Electricity: electrical systems and devices – Safety and protection of systems and devices – Feeder protection in distribution networks
Patent
1981-06-18
1983-10-11
Salce, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Feeder protection in distribution networks
361 67, 361 86, 371 16, 307 76, 307 84, 307 86, 364480, 364483, 364493, 364186, H02H 726
Patent
active
044096356
ABSTRACT:
A high reliability electrical power system is provided with a microprocessor-based control unit which maintains power output and performs control functions for the system which is driven by the power system. A self locking feature prevents the transmission of potentially erroneous control signals if a component of the system being controlled or the control unit fails. The control unit conducts a series of self-test routines which result in the generation of digital key words. If the correct key words are generated and the other circuits of the control unit are operating properly, the control unit output remains operative. If the self test routines detect a failure in the system being controlled or the control unit or if a failure occurs in one of the control unit output circuits, the control unit output is locked into a predetermined state.
REFERENCES:
patent: 3609312 (1971-09-01), Higgin et al.
patent: 3723750 (1973-03-01), Dixon et al.
patent: 3829842 (1974-08-01), Langdon et al.
patent: 3842249 (1974-10-01), Geyer et al.
patent: 4090090 (1978-05-01), Johnston
patent: 4107253 (1978-08-01), Borg et al.
patent: 4263580 (1981-04-01), Sato et al.
patent: 4275311 (1981-06-01), Agazzone et al.
Lenart R. P.
Salce Patrick R.
Westinghouse Electric Corp.
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