Electricity: measuring and testing – Electromechanical switching device
Reexamination Certificate
2006-09-21
2010-11-16
Nguyen, Vincent Q (Department: 2831)
Electricity: measuring and testing
Electromechanical switching device
C361S042000, C361S093100
Reexamination Certificate
active
07834633
ABSTRACT:
There is described a method and a system for monitoring a protective apparatus, which is connected upstream of a switching device and is connected to the switching device via at least one main current path. The wiring complexity for monitoring of the protective apparatus is minimized. This is achieved by virtue of the fact that the sate of the protective apparatus is determined by a tap of the at least one main current path at or in the switching device by means of an evaluation unit. As a result of this direct evaluation of the switching state of the protective organ on the switching device, the wiring which until now has been required for an addition auxiliary switch on the protective device is dispensed with a possible fault source also being minimized along with the wiring complexity. For this purpose, the proposed solution is also independent of the physical design (branch-oriented or row-oriented, distance between the devices) in a switchgear cabinet.
REFERENCES:
patent: 6724597 (2004-04-01), Elischer et al.
patent: 6738246 (2004-05-01), Strumpler
patent: 29 20 188 (1980-03-01), None
patent: 100 40 633 (2002-03-01), None
Hartinger Peter
Keil Rainer
Schatz Wolfgang
Nguyen Vincent Q
Siemens Aktiengesellschaft
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