Residual current protection device and residual current protection method for road lighting

The invention discloses a residual current protection device and a residual current protection method for road lighting. The residual current protection device comprises a residual current detection circuit used to detect the leakage current of a lighting loop, a temperature detection circuit used to detect the temperature of the outlet line of the lighting loop, a voltage detection circuit used to detect the voltage of the lighting loop in real time, and a relay control circuit used to control on-off of the lighting circuit. The residual current detection circuit, the temperature detection circuit, the voltage detection circuit and the relay control circuit are connected with a controller. According to the invention, a matching action threshold is set according to the actual characteristics of a protected line, so that fault leakage current can be cut off more accurately and reliably, and a rapid and effective protection effect is achieved. The occurrence of electric shock to pedestrians, fire and other malignant accidents is avoided.