Abstract: A high-voltage system including a high-voltage battery and a DC/DC converter, the high-voltage system having two different galvanically connected voltage levels with enabled DC/DC converters. A first measuring device detects the voltage of the high-voltage battery and a second measuring device detects the voltage at the output of the DC/DC converter. An insulation resistance measuring device may be configured to carry out insulation resistance measurements only when the DC/DC converter is disabled. A third measuring device may detect a voltage between a positive high voltage line and the ground and a fourth measuring device and a voltage between a negative high-voltage line and the ground. An insulation monitoring device may monitor the insulation resistances from data of the first to fourth measuring device at least when the DC/DC converter is enabled.

Abstract: A high-voltage system comprising a high-voltage battery and a DC/DC converter, the high-voltage system having two different galvanically connected voltage levels with enabled DC/DC converters, the high-voltage system having a first measuring device for detecting the voltage of the high-voltage battery and a second measuring device for detecting the voltage at the output of the DC/DC converter, the high-voltage system having an insulation resistance measuring device which is designed in such a way as to carry out insulation resistance measurements only when the DC/DC converter is disabled, wherein the high-voltage system further comprises a third measuring device for detecting a voltage between a positive high-voltage line and the ground and a fourth measuring device for detecting a voltage between a negative high-voltage line and the ground, the high-voltage system having an insulation monitoring device which is designed such that the insulation resistances are monitored from the data of the first to fourth m