Method and apparatus for providing uninterruptible power

Details Method and apparatus for providing uninterruptible power Method and apparatus for providing uninterruptible power

2004-08-31

2008-11-25

Sherry, Michael J (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

Reexamination Certificate

active

07456518

ABSTRACT:
Methods and apparatus for providing uninterruptible power are provided by aspects of the invention. One aspect is more particularly directed to an uninterruptible power supply for providing power to a load. The uninterruptible power supply includes an input to receive input power, an output to provide output power, a back-up power source coupled to the output to provide backup power at the output, a contactor coupled to the input and having an open state and a closed state, a contactor control circuit having an output coupled to the contactor to provide an output voltage to control an operational state of the contactor, the contactor control circuit being configured to provide an output voltage having a first voltage level to the contactor to control the contactor to switch from the open state to the closed state and to provide a second output voltage having a second voltage level to maintain the contactor in the closed state.

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