GFCI Circuit Breakers and AC Drives Application Guide

This document explains why GFCI circuit breakers on AC power feeding a variable frequency drive (VFD) are likely to trip due to common mode noise generated by the drive's IGBT switching. It provides corrective actions such as using VFD-rated motor cable, proper grounding, RFI/EMC filters, and isolation transformers to reduce or eliminate nuisance tripping.