Patent ID: 11867718
Assignee: BENDER GMBH & CO. KG
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 10:
11. A device configured for identifying and locating cyclic momentary insulation faults in an ungrounded power supply system having a consumer connected via a branch circuit, comprising
a differential current sensor configured for detecting a fault current caused by the momentary insulation fault as a differential current in the branch circuit being monitored and displaying the temporal progression of the differential current via a differential current signal,
a computing unit configured for (a) receiving a processing signal which temporally describes a process sequence of a process taking place in the consumer, (b) correlating the differential current signal with the processing signal in order to yield a correlation signal as a measure for a temporal match between the differential current signal and the processing signal, and (c) signaling a momentary insulation fault by means of a signaling signal if the correlation signal shows the temporal match.