Ground fault circuit interrupter devices and related electrical connectors and electrical appliances

A ground fault circuit interrupter device comprising:

• a plurality of current carrying lines having an input end and an output end, including a neutral line;
• a switch module, coupled on the plurality of current carrying lines between the input end and the output end, configured to connect or disconnect an electrical connection between the input end and the output end;
• a ground fault detection module, including at least one neutral line detection coil through which the plurality of current carrying lines pass, wherein the at least one neutral line detection coil has a magnetic core made of a silicon steel material, and wherein the ground fault detection module is configured to detect a ground fault in the neutral line and to generate a ground fault signal in response thereto, wherein when a simulated grounding resistance of the neutral line Rt is 2 ohms, a peak value of a voltage waveform generated by the ground fault signal on the simulated grounding resistance is greater than or equal to 16 mV and each period of the voltage waveform includes a flat-shoulder segment that lasts no less than 1/10 of the period;
• a leakage current detection module, coupled to the current carrying lines, configured to detect the ground fault signal and to detect a leakage current signal on the current carrying lines, and to generate a zero sequence current fault signal in response to detecting the ground fault signal and/or the leakage current signal;
• and
• a drive module, coupled to the switch module and the leakage current detection module, configured to receive the zero sequence current fault signal, and to drive the switch module to disconnect the electrical connection in response to the zero sequence current fault signal.