Controller for controlling operation of at least one electrical load operating on an AC supply, and a method thereof
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United States of America Patent
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Aug 15, 1995
Grant Date -
N/A
app pub date -
Nov 13, 1992
filing date -
Nov 13, 1992
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A controller is provided for controlling operation of at least one electrical load operating on an AC supply having a typical frequency, the AC supply being provided via power transformers by an electrical power distribution grid. The controller is associated with the load and comprises an input interface for coupling the controller to the grid, a frequency detector for detecting the frequency of the AC supply and producing a signal indicative of the frequency, memory modules for storing preprogrammed commands, a frequency monitor for reading the signal indicative of the frequency and producing frequency data derived thereof, a selector for selecting at least one of the preprogrammed commands with respect to the frequency data, a control unit for producing at least one command signal representative of the selected preprogrammed commands, and an output interface including a device responsive to the command signal for controlling the load. Therefore, the load can be controlled by means of the controller depending on the frequency of the AC supply.
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