Nested redundant uninterruptible power supply apparatus and...

Details Nested redundant uninterruptible power supply apparatus and... Nested redundant uninterruptible power supply apparatus and...

2006-11-20

2009-12-29

Fleming, Fritz M (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

C307S064000

Reexamination Certificate

active

07638899

ABSTRACT:
An uninterruptible power supply (UPS) system includes at least three UPSs configured to be connected in parallel to a common load. The system further includes control circuitry configured to support at least two redundant groups among the UPSs and to support at least two redundant subgroups among at least one of the redundant groups of UPSs. In this manner, a nested redundancy may be provided.

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