies power to the power conversion device from the line breaker when the switching element is in ON operation; and a resistor connected in parallel to the switching element with a plurality of wirings interposed therebetween. The plurality of wirings are configured from a first wiring that connects an electrode on the high-potential side of the switching element with one end of the resistor, and a second wiring that connects an electrode on the low-potential side of the switching element with the other end of the resistor. The first wiring and the second wiring are placed facing each other and laminated. Current in mutually reverse directions flows in the first wiring and the second wiring when the switching element moves from ON to OFF.