Power control circuit with phase controlled signal input

Details Power control circuit with phase controlled signal input Power control circuit with phase controlled signal input

H - Electricity

05

B

318/120, 315/44

H05B 41/392 (2006.01) H05B 39/08 (2006.01)

Patent

CA 1321236

ABSTRACT OF THE DISCLOSURE One or more power dimmers have a preshaped phase controlled input signal connected to their con- trol input. The preshaped phase controlled input sig- nal is generated from the output of a master dimmer having conventional phase control circuits operated from a manual or other control. A relay having con- tacts in the output circuit of the power dimmers is opened in response to the reduction of the phase con- trolled input signal to a value less than a given val- ue. In an alternative embodiment, the power dimmers are replaced by an interface circuit which produces a variable frequency, pulse width modulated or other sig- nal.

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