Reply by paleoelectronics

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Posted on Old three phase motors and Variable Frequency Drives (VFD)

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7 posts in 2400 days

#1 posted 11-21-2011 05:34 PM

New to this chat room and although not really a woodworker myself, I am an electrician who helps a lot of my cabinet building and blacksmith buddies with the ancient equipment that they pull out of barns around here. I am trying to find help about a VFD problem Im having with Chinese equipment in a brewery that I’m doing some work on. Its a 4.4 HP 220/480 volt Chinese motor transmission assembly that has been making a clanking sound when wired in the lower voltage ( Delta) configuration. This matches the system voltage which is a delta High leg. The drive operating this motor is a 5HP drive from Automation Direct. The unit operates poorly and will fault out on overload after a short while. However when this same unit is wired in the Wye configuration it operates properly with no noise whatsoever. I was impressed with the expertise I have read in this thread and was wondering if you could help me with this problem before I go bald from scratching my head

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