Thank you. I wasn’t real clear on that was I
The 15hp motor is nameplated at 38a and it was drawing close to 56a on all three legs. Those are 60a sloooooow blow fuses in there and they didn’t pop. The VFD shutdown with an angry message about overcurrent and under voltage but not before melting some wiring and making a stinky mess in that disconnect.
That box has since been replaced with a 100a rated non fused box. I don’t know why the fused box was there in the first place as the VFD has more protections built in than those fuses provide. Heck I’m not even sure why there is a disconnect there lol.
Anywhooo ….. the DC side of the VFD was only putting out around 275v and should be closer to 400v and is therefore struggling to put out more than 190v AC to the motor. That’s making it cranky and it’s drawing way too many amps. So I lowered the VFD from 60hz to 57hz to spin the motor just a little slower and the volts are holding around 207 and it’s back around 34a again. New VFD will be here in a few days so it can be used for the last week or so of corn drying to make sure it’s gonna work before being idle for 11 months lol.
In other news I got up close and personal with some things on the combine we forgot to address this summer. The feeder stopped working and upon inspection I had a moment of “well crap, I knew I forgot to fix something this summer before we needed it!!”
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Old hub vs new hub. Good grief I can’t believe I let that slide by the summer inspection
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