Even if a failure occurs in the power supply function on the trunk station side, the power supply path switching device and power supply path switching can be used to the maximum extent possible without using the power supply function on the branch station side without having a power supply function. In order to provide the system and the power feeding path switching method, the power feeding path switching device (10) is supplied with the first switching means (20), the second switching means (30), the grounding means (40) and the power supply. An operating power consumption circuit (50) is provided. When a failure occurs in the first power supply line (61), the power consumption circuit (50) grounds the first power supply line (61) and connects one end of the power consumption circuit (50) to the grounding means (40). At the same time, the second feed line (62) is connected to the other end of the power consumption circuit (50). The power consumption circuit (50) grounds the second power supply line (62) when the failure occurs in the second power supply line (62), and connects the first power supply line (61) to the power consumption circuit (50). Connect to one end and connect the other end of the power consumption circuit (50) to the grounding means (24).
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