Pulse DC current leakage and over-voltage protection device

The utility model provides a pulse DC current leakage and over-voltage protection device which is characterized by comprising a current leakage sensor, a current leakage detection circuit, a power input unit, an over-voltage detection circuit and a power switch unit; the current leakage sensor is used for sensing current leakage signals and converting the current signals into voltage signals, and transmitting the voltage signals to the current leakage detection circuit; the current leakage detection circuit is used for obtaining DC voltage from the received current leakage signals after filtration, amplification and rectification, and sending the voltage to the power switch unit; and the power input unit is connected with the over-voltage detection circuit, the over-voltage detection circuit is connected with the power switch unit and cuts off a power supply of a protected line through the power switch unit, thereby effectively preventing electric shock accidents caused by current leakage and safety accidents