Power Break I to Power Break II Retrofill Solution

This document describes ABB's engineered retrofill solution for replacing obsolete Power Break I (PB1) circuit breakers with upgraded Power Break II (PB2) models, including necessary modifications and field engineering support. It highlights the benefits of OEM knowledge, minimal downtime, UL/CSA certification, and key features of PB2 breakers such as compact design, field-upgradeable trip units, and optional accessories.