Public alarm rapid positioning device and method of switch cabinet of nuclear power station

The invention discloses a public alarm rapid positioning device and method of a switch cabinet of a nuclear power station, and belongs to the technical field of nuclear power station maintenance. Thedevice comprises an 220V AC power supply, a power terminal X1, a power terminal X2, a public fault relay K and an inter-cabinet connecting wiring circuit, the output L of the 220V AC power supply is connected with the input end of the power terminal X1, the output end of the power terminal X1 is connected with input of the inter-cabinet connecting wiring circuit, the output end of the inter-cabinet connecting wiring circuit is connected with the input end of the power terminal X2, the output end of the power terminal X2 is connected with the input end A1 of the public fault relay K, and the output end A2 of the public fault relay K is connected with the input end N of the 220V AC power supply. The structure is simple and reliable, a fault can be located rapidly, maintenance basis is provided for maintenance staff,