OneFit Hard Bus Retrofill for GE MagneBlast Switchgear

This document describes ABB’s OneFit hard bus retrofill solution, which modernizes aging GE MagneBlast vertical lift switchgear by replacing it with a horizontal drawout vacuum circuit breaker (VM1/A/LR) using a magnetic actuator. It highlights the benefits of retrofitting over full replacement, including reduced CO₂ emissions, extended equipment life, improved safety through new shutters and interlocking, and compliance with ANSI/IEEE standards.