Leakage current detection and protection device for power cord

A power cord leakage current detection and protection device, comprising:

• a switch unit, configured to control electrical connection between an input end and an output end of the device;
• a leakage current protection unit, which includes a switch drive module and a leakage current detection module, the switch drive module configured to control the switch unit based on a leakage current signal detected by the leakage current detection module, wherein the leakage current detection module includes:
• a leakage current detection line, configured to detect whether a leakage current is present on a first power supply line and/or a second power supply line;
• and
• an open circuit detection unit, which includes a first detection module and a second detection module, wherein the leakage current detection line is coupled via the first detection module to one of the first power supply line and the second power supply line, and the second detection module is coupled to another one of the first power supply line and the second power supply line;
• wherein at least the first detection module and the leakage current protection unit form a test current loop, the test current loop configured to cause the switch drive module to control the switch unit to disconnect the electrical connection when the first detection module and/or the leakage current detection line has an open circuit.