| 摘要 |
An electronic ballast for at least one gas discharge lamp (LA), preferably for a fluorescent tube, having a rectifier circuit ( 2 ) connectable to a supply voltage source, a smoothing circuit ( 3 ) connected to the output of the rectifier circuit ( 2 ) for generating an intermediate circuit voltage (UZ), and an inverter ( 4 ), fed with the intermediate circuit voltage (UZ), to the output of which a terminal for the load circuit ( 5 ) containing the lamp (LA) is connected, and an overvoltage monitoring device which monitors the supply voltage (U 0 ) delivered to the electronic ballast, whereby in the event that the supply voltage exceeds a predetermined nominal value (Ui,max), an optically or acoustically perceptible warning signal is issued.
|
