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Before my first visit I was told they had an Allen Bradley PowerFlex installed. I arrived and found an ABB ACS310 so I was a bit unprepared to find the overload settings. I was initially thinking they simply had the setting too high. It didn't make sense that a VFD would allow an extended...

Application is a dust collector. Motor ran fine for a couple years, then they added some additional duct work and motors started burning out after only a few days use. Culprit appears to be excessive current draw. At 30 Hz the 25 hp motor is pulling 40A where it's nameplate FLA is 29A. I...