Grinder VFD Location?

I run a KBAC Nema 4 drive on my 3HP grinder and it's mounted on the wall right behind the grinder. Never given me a lick of problems.
 
I put my Chinese non-nema VFD in the adjacent cabinet and ran the control box through the wall. Works just fine.

7a871ec98d5dda7a08988cc225dc05ab.jpg

8238dcc520f21c72c839c860a94c95df.jpg



Skickat från min iPhone med Tapatalk Pro
 
The BUD Industries box I ordered has arrived. It should do fine. It's your typical relatively heavy-gauge electrical box. I'll want to put rubber feet on it and do some cutting, but it will work.

I think the folks who make VFD's need to sit down and consider the dimensions they choose. There are a million boxes out there with an inside depth of 4", but you need around 5" to get a VFD into a box, even sideways. I'm sure there is no technical obstacle to making a VFD 3 3/4" thick instead of 4 1/2".

Mounting the VFD will be a pain. The optimal choice is to have it facing up, toward the door, but the fan (thank you, Hitachi) is on the back of the VFD, so it would be pressed against the metal of the box. Also, there are knockouts all the way around the sides of the box, so I can't put screw holes wherever I want. I'm going to have to do something to lift the VFD off the back of the box, and then I'll have to fabricate something for the screws in the base to go into.

I am not sure what to do about the ethernet wire I have to run from the VFD to the remote panel. I may buy a plain old ethernet wall plate from Home Depot and install it in the door of the box.
 
Can you install a cable gland for the cat5 cable in the box? That way you can just go cable direct instead of adding an additional jack.
 
I'm not sure what I'm going to do. I like the idea of having a jack on the box itself so I can unplug it and have no wires hanging out.
 
The Mighty Ginsu said:
The BUD Industries box I ordered has arrived. It should do fine. It's your typical relatively heavy-gauge electrical box. I'll want to put rubber feet on it and do some cutting, but it will work.

I think the folks who make VFD's need to sit down and consider the dimensions they choose. There are a million boxes out there with an inside depth of 4", but you need around 5" to get a VFD into a box, even sideways. I'm sure there is no technical obstacle to making a VFD 3 3/4" thick instead of 4 1/2".

Mounting the VFD will be a pain. The optimal choice is to have it facing up, toward the door, but the fan (thank you, Hitachi) is on the back of the VFD, so it would be pressed against the metal of the box. Also, there are knockouts all the way around the sides of the box, so I can't put screw holes wherever I want. I'm going to have to do something to lift the VFD off the back of the box, and then I'll have to fabricate something for the screws in the base to go into.

I am not sure what to do about the ethernet wire I have to run from the VFD to the remote panel. I may buy a plain old ethernet wall plate from Home Depot and install it in the door of the box.
Click to expand...

Have you read the manuals for the VFD's ?


They often recommend a minimum size enclosure
It's not the smallest possible box that fits, it has to be large enough to provide airspace or cooling.

If you buy a NEMA 4 enclosure like a KB electronics KBAC model, the aluminum enclosure has built in heat sink features to the components inside
They don't have to rely on air convection inside the box so the boxes are smaller.




Cable Glands
 
So here is what I've been working on. Almost there. Still have to hinge the door and mount the fan and filter and then wire it all up. Does anyone know if my vfd will run 12v DC accessory?

cee6aeef636a38090026af806d65a3cb.jpg


939f4d36b62749e53f7d23691046bd1f.jpg


I left room at the top of the vfd so later I can add buttons and rheo instead of opening the door.

Sent from my iPhone using Tapatalk
 
I'm so angry. I went to hook up the wires on the vfd and low and behold the terminal for L2 is not there!!??! I guess I'll be calling Monday to tell them they forgot to install a terminal. [emoji35]


Sent from my iPhone using Tapatalk
 
I put mine in a dust proof box and mounted it on a chunk of 2x4 attached to the back of the bench. LOL, that's a long time ago when my garage was clean.

Grinder_zps4f115357.jpg


Grinder1_zpsa1ab624a.jpg
 
This vfd is a 220volt single phase input. I called deleted electric and Teco tech support and am very disappointed. I'm not a licensed electrician but understand electricity well and have wired up house and breaker panels. 220v single phase requires 3 wires one leg is 110 hot, and leg is 110 hot and the other is a neutral or return. So where do you you hook the wires. No matter how I explained it to them they just kept saying hook to l1 and l3 or call and electrician. Then they would say you get 220v to your house and that's one wire and it jumpers over and stupid crap. Uh no. Anyone delt with this before? They seem to think it suppose to be like that and it's not making sense to me. I only have two terminals for input voltage on the device and a separate ground.


Sent from my iPhone using Tapatalk
 
I'm not an electrician, but this is how my buddy hooked mine up.


This leads to a plug that goes to an outlet behind my grinder.
 
Ghostman3 said:
This vfd is a 220volt single phase input. I called deleted electric and Teco tech support and am very disappointed. I'm not a licensed electrician but understand electricity well and have wired up house and breaker panels. 220v single phase requires 3 wires one leg is 110 hot, and leg is 110 hot and the other is a neutral or return. So where do you you hook the wires. No matter how I explained it to them they just kept saying hook to l1 and l3 or call and electrician. Then they would say you get 220v to your house and that's one wire and it jumpers over and stupid crap. Uh no. Anyone delt with this before?



I only have two terminals for input voltage on the device and a separate ground.

They seem to think it supposed to be like that and it's not making sense to me.
Click to expand...

It is like that

Read the manual

220v single phase requires 3 wires one leg is 110 hot, and leg is 110 hot and the other is a neutral or return
Click to expand...

It's only a neutral if you need to get 110 out of it, like a dryer plug that has 4 wires

Two hots and ground are 220V
 
Ok thanks for the clarification. I asked them if I hooked it up like that and used the ground as return and they said no. When I asked them that they then said L3 was return and L1 was hot lol. It just seems funny the people I talked to were so clueless and not willing to help at all. There has to be a return somewhere.


Sent from my iPhone using Tapatalk
 
Ok I studied up a little more on 220v and understand it a little better. No return is needed on 220v. I thought there needed a return as I always wired it with one. The transformer at the pole takes care of the return through the hot legs of the 220v.


Sent from my iPhone using Tapatalk
 
So I have a 2HP motor and it seems that I can bog it easier than my friends 1.5hp. Differences are mine is direct drive with a 5" wheel and his is belt driven with a 4" wheel. Did I really loose that much torque with a 5" wheel? Is there some setting on the vfd possibly that will make it maintain same speed. Maybe I need a speed sensor?


Sent from my iPhone using Tapatalk
 
Ghostman3 said:
So I have a 2HP motor and it seems that I can bog it easier than my friends 1.5hp. Differences are mine is direct drive with a 5" wheel and his is belt driven with a 4" wheel. Did I really loose that much torque with a 5" wheel? Is there some setting on the vfd possibly that will make it maintain same speed. Maybe I need a speed sensor?
Click to expand...

Did you read the manual yet ?
 
You must log in or register to reply here.
Back
Top