| 摘要 |
A microprocessor controlled system is provided for supplying electrical power to a plurality of electrical outlets for example for use in a parking lot. A central power supply communicates with a series of outlet receptacles each arranged to supply electrical power. Each receptacle has its own microprocessor controlled control unit which is arranged to control the supply of power to the receptacle. A detector unit detects the insertion of a connector plug to the receptacle and actuates a comparator which compares the instantaneous current drawn by the load with a predetermined variable maximum current and allows that current to be drawn only if it is less than the maximum. In the event that the maximum is exceeded, the load is disconnected and is only allowed to be reconnected after the connector plug is removed. A thermostat can be used to control the supply of power depending upon the outside temperature. The microprocessors can select a part only of a cycle for supplying power so that the total power drawn by the central power supply is reduced.
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