S 200 UDC Miniature Circuit Breaker Installation Guide

This document details the S 200 UDC series of miniature circuit breakers (MCBs) from ABB, designed for DC applications with voltage ratings up to 125 V DC (1-pole) or 250 V DC (2-pole) and interrupting capacity of 14 kA per UL 489. It covers installation polarity requirements, permissible voltage configurations between conductors and earth, and circuit layouts for 1-pole and 2-pole versions.