Two-wire ballast for fluorescent tube dimming

Details Two-wire ballast for fluorescent tube dimming Two-wire ballast for fluorescent tube dimming

H - Electricity

05

B

315/29

H05B 41/38 (2006.01) H05B 41/392 (2006.01)

Patent

CA 1106908

ABSTRACT A two-wire ballast arrangement is disclosed for fluorescent tubes having first and second terminals for supplying variable power to dim the fluorescent tube, a choke coil connected between the first terminal and the fluorescent tube and a filament transformer having a primary connected between the second terminal and a tap on the choke coil, the tap being selected to supply substantially constant voltage to the primary winding, the transformer having secondary windings to supply filament voltage to the fluor- escent tube.

276641

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