The GNM10L series leakage automatic switch is suitable for use in circuits with AC voltage of 380 volts and below, frequency of 50 hertz, and rated current of 600 amps and below for leakage protection. When someone is electrocuted or the leakage current of the circuit exceeds the specified value, the leakage switch can automatically cut off the power source within 0.2 seconds, ensuring personal safety and preventing accidents caused by leakage current. At the same time, it can be used to protect the overload and short circuit of the circuit and motor, and can also be used for infrequent switching of the circuit and infrequent starting of the motor.