VFD Options

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

• Buy a special earth-leakage relay
  • Pros: This should work?
  • Cons: Doesn't list the price and can't find it on ebay. Probably extremely expensive