Constant wattage autotransformer. A type of H.I.D. ballast in which the primary and secondary coils are electrically connected. Considered an appropriate balance between cost and performance.
Constant Wattage Autotransformer. A lead style ballast with the capacitor in series with the lamp.
Constant Wattage Autotransformer - A type of Metal Halide Control Gear which requires no Ignitor and is generally very reliable. Only Lamps designed to operate with CWA gear should be used on such Luminaires. Standard Metal Halide Lamps run on Reactor Control Gear and should not be used with CWA equipment.