Loadshedding uninterruptible power supply
First Claim
1. A system for use in supplying power to an electrical device fitted with power couplings for use in establishing contact with a first power source and a second power source in a normal operational state, comprising:
- an uninterruptible power supply in line between the second power source and the electrical device, the uninterruptible power supply not being in line between the first power supply and the electrical device;
a switch for permitting the electrical device to consume power from a member of the group consisting of the first power source, the second power source, and combinations thereof;
a first sense circuit for identifying a power failure condition in the first power source;
a second sense circuit for identifying a power failure condition in the second power source; and
a controller configured with control circuitry and logic and responsive to said first and second sense circuits to implement instructions to said switch for a plurality of operational states based upon a sensed power failure condition.
3 Assignments
0 Petitions
Accused Products
Abstract
A dual power source system includes a first power source and a second power source operably coupled with an electrical device, as well as a switching mechanism capable of selecting between the first and second power sources. An uninterruptible power supply (UPS) is place in line with one of the first and second power sources leading to the electrical device. Sense circuitry is capable of identifying a power failure condition in either the first or second power sources. A controller utilizes signals from the sense circuitry to selectively switch between the first and second power sources while configuring the UPS in a manner of providing for a plurality of operational states that accommodate the electrical device with operational power despite any combination of power failures in the first and second power sources.
31 Citations
13 Claims
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1. A system for use in supplying power to an electrical device fitted with power couplings for use in establishing contact with a first power source and a second power source in a normal operational state, comprising:
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an uninterruptible power supply in line between the second power source and the electrical device, the uninterruptible power supply not being in line between the first power supply and the electrical device;
a switch for permitting the electrical device to consume power from a member of the group consisting of the first power source, the second power source, and combinations thereof;
a first sense circuit for identifying a power failure condition in the first power source;
a second sense circuit for identifying a power failure condition in the second power source; and
a controller configured with control circuitry and logic and responsive to said first and second sense circuits to implement instructions to said switch for a plurality of operational states based upon a sensed power failure condition. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer readable form use in adapting a system for use in supplying power to an electrical device fitted with power couplings for use in establishing contact with a first power source and a second power source in a normal operational state, where the system design includes:
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an uninterruptible power supply in line between the second power source and the electrical device, the uninterruptible power supply not being in line between the first power supply and the electrical device;
a switch for permitting the electrical device to consume power from a member of the group consisting of the first power source, the second power source, and combinations thereof;
a first sense circuit for identifying a power failure condition in the first power source;
a second sense circuit for identifying a power failure condition in the second power source; and
a controller;
the computer readable form comprising machine instructions for inducing a plurality of operational states based upon sensed power failure conditions. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of operating a system in a plurality of operational states based upon sensed power failure conditions, where the system includes
an uninterruptible power supply in line between a second power source and an electrical device, the uninterruptible power supply not being in line between a first power supply and the electrical device; -
a switch for permitting the electrical device to consume power from a member of the group consisting of the first power source, the second power source, and combinations thereof;
a first sense circuit for identifying a power failure condition in the first power source;
a second sense circuit for identifying a power failure condition in the second power source; and
a controller;
the method comprising the steps of operating in a first power source failure state occurring when the first sense circuit senses a power failure condition in the first power source and the second sense circuit does not sense a power failure condition in the second power source, whereupon the switch selects the second power source to provide power to the electrical device, operating in a second power source failure state occurring when the second sense circuit senses a power failure in the second power source and the first sense circuit does not sense a power failure condition in the first power source, whereupon the switch selects the first power source to provide power to the electrical device and the uninterruptible power supply remains available to provide power if the first sense circuit senses a future power failure condition in the first power supply; and
operating in a dual source failure state occurring when the first sense circuit senses a power failure condition in the first power supply and the second sense circuit senses a power failure condition in the second power supply, whereupon the uninterruptible power supply provides power to the electrical device while the electrical device proceeds with an orderly shutdown.
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Specification