QNK 7.5KW 10HP 220V AC 33A VFD Converter Single to 3 Phase Inverter

Item seems to be of good quality and fits perfectly.!!! It arrived packaged very well and has a good instruction manual included. I would buy from this seller again.!!!

Powered up but would not work out of the box. Would not allow any parameters to be changed in an attempt to get to work in my application. The only saving grace is Amazon return policy.

Works well for my air compressor. Instructions are a little difficult to read, but once you figure it out, it’s pretty smooth sailing from there. The only trouble I had was with the control circuit, which is literally just a loop. I thought I had to hook up an external power source for the control circuits, but it’s literally just a loop with a switch in it, which in this case was the compressor pressure switch. Only power supply I had to hook up was for the 220 V. The unit itself is constructed of plastic, but it does not feel very cheap, it is actually quite a sturdy piece of equipment. I used a 10 hp unit for my 5 hp compressor. No overheating issues, and it also includes an internal temperature reading so you can monitor while it’s running. I would definitely purchase this again.

Tienen el manual en español, no soy experto y el ingles me complica la configuración, pero si logre arrancar un aire acondicionado, lo unico que me falta es arrancar el vfd con señal de 24 volts del termostato del aire acondicionado, o podrian explicarme como usar esa señal para que arranque y pare con el termostato, gracias

I have the QNK 10hp drive on 240VAC single phase running a 7.5hp 230VAC three phase motor. Works great so far. I recommend you be familiar with electrical controls/etc if you're going to be messing around with this type of equipment. It is dangerous if not setup properly. To set the main frequency (F003) and reference frequency (F004) higher than 50hz for the input parameter you MUST first change the max frequency parameter (F005) to 60hz, or it won't allow you to change any other parameter above 50hz.

Sorry, but the 10HP VFD seems to have a fatal flaw, the wire terminals are too small. The documentation and answers provide by Rufus are confusing and contradictory. Regardless, the real issue are the electrical terminals on this VFD. To use it you will need 6 gauge wire, and there is no safe way to connect 6 gauge wire to the VFD. You might be able to connect 8 gauge wire, but that's not big enough wire for the amp rating of the VFD. For 5HP and lower versions of this VFD you might be ok, but not the larger versions. Save you self the trouble of ordering one and returning it. I suspect most if not all of the economy VFDs you will find on Amazon suffer this same fatal flaw.

I connected it to 220VAC and I connected the 3 motor phases. And it worked. I didn't use any of the special controls or settings. I turned it on and off. Reversed directions. And varied the RPMs with the knob on the front. And I was pleased with how easy it was ti get it operating.

I was running VFD on 3 phase Mill for several years. Purchased newer 7.5HP Lathe and decided to go VFD on it also. Decided to remove the smaller VFD from Mill to use on other projects so I add a Drum switch ON/Off/ON to new VFD and operate the Lathe or Mill being side by side from single VFD. Mounted on swing post so VFD is accessible to either machine. Can only run one machine at time but for small one man shop works great.