What you're actually sourcing
The ABB ACS880-01-302A-5 is the 302 A frame in the ACS880-01 wall-mount drive family, catalogued as a Motor Drive under Motors & Motor Controls. The frame rating is the headline number a panel builder keys on, because it sets the SCCR headroom and the busbar landing on the cabinet floor. At 90.72 kg the unit sits in the bracket where two people and a hoist stop being optional — wall-mount footprint stays compact, but the mass governs rigging and the cabinet's load rating. Mount it where the panel builder can land cabling straight in and the cooling airflow has the clearance the ACS880 frame expects; the backplane of the series is direct-to-wall, not drawer-style, so the panel space you allocate is the footprint it keeps.