Philips Advance 71A5590 Autotransformer Ballast is a lighting ballast that regulates current for compatible luminaires powered from a 277V supply. It is rated for 277V, 60 Hz operation with a ballast current of 1.80 A. Designed for fixtures that require an autotransformer ballast, this unit provides the appropriate impedance to drive the specified lamps in 277V electrical environments.
