S 750 DR Selective Main Circuit-Breaker Data Sheet

This document is a data sheet for ABB’s Selective Main Circuit-Breakers (SMCB) of the S 750 DR series, which provide current-limiting selectivity and voltage-independent operation for high-availability energy distribution systems. It details their features, such as 25 kA short-circuit breaking capacity, lockable isolation, and suitability for selective overcurrent protection in main distribution boards, meter boards, and critical applications like hospitals and data centers.