ABB SACE Emax 2 ZSI Main-Tie-Main Application Guide

This document explains how ABB SACE Emax 2 circuit breakers operate with 24V Zone Selective Interlocking (ZSI) logic in a Main-Tie-Main configuration, detailing restraint signal behavior, time delay settings, and the role of the tie-breaker (CB5) with AUP signaling contacts. It covers fault scenarios, performance specifications, and advanced control functions such as Load Shedding, Power Controller, and Adaptive Protection.