Self-monitoring digital solid-state trip release

Details Self-monitoring digital solid-state trip release Self-monitoring digital solid-state trip release

1987-07-23

1988-10-25

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 93, H02H 3093

Patent

active

047807873

ABSTRACT:
The digital solid-state trip release is equipped with a watch-dog which monitors the periodic running of the information processing controlled by the microprocessor. When a disturbance or a delay occurs in the periodic cycle, the watch-dog first emits a reinitialization order applied to the microprocessor input to attempt to rerun the periodic cycle. If this attempt is unsuccessful, the watch-dog emits a circuit breaker tripping order.

REFERENCES:
patent: 4476423 (1984-10-01), Mallixk et al.
patent: 4476511 (1984-10-01), Saletta et al.
patent: 4535409 (1985-08-01), Jindrick et al.
Siemens Power Engineering, vol. 6, No. 1, pp. 50-51, 1984.

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