Bulletin 140MT Motor Protection Circuit Breakers with VFDs Application Technique

This application technique document explains considerations for selecting Motor Protection Circuit Breakers (MPCBs) when used on the output (load side) of a Variable-Frequency Drive (VFD), addressing the impacts of voltage pulses and current harmonics. It covers the functional control and protection requirements of Bulletin 140MT MPCBs, including disconnect, manual motor control, overload protection, and short circuit protection in single- or multi-motor installations.