ELECTRICAL SYSTEM COMPRISING A DEVICE FOR EVALUATING AN INSULATION FAULT, A MOTOR VEHICLE COMPRISING SUCH AN ELECTRICAL SYSTEM, AND A METHOD OF EVALUATING AN INSULATION FAULT

摘要

The electrical system (116) includes: an electrical circuit (118); an electrical mass (132); and a device (172) for evaluating an insulation fault (152) between the electrical circuit (118) and the electrical ground (132). The evaluation device (172) comprises: a device (168) for measuring a first common mode current (imc) supplied by an electric generator (164); a voltage measuring device (174) (vcp) provided by the electric generator (164); a device (176) for multiplying the measurement of the first common mode current (imc) by measuring the voltage (v) to obtain a power (p) developed by the electric generator (164) to supply the first mode current common (imc); a device (178) for determining an active part (P) of the power (p); a device (182) for determining at least one electrical quantity (R; IR_eff) representative of the insulation fault (152), from the active part (P) of the power (p).