The Problem

When the spindle on our EMCO mill spins up, it causes the GFCI to trip. We are using a VFD (Variable-frequency Drive) to run the EMCO mill from 115V power. This is the VFD we are using: Link

We do not have access to native 3-phase power. This is in our shop (this might be relevant for electrical regulation purposes).

Question: Is it possible to run the 115V VFD on a GFCI circuit without tripping it? And, will it cost more than $200 to make it work?

Helpful Article: Link

Solution Options

Buy a 220-240V VFD (without GFCI) and run 220-240V power to the mill. Pros : No GFCI is required for 220V according to NEC? Cons : We would need to spend ~$150 on buying a new VFD, and extra money on running another 220V line ~35 ft. the mill.



Buy a VFD with GFCI. Pros : It would be hardwired from the breaker to the VFD and it will still have GFCI. Cons : We would need to spend ~$150 on buying a new VFD. We would also need to spend a small amount of money on replacing the wire that goes from the breaker to the VFD.







Buy an isolation transformer Pros : This should work? Cons : Expensive option

