Electricity: electrical systems and devices – Safety and protection of systems and devices – Series connected sections with faulty section disconnect
Reexamination Certificate
2005-01-11
2005-01-11
Leja, Ronald (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Series connected sections with faulty section disconnect
C361S093600
Reexamination Certificate
active
06842319
ABSTRACT:
The invention relates to a method and arrangement for generating a trigger signal according to the current differential protection principle when a fault occurs on a section of an electrical power supply system, in which differential current values and stabilization current values are detected and monitored with regard to exceeding limit values. A trigger signal is generated if positive results of the instances of monitoring are present. The differential current values and the stabilization current values are calculated with instantaneous values of the detected power supply currents as instantaneous values. A first measurement quantity and a second measurement quantity are formed, and a check is made to determine whether the two measurement quantities exceed a predetermined limit value of the differential quotient of the differential current with respect to time. If the instances of evaluation and the instances of monitoring produce positive results, the trigger signal is generated.
REFERENCES:
patent: 4237512 (1980-12-01), Forford
patent: 5808844 (1998-09-01), Schiel et al.
patent: 6442010 (2002-08-01), Kasztenny et al.
patent: 6483680 (2002-11-01), Kulidjian et al.
patent: 6625551 (2003-09-01), Gies et al.
patent: 44 36 254 (1996-02-01), None
Mahnert Hartmut
Nibler Josef
Leja Ronald
Siemens Aktiengesellschaft
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