The lamp wattage can be reduced by operating the ballast at a higher impedance value, higher than the rated value. The lamp manufacturer´s specifications must be observed in doing so to avoid shortening the lamp´s service life. The lamps should be started at the ballast´s rated impedance and only switched down to reduced operation after a period of at least five minutes.
The impedance value can be altered by using an additional ballast (high-effort option) or by using a switchable ballast (low-cost option). These ballast models can be switched using either a modern, time-controlled electronic power reduction switch, which is equipped with an additional control conductor (230 V), or a power reduction switch with a constant incentive rate setting (no control conductor).
The construction of power reduction switches with control conductors differs according to the selected increase in impedance. PW devices are suitable for additional ballasts and PU devices for switchable ballasts.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment