Anti-misoperation device of electromagnetic lock by monitoring leakage current of arrester

The invention discloses an anti-misoperation device of an electromagnetic lock by monitoring the leakage current of an arrester. A high-voltage presence indication device comprises a three-phase current sensor, a TVS (Transient Voltage Suppressor), a three-phase amplification filter circuit, a master MCU (Microprogrammed Control Unit), an LED (Light Emitting Diode) circuit and a lockout circuit, wherein the LED circuit comprises an LED driving circuit and an LED main circuit; the lockout circuit comprises a lockout driving circuit and an electromagnetic lock main circuit; the output end of the three-phase current sensor is respectively connected with the input end of the TVS and the input end of the three-phase amplification filter circuit; the output end of the three-phase amplification filter circuit is connected with the input end of the master MCU; the output end of the master MCU is respectively connected with the input end of the LED driving circuit and the input end of the lockout driving circuit; the output end of the LED driving circuit is connected with the input end of the LED main circuit; and the output end of the lockout driving circuit is respectively connected with the input end of the electromagnetic lock main circuit. High-voltage equipment can realize installation and maintenance of the high-voltage presence indication device without power cut.