Patent ID: 6057996
Filing Date: 2000-05-02
Classification: H02H

Abstract:
A leakage current alarming/blocking apparatus, comprising:an antiphase transformer in which the phases of an alternating current from a secondary side of the antiphase transformer is antiphased with respect to a ground potential;a virtual ground unit connected with an output terminal of the antiphase transformer for forming a virtual ground potential;an electric appliance conductive material formed on a surface of an electric appliance connected with the virtual potential of the virtual ground unit;a leakage current detector for repeatedly detecting leakage current from the electric appliance conductive material and outputting a signal indicating leakage current;an electric power controller for blocking the supply of the electric power when the signal indicating the leakage of the current is input;an alarming signal generator for generating an alarming signal when the signal indicating the leakage of the current is input from the leakage current detector; anda direct current supply unit for converting the alternating current into the direct current and applying the direct current to the leakage current detector, the electric power controller, and the alarming signal generator, respectively.