Abstract: An energy-saving ground-fault circuit interrupter (GFCI) includes an electronic circuit board provided in a housing and a breaker switch mounted on and controlled by the electronic circuit board. The electronic circuit board includes a power circuit, a test circuit, a work indicator circuit, a leakage detection circuit, a neutral-line ground fault detection circuit, a silicon-controlled rectifier (SCR) circuit, and an integrated circuit. The GFCI is characterized by further including a dual-coil switch-closing circuit parallel-connected to the power circuit and is advantageous in that the breaker switch can be rapidly closed by simultaneously supplying electricity to both coils to effect strong electromagnetic attraction, is kept closed by only one of the coils after current to the other coil is cut off via the properties of capacitors, and when a circuit fault occurs, is opened via an SCR which renders the single working coil out of electricity to ensure safety.

Abstract: A portable ground fault circuit breaker includes a main housing. An interior housing in which moving and static contacts are disposed is disposed inside the main housing and includes a base and a base cover. The static contacts are hung in the interior housing. The moving contacts are disposed on an unbalancing moving contact frame. A trip lock is disposed at one end of the moving contact frame and connected to a fasten lock fulfilling the separation and connection of the moving and static contacts. A lower portion of the fasten lock penetrates the base to abut on a tripping solenoid disposed at an exterior bottom of the base. The solenoid and a main control circuit on a circuit board fulfill an electrical connection. A simple structure, a small bulk, use convenience, and a humanized appearance design are the effects.