Help me not fry my motor

Where you've got that ground wire spliced coming from VFD, please do splice another wire ground there and connect to the ground terminal on VFD. As Nike says "Just do it" {g}
 
Alright so I thought the high voltage diagram was for 220. Thats not correct though, right? The motor specs say voltage 230/460. So the low voltage diagram is how I need to wire it?

Looks like the only thing I need to do to get it up and running is get a plug on it for 220 outlet wired in and switch jumpers around in controller.

Don't think I'm gonna mess with the 110. Have already moved the garage around to set up grinder by 220 outlet.
 
You are referring to the wiring diagrams for the motor? If so, then yes, the high voltage is for 460 and low voltage for 220/230/240, all depending on what you've got.

VERY IMPORTANT - before wiring anything what part of the world are you in? Different countries have different voltage and ways of wiring. Here in USA typically a 1 ph 220vac circuit will have two hot wires, while in other parts of the world it might be a single hot wire with neutral.
 
Here in USA typically a 1 ph 220vac circuit will have two hot wires, while in other parts of the world it might be a single hot wire with neutral.
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What makes no difference in operation of the appliance. Each is a current carrying conductor at full voltage reletive to each other.

US scheme could be argued safer as its 120V to ground rather than 230V to ground.
But US scheme has twice the chances of contacting ungrounded conductor.
 
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Captain McKrae said:
Alright so I thought the high voltage diagram was for 220. Thats not correct though, right? The motor specs say voltage 230/460. So the low voltage diagram is how I need to wire it?

Looks like the only thing I need to do to get it up and running is get a plug on it for 220 outlet wired in and switch jumpers around in controller.

Don't think I'm gonna mess with the 110. Have already moved the garage around to set up grinder by 220 outlet.
Click to expand...

Low voltage will be 230. The VFD takes 110v, but outputs 220 to the motor, or if your input is 220, it will also output 220 to the motor.
 
I need help. The vfd and motor seemed to be wired properly. Without a belt, it seems to spin the drive wheel pretty fast. I put a belt on and it has a reasonable amount of tension, and it turns very slow. The vfd is on default settings, and i have frequency set to 60hz, not sure what to do :(
 
I am reading the manual and i dont really understand what a lot of this stuff means, but i see the "motor rating frequency" default is 400hz. That should probably be 60hz i imagine.
 
Looks like there are two sets of defaults in the manual, and the vfd is preprogrammed for the wrong default. The "right" default seems to be based on a 50hz standard, so i will modify for 60hz.
 
I changed settings and now it will run good, but only at one speed! I cant change the frequency like i used to be able to.
 
Holy cow i figured it out. Had to change "input frequency source" from "potentiometer" to "panel", whatever that means. This thing is scary at full speed! The 1/3hp little sander i was using looks like the kids toy it is!
 
Randy3000 said:
Holy cow i figured it out. Had to change "input frequency source" from "potentiometer" to "panel", whatever that means. This thing is scary at full speed! The 1/3hp little sander i was using looks like the kids toy it is!
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Good for you Randy:thumbsup: Glad you could git er done. Sorry I couldn't help you on this one. 30 years as an electrician and I have never worked with VFD driven motors, go figureo_O
 
I was stressing out for a bit there! I kept waiting to read "all your grinders are belong to us" while going through that manual.
 
Ooops Randy - sorry I missed your question today. You should have..... Oh wait, you can't PM me from this site. My fault for not checking forum close enough. Sounds like you've got it going. If you wish to review the parameters compared to my setup, drop me an email to sailingtoo@gmail.com and we'll see what we can do. I think you figured out the issue with setting speed. You're right, you've got to set parameter depending on if you want speed control from front panel or a remote pot.

Ken H>
 
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