Rate sensing instantaneous trip mode network

Details Rate sensing instantaneous trip mode network Rate sensing instantaneous trip mode network

1979-09-04

1981-10-27

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 96, H02H 308

Patent

active

042977410

ABSTRACT:
Air core current transformers respectively linked with the phase conductors of a power distribution circuit develop secondary voltage signals proportional to the rates of change of the phase currents. A full-wave rectifying network provides a rectified output voltage signal corresponding to the highest magnitude secondary voltage signal. A comparator issues a circuit breaker trip initiating signal when the output voltage signal achieves a pre-selected threshold voltage.

REFERENCES:
patent: 3846675 (1974-11-01), Shimp

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