| 摘要 |
<p>A live AC mains power selector for a disk storage system (60) having electrical redundancy comprises first (10) and second (15) AC mains, first (45), second (50) and third (55) power supplies, and switching means (65). The first and second power supplies (45,50) are connected, respectively, to the first and second AC mains (10,15). The switching means (65) is powered by the first AC main (10) and connects the first AC main to the third (redundant) power supply (55) in the event the first AC main is energized. The switching means (65) automatically connects (70) the second AC main (15) to the third power supply (55) in the event the first AC main (10) 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 (95), 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. <IMAGE></p> |
