Load control system for standard electric utility meter
First Claim
1. An automatic load control system for electric utility meter connected to a primary power source, comprising, in combination:
- first means to convert the primary power available from said utility meter into digital timing pulses and a source of secondary power for load control subsystems;
second means deriving power from said secondary source and effective to monitor primary power consumption and to generate a plurality of digital meter pulses with each pulse representing a predetermined quantity of said primary electric power consumed;
third means comprising a digital circuit accepting said timing pulses and secondary power from said first means and digital meter pulses from said second means effective to determine a digital measure of the rate at which meter pulses are generated and on comparison of said digital measure to a pre-set digital threshold to generate a digital load control command signal when said threshold is exceeded, said signal having a preselected frequency code;
fourth means comprising wireless data carrier link transmitter effective to transmit said load command signal generated by said third means to a remote control point; and
,fifth means comprising a wireless receiver having one or more switching units located at said remote control point responsive to the frequency code of said load commands transmitted over said data link of said fourth means to provide one or more preselected switching functions.
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Accused Products
Abstract
An automatic load control system for electric utility meters which includes an electric meter monitoring device which converts meter wheel revolutions into electronic digital pulses representing a known quantity of power consumption and a digital circuit which determines meter pulse rate or electric power demand and generates load control commands when predetermined demand levels are exceeded. Commands are transmitted from the monitoring device to a remote load control point by a data link to deactivate specific loads during periods of peak demand. Commands are also transmitted to selected remote locations for the purpose of switching indicator lights and alarms in order to display demand status to the power consumer.
74 Citations
15 Claims
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1. An automatic load control system for electric utility meter connected to a primary power source, comprising, in combination:
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first means to convert the primary power available from said utility meter into digital timing pulses and a source of secondary power for load control subsystems; second means deriving power from said secondary source and effective to monitor primary power consumption and to generate a plurality of digital meter pulses with each pulse representing a predetermined quantity of said primary electric power consumed; third means comprising a digital circuit accepting said timing pulses and secondary power from said first means and digital meter pulses from said second means effective to determine a digital measure of the rate at which meter pulses are generated and on comparison of said digital measure to a pre-set digital threshold to generate a digital load control command signal when said threshold is exceeded, said signal having a preselected frequency code; fourth means comprising wireless data carrier link transmitter effective to transmit said load command signal generated by said third means to a remote control point; and
,fifth means comprising a wireless receiver having one or more switching units located at said remote control point responsive to the frequency code of said load commands transmitted over said data link of said fourth means to provide one or more preselected switching functions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification