Patent ID: 9470737
Filing Date: 2016-10-18
CPC Classification: G01R

Claim Text:
1. A vehicle comprising at least an electric propulsion system powered by at least one electric power system, and at least one insulation resistance monitor for monitoring an insulation fault in an electric network coupled to the electric propulsion system, wherein the at least one electric power system comprises at least one electric power source having terminal leads, and the vehicle comprises at least one reference potential, each terminal lead having a respective breaker for opening and closing the terminal lead, the electric power source and the insulation resistance monitor being disposed on a same side of the breakers for the terminal leads, and wherein the insulation resistance monitor is arranged to monitor the insulation fault by monitoring an insulation resistance between the terminal leads and the at least one reference potential, by (i) disconnecting the at least one electric power source from the one or more loads by opening each terminal lead by opening the respective breakers for the terminal leads; (ii) measuring the insulation resistance (R_isol (iii) measuring the insulation resistance (R_isol (iv) closing one terminal lead by closing the respective breaker for the one terminal lead with the other terminal lead open; and (v) measuring a second insulation resistance (R_isol