Undervoltage release with electrical reset for circuit breaker

Details Undervoltage release with electrical reset for circuit breaker Undervoltage release with electrical reset for circuit breaker

1976-02-23

1977-03-08

Moose, Harry

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit automatically reconnected only after the fault is...

361 92, H02H 306, H02H 324

Patent

active

040114848

ABSTRACT:
An undervoltage circuit having a power supply voltage level detector, a reset circuit, and a hold-in circuit. The level detector of the circuit causes an undervoltage coil to trip a circuit breaker when the power being supplied falls below a predetermined voltage level. When power is restored, an automatic reset circuit resets the circuit breakers undervoltage coil at a preset voltage level by applying a repetitive pulse to the coil. The hold-in circuit applies a continuous current to the same coil of the undervoltage circuit to hold it in once it has been reset.

REFERENCES:
patent: 3537757 (1970-11-01), Griffin
patent: 3657603 (1972-04-01), Adams
patent: 3715742 (1973-02-01), Schweitzer

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