Live AC mains power selector for redundant systems

Details Live AC mains power selector for redundant systems Live AC mains power selector for redundant systems

1996-09-25

1999-06-29

Paladini, Albert W.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 66, 307 29, 307 80, 361187, 365226, 365229, 39575001, H02J 906

Patent

active

059172533

ABSTRACT:
A live AC mains power selector for a disk storage system having electrical redundancy comprises first and second AC mains, first, second and third power supplies, and switching means. The first and second power supplies are connected, respectively, to the first and second AC mains. The switching means is powered by the first AC main and connects the first AC main to the third (redundant) power supply in the event the first AC main is energized. The switching means automatically connects the second AC main to the third power supply in the event the first AC main is de-energized. In alternate embodiments, all three power supplies remain operational in the event of a failure of the first AC main. With the addition of a second switching means, all three power supplies remain operational in the event of a failure of either AC main. In yet further alternate embodiments, a live AC mains selector is included in a system having equal inputs and outputs.

REFERENCES:
patent: 3818237 (1974-06-01), Straw
patent: 3835333 (1974-09-01), Balan
patent: 3949238 (1976-04-01), Brookes
patent: 4356402 (1982-10-01), Morimoto et al.
patent: 4659942 (1987-04-01), Volp
patent: 5638295 (1997-06-01), Lagree et al.

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