Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Ground fault on AC Tech SC450 Drive

Status
Not open for further replies.
Smoothcriminal

Smoothcriminal

Chemical
Mar 4, 2010
13
Hello,

We are currently using a AC Tech SF450 VFD to drive a 5HP conveyor brush motor. We have been having recurring "UF" faults that basically renders the drives useless. A quick troubleshot suggests the fault is a result of a ground fault. Any thoughts on avoiding ground faults on a VFD Drive? Should we be using a different drive? One that has an inbuilt ground fault protection? Please advice.
 
Replies continue below

Recommended for you

Sort by date Sort by votes
By "conveyor brush motor" I assume that you mean a motor that is driving a brush on a conveyor, not a conveyor motor that uses brushes inside of the the motor.

On that VFD, the "UF" fault code simply means you are giving the drive a Run command before the drive has finished powering up. You must wait at least 2 seconds after applying power to give the VFD a Run command. Some brands of drives allow you to close the Run command prior to applying power, this is not one of those.


" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden
 
Upvote 0 Downvote
Thank you for the feedback @jraef. You are right in saying it is a Motor that is driving a brush under a conveyor belt. So does the UF fault renders the VFD defective? Which brands would be recommend?
 
Upvote 0 Downvote
Try a delay on your run command when you power up the drive.
Do not power up the drive with the run command active.

Bill
--------------------
"Why not the best?"
Jimmy Carter
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

IOC-AUS
  • Locked
  • Question
Tech Explanation on Diesel Engine in AC Generator Set
Replies
13
Views
4K
waross
waross
rockman7892
  • Question
Fault current capability of DFIG generators 1
Replies
6
Views
4K
electricuwe
electricuwe
NickParker
  • Locked
  • Question
Rotor ground faults without slip rings
Replies
3
Views
2K
wcaseyharman
wcaseyharman
sry110
  • Locked
  • Question
Spinning a de-energized AC motor 4
Replies
17
Views
5K
jraef
jraef
bizkitgto
  • Question
Struggling to understand how Back EMF works in AC Motors 2
Replies
4
Views
1K
waross
waross

Part and Inventory Search

Sponsor

Back
Top Bottom