Patent ID: 8705216

Claim:
A high sensitivity leakage current detection interrupter (LCDI), comprising: a shielded wire, wherein a live core and a neutral core of the shielded wire are respectively wrapped in two conductive shell wires; a current leakage detection unit, comprising: a pair of rectifying diodes reversely connected in series between a live line and a neutral line of a power supply, wherein anodes of the rectifying diodes are connected together and cathodes of the rectifying diodes are respectively connected to the live line and the neutral line; a voltage dropping resistor, wherein one end of the voltage dropping resistor is connected to the anodes of the rectifying diodes, and the other end of the voltage dropping resistor is connected to the shell wires of the shielded wire; and thyristors, wherein control electrodes of the thyristors are respectively connected to the cathodes of the rectifying diodes, cathodes of the thyristors are respectively connected to the live line and the neutral line, and resistor-capacitor (RC) voltage dropping filter circuits are connected in parallel between the cathodes and the control electrodes; and a tripping mechanism, comprising control units with on/off respectively controlled by the thyristors, wherein if one of the thyristors is turned on, the corresponding control unit is turned on, and the tripping mechanism is actuated to switch off the power supply.