Patent ID: 8884638

Claim:
A circuit configuration for monitoring electrical insulation of an electrically conductive part relative to a first pole and a second pole of an electrical power network, the circuit configuration comprising: a first voltage divider connected between the electrically conductive part and the first pole, and a second voltage divider connected between the electrically conductive part and the second pole, said first voltage divider having at least two resistors and said second voltage divider having at least two resistors; a first measuring device coupled to said first voltage divider for measuring a partial voltage that drops across at least one of said at least two resistors of said first voltage divider; a second measuring device coupled to said second voltage divider for measuring a partial voltage that drops across at least one of said at least two resistors of said second voltage divider; a first switch device connected to said first voltage divider, said first switch device having a conduction state in which at least one of said at least two resistors of said first voltage divider is bypassed; and a second switch device connected to said second voltage divider, said second switch device having a conducting state in which at least one of said at least two resistors of said second voltage divider is bypassed.