Drive identity and frame size
The ABB 3BBR0000107991 is an ACS880-01-017A-3 AC drive in Frame Size R2. The R2 frame tells you the physical envelope and mounting footprint — it determines the DIN-rail or backplate space you need to reserve in the panel, and it governs which optional kits (braking chopper, EMC filter, I/O extensions) physically fit the chassis.
What the frame size governs in a panel
Frame Size R2 on the ACS880-01 series defines the mechanical interface: the mounting hole pattern, the gland-plate entry for power and control cables, and the clearance needed for airflow. If you are swapping an existing drive or laying out a new cabinet, the R2 frame tells you the heat sink depth and the minimum free air space above and below the unit for convection cooling. The same R2 chassis is shared across a current range within the series, so the physical integration step is consistent even if the drive rating changes.