초록 ▼

To enable a consumer of electrical energy to effect control of total energy consumption by various individual appliances and loads, each individual load has a control unit, conveniently in a plug top, which responds to pulses broadcast on the power supply wiring in the form of short duration interru

To enable a consumer of electrical energy to effect control of total energy consumption by various individual appliances and loads, each individual load has a control unit, conveniently in a plug top, which responds to pulses broadcast on the power supply wiring in the form of short duration interruptions of the waveform. At each appliance a microprocessor unit counts the number of successive pulses in a predetermined time interval and operates an electronic switch if the received count reaches a predetermined number, which may be different for different loads thereby enabling selective control of the loads. Provision is made for automatic restoration of supply if the overall energy consumption falls. Provision can also be made for automatic resumption of supply after a predetermined time interval.

대표청구항 ▼

A method of controlling loads within the premises of consumers on an alternating electrical power supply system in accordance with the demand of those loads comprising the steps of monitoring the demand of the system for electrical power, in response to detection of power demand by the system in exc

A method of controlling loads within the premises of consumers on an alternating electrical power supply system in accordance with the demand of those loads comprising the steps of monitoring the demand of the system for electrical power, in response to detection of power demand by the system in excess of a preset amount opening the supply circuit for a short duration less than one cycle of the supply frequency and so modifying the alternating waveform of the supply to provide detectable and distinguishable control signals, and at each individual load to be controlled, detecting the control signals, selecting from the detected control signals at least one control signal and controlling the supply to such individual load in response to the selected signal.