Electricity: electrical systems and devices – Safety and protection of systems and devices – Series connected sections with faulty section disconnect
Patent
1984-12-17
1986-05-27
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Series connected sections with faulty section disconnect
361 78, 361 66, 455135, 455136, H02H 300
Patent
active
045919402
ABSTRACT:
A signal quality monitor, and a protective relay system using the monitor, which utilizes both AC and DC signals from the receiver agc stage to monitor a plurality of different signal parameters. A signal responsive to the noise in the communication channel which transmits at least one of the protective relay signals used in a protective relay comparison function, is also used in the trip circuits of the associated circuit interrupter to continuously adapt or modify the trip level in response to channel noise.
REFERENCES:
patent: 3707651 (1972-12-01), Lensner et al.
patent: 4056838 (1977-11-01), Leib
patent: 4071873 (1978-01-01), Andow et al.
McGivern James P.
Sun Shan C.
DeBoer T.
Pellinen A. D.
Westinghouse Electric Corp.
Zitelli W. E.
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