What this order code covers
The 3BBR0000115111 is the ordering code for an ABB ACS880-01-271A-7 drive in Frame Size R9. That frame size tells you the mechanical envelope and the bus-bar layout — R9 is a larger cabinet-mount frame, so plan panel space accordingly.
What the frame size means for fit
Frame R9 defines the physical dimensions, mounting hole pattern, and bus-bar connections. Swapping from an R8 or smaller means a different footprint and gland-plate layout.