Patent ID: 11913999
Assignee: SIEMENS AKTIENGESELLSCHAFT
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for detecting a ground fault in a load zone connectable to a DC system, the load zone, including a first load zone line grounded via a parallel circuit formed by a first grounding capacitor and a first grounding resistor, connectable to a first main line of the DC system via a circuit breaker and includes a second load zone line grounded via a parallel circuit formed by a second grounding capacitor and a second grounding resistor, connectable to a second main line of the DC system via an interrupter switches, the method comprising:
measuring continuously at least one line voltage, each at least one line voltage being assigned to one of the first load zone line and the second zone load line, between a line potential of the respective one of the first load zone line and the second load zone line, and a ground potential is measured, and
closing the interrupter switch, upon a ground fault not being detected on any of the first main line and second main line of the DC system before the load zone is connected, with the circuit breaker being open; and
deducing a ground fault in the load zone upon the at least one line voltage not significantly changing after the interrupter switch is closed.