Importance

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Abstract

A system for controlling electrical load shedding and restoring operations includes a microprocessor system, a power measuring circuit, and a plurality of load switching relays controlled by the microprocessor system to electrically connect controlled loads of a residence to, and electrically disconnect the controlled loads from, a power line in accordance with priorities associated with the controlled loads. The system is operated to electrically disconnect or shed, in order of increasing priority, as many of the controlled loads as is necessary to cause the total power delivered to the residence to be less than a selected power limit, to compute power availability numbers which represent amounts of power which can be additionally consumed by the residence without exceeding the selected power limit, to restore, in order of decreasing priority, as many previously shed controlled loads as possible without exceeding the selected power limit, and to shed, in order of increasing priority, as many controlled loads presently electrically connected to the power line as is necessary to allow restoring of higher priority, previously shed controlled loads. The selected power limit is manually settable by means of a switch which is read by the microprocessor system.

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First Claim