Patent ID: 9103892
Filing Date: 2015-08-11
Classification: G01R

Abstract:
1. A ground fault detection system for judging a ground fault, on the basis of a threshold for judging a ground fault, for a high-tension power supply system which is mounted in a vehicle in an electrically insulated state, the ground fault detection system including: a judging means to alter the threshold on the basis of a state of the vehicle and judge the ground fault on the basis of the altered threshold; and a plurality of vehicle equipment which are connected to the high tension power supply system, wherein: each of the plurality of vehicle equipment and the judging means is mutually connected so as to communicate; each of the plurality of vehicle equipment is configured to store a value of capacitance of its common mode capacitor as the state of the vehicle and to transmit the value of capacitance of its common mode capacitor to the judging means; and the judging means alters the threshold in conformity to the value of the capacitance of the common mode capacitor received from each of the plurality of vehicle equipment.