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typed by ben

Joined: 04/02/2008 Posts: 14919
Likes: 4326

What's this?

Did anything else change or is it a new symptom?


It sounds like inrush is exposing something in the system. Sometimes if the run value is too low (from a recipe change) the VFD will never actually get the motor to start up. Otherwise it could be broken or weak wiring, small wiring, bad winding in the motor, bad leg supplying the VFD? Lots of external factors to investigate before troubleshooting the VFD itself. A lot of times though it isn't the VFD.

[Post edited by typed by ben at 11/05/2018 4:48PM]

(In response to this post by ElbertoHokie)

Posted: 11/05/2018 at 4:47PM


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Current Thread:
 
  Got any Toshiba VFD experts for 350hp motors? ** -- ElbertoHokie 11/05/2018 3:43PM
  What are you experiencing or not experiencing? Not a Toshiba expert -- typed by ben 11/05/2018 4:33PM
  While pumping clean water, our slurry pump has started showing high amp -- ElbertoHokie 11/05/2018 4:40PM
  Did anything else change or is it a new symptom? -- typed by ben 11/05/2018 4:47PM
  We may have another issue. A fuse to one of the booster pumps -- ElbertoHokie 11/05/2018 4:50PM
  Yep a dead leg will do it ** -- typed by ben 11/05/2018 5:52PM
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  Rub some dirt on it. ** -- CPRVHokie 11/05/2018 5:05PM
  I'm all over that. -- Stork 11/05/2018 4:27PM
  If you don't know, you don't know. ** -- ElbertoHokie 11/05/2018 4:29PM
  But now I'm strangely fascinated. ** -- Stork 11/05/2018 4:30PM
  Toshiba Variable Frequency Drive -- ElbertoHokie 11/05/2018 4:32PM
  Just exactly as I thought. Thanks ** -- Stork 11/05/2018 4:46PM
  Believe it or not, I still don't know what you're talking about -- TomTurkey 11/05/2018 4:46PM
  Think of it this way... -- EDGEMAN 11/05/2018 4:54PM
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  Never heard of those before, but I guess it’s the most efficient way to... -- EDGEMAN 11/05/2018 6:35PM
  It actually drastically increases the efficiency of the motor too. -- ElbertoHokie 11/05/2018 6:36PM
  Nice! ** -- EDGEMAN 11/05/2018 6:51PM
  I never said I was interested... -- TomTurkey 11/05/2018 5:00PM

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