Dual processor electric power trip unit

Details Dual processor electric power trip unit Dual processor electric power trip unit

1991-08-30

1994-05-10

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 96, 361 87, H02H 308

Patent

active

053113926

ABSTRACT:
A low voltage electric power monitoring and circuit breaker system includes two processors. The first processor activates the circuit breaker when an overcurrent condition is detected and the second processor monitors the current sensed by the first processor and activates the circuit breaker for overcurrent conditions which should have caused the first processor to activate the breaker. If a current of this magnitude is detected, the second processor activates the circuit breaker as a backup protection for the first circuit breaker.

REFERENCES:
patent: 4470092 (1984-09-01), Lombardi
patent: 4689712 (1987-08-01), Demeyer
patent: 4710845 (1987-12-01), Demeyer
patent: 4811154 (1989-03-01), Trenkler et al.
patent: 4870351 (1989-09-01), Milkovic
patent: 4996646 (1991-02-01), Farrington
patent: 5031178 (1991-07-01), Hartman

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