Converting 480 volt 3 phase air compressor to 230 volt single phase with a VFD - 2 of 2

In this second video I cover the actual wiring changes, insertion of new contactors, connection of the air compressor control system and VFD, how the VFDs are activated via the controller and a host of other goodies!

I hope it helps someone considering doing the same!

While most of our needs will vary, here are the parts I used.

[bfqjimj]

Great info here, learned quite a bit and will refer back in the future. Subscribed, thanks!

[Bunker-Apparel]

Thank you for sharing this. We are installing a screen printer and we need a 10HP with CFM of at least 33 / rotary screw with a dryer and our shop is running single phase. It's a challenge to find one that is a 10HP in a single phase. I talked to a sales rep who sells different brands, and he stated that we should not convert a 3-phase air compressor to a single phase as it will shorten the lifespan of the compressor. However, I am seeing folks converting compressors over and I don't see anything neg on doing it. My question though is, you've laid out a very detailed plan of doing it but if we are just going to be needing to convert and run 1 air compressor, is there easier way you would recommend, you mentioned something about a rotary converter. The compressor will be almost running all day at 33 CFM and I want to we do this without having issues, so if need to spend a little more to get something that will hold up to the daily use. What would you recommend? Thank you so much.

[JohnnyCab]

How much of a difference would it have cost to replace the three phase compressor motor with a single phase motor compared with that converter panel. I have an old three phase five hp compressor that I use to have in my shop years ago but don't have three phase power at my house that would like to hook up my old compressor again.

[aaronandrson]

So i have an 80 gal vertical air compressor that is 220 volts 3ph. Motor is 7.5 hp and unit will do 25cfm max output. I do not need 25 cfm 90% of the time so i like the option of a VFD to be able to reduce speed and noise level . unit has a pressure switch and a starter no control board. from my understanding i would need a 15 hp VFD ? And would i still need the starter if i went with a vfd on a ramp up delay? Sorry for the questions i have been around VFD a little but never wired one.. this compressor was surplus and was free.

[chipsammich]

Do you have part #'s for the contactors, bar and connectors?Facebook? Or a way to contact you besides facebook?

[northlander]

Do you know why the schematic had you loop the 3rd leg around to the bottom of the relay?

[yogendraambalia]

How can i run 2 air compressor with one VFD ???
At one time only one compressor runs..