Residual current action (electric leakage) protection monostable delay control system

The invention provides a residual current action (electric leakage) protection monostable time delay control system. The system comprises an integrated circuit, a zero sequence transformer ZCT, a rectifying circuit, an actuating mechanism (tripping device), a circuit breaker, a thyristor and a monostable time delay circuit; the AC input end of the rectifying circuit is connected with a power supply of the circuit breaker, and the DC output end of the rectifying circuit is connected with the thyristor in series through the actuating mechanism (tripping device) to form a loop; the monostable delay circuit comprises a charging and discharging resistor R6, a switching diode D10 and a charging and discharging capacitor C4; the charging and discharging resistor R6 is connected with the switchingdiode D10 in parallel and then connected with the capacitor C4 in series to charge and discharge the capacitor C4 to complete delay output; the input end of the monostable delay circuit is connectedto the output end of an op