Operating device for discharge lamps having a preheating device

Details Operating device for discharge lamps having a preheating device Operating device for discharge lamps having a preheating device

H - Electricity

05

B

H05B 41/14 (2006.01) H05B 41/295 (2006.01)

Patent

CA 2415512

The invention relates to an operating circuit for a low-pressure discharge lamp LP, in which the lamp electrodes can be preheated by means of a resonant circuit C14, T11. In order to determine the resonant frequency accurately and to establish the lamp type being used, a frequency range is moved through at the start of operation and the voltage is measured on a primary winding T11 of a preheating transformer.

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