The ABB 3AXD50000705603 is a LV AC packaged drive with disconnect and fuses, built for 3-phase 440... 480 V input at 50/60 Hz. Under UL light-overload use it delivers 60 Hp at 77 A output current. NEMA Type 3R enclosure is rain-tight and sleet-resistant, but not submersible.
The 77 A light-overload rating is the number that decides the motor size you can hang on it — 60 Hp at 460 V is the UL ceiling. Light-overload means continuous duty at that current; if your application cycles hard or needs short-term overload headroom, check the heavy-overload curve (not listed here, but standard for this drive family). The 440... 480 V input range covers 460 V nominal North American supplies. 50/60 Hz is fine for either power grid — no derating needed between the two.