Leakage current detection and interruption device for power cord and related electrical connectors and electrical appliances

A leakage current detection and interruption device for a power cord, comprising:

• a first power supply line and a second power supply line;
• a switch module, configured to control an electrical connection of the first power supply line and second power supply line between an input end and an output end;
• a leakage current detection module, including a first leakage current detection line and a second leakage current detection line, which respectively cover the first and second power supply lines and are configured to respectively detect leakage currents on the first and second power supply lines;
• an open circuit detection module, including a zero-sequence current transformer coupled to the leakage current detection module, the open circuit detection module being configured to generate an open-circuit fault signal in response to detecting an open circuit condition in at least one of the first and second leakage current detection lines;
• and
• a trigger module, coupled to the switch module and an output of the open circuit detection module, configured to receive the open-circuit fault signal, and in response thereto, to drive the switch module to disconnect the electrical connection between the input and output ends.

A leakage current detection and interruption device for a power cord, comprising:

• a first power supply line and a second power supply line;
• a switch module, configured to control an electrical connection of the first power supply line and second power supply line between an input end and an output end;
• a leakage current detection module, including a first leakage current detection line and a second leakage current detection line, which respectively cover the first and second power supply lines and are configured to respectively detect leakage currents on the first and second power supply lines;
• an open circuit detection module, including a photocoupler coupled to the leakage current detection module, the open circuit detection module being configured to generate an open-circuit fault signal in response to detecting an open circuit condition in at least one of the first and second leakage current detection lines;
• and
• a trigger module, coupled to the switch module and an output of the open circuit detection module, configured to receive the open-circuit fault signal, and in response thereto, to drive the switch module to disconnect the electrical connection between the input and output ends.