Leakage current detection and protection device, and power connector and electrical appliance employing the same

An leakage current detection and protection device for power supply lines, comprising:

• a leakage current detection module, configured to detect a leakage current present on the power supply lines and to generate a detection feedback signal in response to detecting the leakage current;
• a self-test module, configured to test whether the leakage current detection module is faulty, the self-test module including:
• a simulated leakage current trigger circuit, configured to generate a simulated leakage current trigger signal;
• a simulated leakage current generating circuit, configured to generate a simulated leakage current signal in response to the simulated leakage current trigger signal, wherein the simulated leakage current signal simulates a leakage current signal on the power supply lines;
• a trigger signal turn-off module, configured to turn off the simulated leakage current trigger signal in response to the detection feedback signal;
• and
• a fault signal generating module, coupled to the simulated leakage current trigger circuit, and configured to detect a fault in the leakage current detection module and to generate a self-test fault signal in response to detecting the fault;
• and
• a trip module, coupled on the power supply lines and configured to disconnect the power supply lines in response to the self-test fault signal.