The ABB XT7LU312EEFF00NXXX is a 1200 A, 3-pole molded-case circuit breaker from the XT7L series, fitted with an EKIP DIP LS/I electronic trip unit and fixed front terminals (FF).
The 1200 A frame and 3-pole configuration govern the bus-bar drilling pattern and enclosure cutout — this is a large-frame MCCB that occupies a full three-pole mounting footprint, typically on a DIN-rail adapter plate or direct bolted to a switchboard bus. The EKIP DIP LS/I trip unit provides long-time (L), short-time (S), and instantaneous (I) protection curves, adjustable via DIP switches on the front face. That means the breaker can be coordinated downstream of a larger feeder or upstream of smaller branch breakers without changing the trip unit hardware. The fixed front terminals (FF) accept standard cable or bus-bar connections; no plug-in base is involved, so the installer terminates directly to the breaker lugs.