The ABB 3AXD50000705887 is a factory-assembled LV AC packaged drive — the ACQ580-PC-027A-4+B058 — that ships with an integral circuit breaker and fuse, so it lands as a single line-up item for a 20 Hp motor on a 460 V three-phase supply. The 27 A light-overload UL rating tells you it carries the motor through normal running without nuisance tripping; the integrated breaker and fuse save panel space and wiring time compared to a separate drive-and-protection stack.
Input voltage range is 440 to 480 V, 3-phase, 50/60 Hz. That locks it into 460 V class systems — common in North American industrial mains. The 27 A light-overload output is the figure to match against your motor FLA; if the motor draws more than 27 A at full load, this drive won't hold it through a normal duty cycle.