The ABB ACS355-03U-23A1-4 is a General Machinery Drive from the ACS355 family, rated for 480 V AC three-phase input. It's the kind of drive you'd spec into a conveyor, a pump, a fan, or a small mixer — general-purpose variable-speed control for induction motors up to the current rating of the unit. The 480 V AC line voltage is common in North American industrial plants, so this fits right into a standard 480 V three-phase panel without a transformer.
The headline number here is the 480 V AC input rating. That tells you the drive is designed for a 480 V three-phase supply — typical for a 460–480 V motor. The '23A1' in the order code corresponds to the output current rating (23.1 A), which is what you match to the motor full-load amps. If your motor draws 23 A or less at 480 V, this drive handles it. The ACS355 family is a compact, panel-mount design, so it fits in a standard enclosure without a lot of extra space.