Power supply protection circuit

Details Power supply protection circuit Power supply protection circuit

2005-12-06

2005-12-06

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

Reexamination Certificate

active

06972940

ABSTRACT:
A power supply protection circuit for stopping a power supply to electrical equipments in case a normal power voltage is not outputted from a direct current power supply and an excess voltage or a reduced voltage is outputted. The power supply protection circuit according to the present invention is constituted of a power source line for supplying a direct current power, via relay contacts of a relay, to an electrical equipment, a first circuit for detecting an excess voltage and a reduced voltage, a second circuit, and a relay operation circuit.

REFERENCES:
patent: 3146358 (1964-08-01), Pratt
patent: 3311907 (1967-03-01), Teal
patent: 3317792 (1967-05-01), Sutherland
patent: 3317793 (1967-05-01), Peek et al.
patent: 63-66028 (1988-05-01), None
patent: 5-23747 (1993-03-01), None
patent: 5-70143 (1993-09-01), None
patent: 8-19167 (1996-01-01), None

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