Undervoltage protection device

Details Undervoltage protection device Undervoltage protection device

1977-06-22

1978-09-26

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

340663, H02H 324

Patent

active

041175263

ABSTRACT:
A circuit for protecting electrical apparatus from undervoltage of a source voltage by providing disconnection of the apparatus from the same. The circuit includes a relay controlled by a transistorized portion of the circuit responsive to conduction of a gas-discharge tube having specific breakdown and extinguishing voltage characteristics. The tube senses a voltage of that portion of the circuit having selectively adjustable A.C. and D.C. components proportionate to the source voltage, wherein a plurality of source voltage differentials can be selectively chosen at which connection and disconnection of the apparatus will be effected. The relay is also coupled to a capacitor to provide a time delay to prevent relay operation upon momentary voltage fluctuations.

REFERENCES:
patent: 3518544 (1970-06-01), Tachick
patent: 3718839 (1973-02-01), Conti et al.
patent: 4024438 (1977-05-01), Priegnitz

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