Reception of protection commands in a remote tripping device

Details Reception of protection commands in a remote tripping device Reception of protection commands in a remote tripping device

2005-08-30

2005-08-30

Horabik, Michael (Department: 2635)

Communications: electrical

Selective

Monitoring in addition to control

C340S003800, C340S644000, C361S062000, C361S066000, C361S068000

Reexamination Certificate

active

06937134

ABSTRACT:
In order to receive protection commands in a remote tripping device, one or more signals is or are received, protection commands and combinations of protection commands are coded by means of an individual signal or by means of a predetermined combination of signals, and each protection command is allocated a predetermined minimum safety and/or security value. In this case, each signal is allocated a detector (41, 42, 43, 44, 45) which detects the presence of the signal on the basis of at least two different safety and/or security values which can be predetermined, and a protection command is detected with an allocated minimum safety and/or security value if an individual signal, which codes the protection command individually or in conjunction with other protection commands, is detected with a safety and/or security threshold value which is greater than or equal to the minimum safety and/or security value allocated to that protection command, or if all the signals in a combination of signals which codes the protection command individually or in conjunction with other protection commands are in each detected with a safety and/or security threshold value which is greater than or equal to the minimum safety and/or security value allocated to the protection command.

REFERENCES:
patent: 4203142 (1980-05-01), Lee
patent: 5038246 (1991-08-01), Durivage, III
patent: 5220479 (1993-06-01), Fraisse
patent: 5524083 (1996-06-01), Horne et al.
patent: 5793750 (1998-08-01), Schweitzer, III et al.
patent: 5875087 (1999-02-01), Spencer et al.
patent: 6067218 (2000-05-01), Suptitz
patent: 6141202 (2000-10-01), Maeckel et al.

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