VFD

[Dmerrll]

I have purchased a Mitsubishi FREQROL A220E VFD. Has anyone hooked something like this up to 3-wire single phase 220? What do you do with the neutral wire. They have me only hooking up the 2 hot legs.
Thanks Looking forward to not changing pulleys anymore

[Thrud]

In Canada, single phase 220/240V
bare copper wire is GROUND
Black and Red are hot
White is Neutral
Voltage between red/white, black/white, black/gnd, or white/gnd is 110/120V
Voltage between Black & Red is 220/240V
Voltage between White/gnd must be zero volts.
These voltages are only to show you what is happening in the circuit!

Never wire up a hot wire and ground for power - Hot and Neutral for 120V, ground is for safety!!!

BEFORE YOU START MAKE SUR THE POWER IS DISCONNECTED!!!
It sounds like they want the two hots wired so you have 220/240V input. Wire nut the neutral wire so it cannot short out and wrap with electrical tape. Make sure you connect the ground properly. If you are using Aluminum wire you must use the antioxidant compound when wirenutting the connections. Wrap each wirenut conection with electrical tape except the ground circuit,

If you are unsure, it would be safer to have a licensed electrician wire it for you to a range plug or other suitable outlet along with its mating socket in your shop. That way if it packs it in, you have some recourse and less hassles from your insurance company. The wiring job way have to have an electrical inspection before use as well depending on local laws and electrical code.
Another good reason to let the pros do it.
Read the manual before using and have fun!

Dave


[This message has been edited by Thrud (edited 09-30-2001).]