Patent ID: 11959975
Assignee: BENDER GMBH & CO. KG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. A monitoring device (20) for selectively determining a partial insulation resistance Rx and a partial system leakage capacitance Cx of an outgoing line (4) in a branched ungrounded power supply system (2), having an insulation monitoring device (10) which is configured to actively superpose a measuring alternating voltage Um on the power supply system (2),
wherein an AC/DC measuring current transformer (14) for measuring a stationary partial current Ixstat and a non-stationary partial current ix(t) in each outgoing line (4) to be tested,
a voltage measuring device (22) which is switched between an active conductor of the ungrounded power supply system (2) and ground (PE) for measuring the temporal sequence of non-stationary conductor-to-ground voltage ue(t), and an evaluation unit (24) which is connected to the AC/DC measuring current transformer (14) and to the insulation monitoring device (10) and is configured for calculating partial insulation resistance Rx and partial system leakage capacitance Cx.