Patent ID: 8462006

Claim:
A ground fault interrupter that trips at its end-of-life and emits an end-of-life warning, comprising: a live load power supply line; a neutral load power supply line; a power unit comprising a rectifier and a filter; a tripping coil and a fuse connected in series to the rectifier; a leakage signal detection circuit comprising: a test toroidal coil; a neutral toroidal coil; and a leakage signal amplification circuit; a tripping silicon control having at least one igniter connection and at least one other connection, the igniter connection connected to the leakage signal amplification circuit and the at least one other connection connected in series to the power supply circuit of the tripping coil; a mechanical forcible tripping mechanism connected to the leakage signal detection circuit; a forcible tripping circuit for controlling the mechanical forcible tripping mechanism, the forcible tripping circuit comprising a forcible tripping coil connected in series with a forcible tripping silicon control, which is connected to the live load power supply line and the neutral load power supply line; a mechanical protection tripping mechanism; an interlock mechanism between the mechanical protection tripping mechanism and the mechanical forcible tripping mechanism; and a failure alarm circuit comprising a half-wave rectification filter circuit, a switch triode, and an optical display element, wherein: the power unit is configured to receive AC power from an AC power supply and to supply DC power through full wave rectification by the rectifier and filtration by the filter, the power unit supplies power to the leakage signal amplification circuit, the test toroidal coil and the neutral toroidal coil are connected to the leakage signal amplification circuit, the failure alarm circuit is connected to the DC output of the power unit, and the forcible tripping coil is connected in series to the live load power supply line and the neutral load line power supply line.