Device for operating discharge lamps

Details Device for operating discharge lamps Device for operating discharge lamps

H - Electricity

05

B

H05B 41/36 (2006.01) H05B 41/295 (2006.01)

Patent

CA 2448791

A device for operating a plurality of discharge lamps (71, 72) is to be fashioned cost effectively. Two lamps (71, 72) are therefore operated in a single load circuit. In the preheating phase, the incandescent filaments (711, 712, 721, 722) are supplied with preheating current either directly or via a transformer (Ls, Lp). The preheating current is controlled via a temperature-dependent resistor (PTC) in such a way that the continuous heating current is greatly reduced over all the filaments during the operation of the lamp.

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