What this part is
The ABB ACS800-104-0260-3+V991 is a cabinet-format AC inverter drive from the ABB ACS800 series, filed in the Motor Drives line — the liquid-cooled / cabinet-class member of the ACS800 family used in industrial motor control. Drives of this class take a fixed AC mains input and deliver variable-frequency output to a three-phase induction or PM motor; the cabinet form factor absorbs the line-side filtering, DC-link stage, and output inverter in a floor-standing enclosure. On the spec record the unit carries a cabinet mass of 58.97 kgs, which is the rating that governs the lifting plan and the panel-room floor loading for an install — a single-rigger lift is not realistic at this mass, so plan a pallet jack or hoist into the cabinet bay.
Panel-side fit notes
At a cabinet mass of 58.97 kgs the ACS800-104-0260-3+V991 needs a verified floor-loading check on the panel-room slab and a lifting fixture or hoist on the install — this is the one figure on the record that actually drives site handling for the unit. Cabinet-class ABB drives in this slot are typically front-access for cabling and bottom-entry for the motor and supply cables; verify the gland-plate pattern against the install drawing before lifting the unit into the bay, because the cabinet footprint in the ACS800-104 generation is not the same envelope as the later ACS880 cabinet builds.
Where this class of part sits against same-family peers
The ACS880-01-156A-5 is the cabinet-class successor in the ACS880 line; the ACS580-01-180A-4 is the general-purpose member of the newer ACS580 family. Both weigh 55.00 kgs and 54.43 kgs, several kilograms under this unit at 58.97 kgs, but neither shares the ACS800-104 cabinet footprint or legacy control terminal map.