Method for monitoring insulation faults in an electric network and vehicle comprising an insulation fault monitor

摘要

A method for monitoring an insulation fault in an electric network with at least one electric power system supplying electric power to one or more electric loads, and at least one insulation resistance monitor is provided, wherein the at least one electric power system includes at least one electrical power source, and wherein the at least one insulation resistance monitor monitors an insulation resistance between terminal leads of the at least one electric power source and at least one reference potential. The steps are performed of disconnecting the at least one electric power source from the one or more loads by opening each terminal lead; measuring the insulation resistance between the electric circuit of at least one electrical power source and the reference potential; measuring the insulation resistance for the total electric network; closing the second terminal lead with the first terminal lead open; and measuring the insulation resistance for the total electric network.

主权项

1. A method for monitoring an insulation fault in an electric network with at least one electric power system supplying electric power to one or more electric loads, and at least one insulation resistance monitor, wherein the at least one electric power system comprises at least one electrical power source, and wherein the at least one insulation resistance monitor monitors an insulation resistance between terminal leads of the at least one electric power source and 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, comprising the steps of
(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_isol0) between the electric circuit of at least one electrical power source and the reference potential; (iii) measuring the insulation resistance (R_isol1) for the total electric network; (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_isol2) for the total electric network.