H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/282 (2006.01) H05B 41/29 (1990.01)
Patent
CA 2133564
ABSTRACT A plurality of electric discharge lamps, or fluorescent lamps, connected in series, are fed at the startup with a variable voltage having a frequency that is varied, during a preset time period, between preset extreme values, respectively a minimum value, and a maximum value, so as to cause the startup of the lamps with a convenient voltage value. Subsequently the lamps are fed with constant current having nominal frequency.
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O.c.e.m. S.p.a.
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