The ABB ACS550-U1-06A9-4 is a discontinued AC drive from the ACS550 series, designed for US installation with NEMA compliance. This 3-phase drive operates at 380-480VAC with 50/60Hz frequency, delivering 6.9A current and 3KW power output. It features UL Type/NEMA 1 enclosure and has been replaced by the newer ACS580-01-07A6-4 model.