Patent ID: 9594110
Date: 2017-03-14
CPC Classifications: G01R,H02H

Claim:
1. An insulation monitoring device ( 2 ) for monitoring an ungrounded power supply system ( 4 ) comprising network sections ( 4 a , 4 b , 4 c ) that are switchably interconnected via operable coupling switches ( 6 a , 6 b ) in order to constantly monitor an insulation resistance against ground of the network sections ( 4 a , 4 b , 4 c ) both in a separated and simultaneously in an interconnected state, comprising a signal generator ( 14 ) for constantly generating a measuring signal and a coupling circuit ( 12 a , 12 b , 12 c ) for coupling the measuring signal to the power supply system ( 4 ), characterized in that the coupling circuit ( 12 a , 12 b , 12 c ) is provided for each network section ( 4 a , 4 b , 4 c ) to be monitored and that a switchable electrical connecting element ( 22 a , 22 b ) is arranged for connecting adjacent coupling circuits ( 12 a , 12 b , 12 c ).