Patent ID: 7295016

Claim:
An electric leakage detection system for detecting an electric leakage of a power source unit which supplies an electric power to a load using an AC generator as a power source, wherein said electric leakage detection system comprises: a detection point forming circuit which forms a detection point being connected to each output line of said AC generator through a high impedance element; a voltage detection circuit which detects a voltage across said detection point and ground; and an electric leakage detecting part which detects that the electric leakage occurs when the voltage detected by said voltage detection circuit becomes equal to or higher than a determination value, wherein said AC generator is a three-phase AC generator; wherein said detection point forming circuit is constituted by three resistors, one end of each being connected to a three-phase output line of the AC generator, respectively, and the other end of each being commonly connected; and wherein a common connection point of said three resistors is used as said detection point.