Circuit for starting and operating fluorescent lamps

Details Circuit for starting and operating fluorescent lamps Circuit for starting and operating fluorescent lamps

H - Electricity

05

B

315/36

H05B 41/18 (2006.01) H05B 41/04 (2006.01) H05B 41/232 (2006.01) H05B 41/36 (2006.01)

Patent

CA 1189133

CIRCUIT FOR STARTING AND OPERATING FLUORESCENT LAMPS ABSTRACT OF THE DISCLOSURE A circuit for starting and operating fluorescent lamps from an a c power source, comprising reactive ballast means connected to ballast the lamps and having a non-linear characteristic for producing harmonics of the power source frequency, and a capacitor and a cathode heating transformer connected in series and connected to receive power from said ballast means and resonant in a frequency range including two or more of said harmonics. A switch may be connected in series with the capacitor and cathode heating transformer for opening the cathode heating circuit when the lamps are operating, to conserve electrical energy.

404495

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