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

A leakage current detection and interruption device, comprising:

• power supply lines including a first current-carrying line and a second current-carrying line, having an input end configured to be connected to a power source and an output end configured to be connected to an electrical load;
• and
• a leakage current detection module, including a first leakage current detection line, a second leakage current detection line, a signal line, and one or more electrical circuit elements selected from a group consisting of resistors, capacitors, inductors, and semiconductor elements, configured to detect a leakage current signal on the first current-carrying line or the second current-carrying line and to generate a leakage fault signal in response to detecting the leakage current signal,
• wherein the first leakage current detection line and second leakage current detection line are electrically insulated from each other, and respectively cover one of the first current-carrying line and the second current-carrying line, wherein each of the first leakage current detection line, the second leakage current detection line, and the signal line has a first end and a second end, the first end being located closer to the input end than the second end is and the second end being located closer to the output end than the first end is, and wherein the one or more electrical circuit elements are either coupled between the second end of the first leakage current detection line and the second end of the signal line, or coupled between the second end of the second leakage current detection line and the second end of the signal line, or both.