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Can a 6 lead motor used from an old wye - delta starter be wired to a VFD, and how would you wire it. (nameplate data 60hp, 460 volt, 3 phase. lead #'s 1,2,3,7,8,9

Hey Guys, I have more info concerning this post. I had the motors sent out to be examined, and they found pin holes in the stator. If this is an over voltage problem, how could this be corrected?

Hey guys great info! as far as the cable placement, there is only one row of cables. None of the cables are placed on top of each other. They are straight across the cable tray. I checked all the cables and they are all copper 600mcm. As far as ferrous clips or supports there are none. The only...

hey guys, the cables are placed like this. cccccbbbbbaaaaannnnn the width of the tray. None of the cables are stacked on top of each other, and they are all tie-wraped to the tray individually.

As far as the megger check the cables were disconnected from the motor. Yes the motors are VFD rated and the ground testing was normal. One thing I did not mention is all the mechanical equipment has a sepperate utility transformer 13.8-480volts 5000 amps. And the rest of the building has a...

Hey Guys, just for the record the equipment is pushing 35 years. I know another testing company had scanned this equipment 4 years ago, and did not mention anything about this in there report. Another thing I noticed they bunched all the same phases together on the cable tray. The cable is tied...

I have run into a problem with one of the buildings i do preventive maintnance testing in. They have motors faulting to ground. They range from 25-125 hp , 480 volts. They are controlled with softstarters, VFD's with output reactors, and across the line starters. Each application varies. The...

I am waiting for a shutdown schedule. This is a critical load feeder. I will post results after shutdown. Thanks for the info!

I noticed a 40 degree rise between cables. I clamped on my meter and noticed one cable had approx.560amps, the other four cables had approx 200 amps. The swichgear current meter was showing around 1300 amps total current per phase so the total current reading makes sense. This is happening on...

Hello, I was infrared scanning a 2000 amp service 480 volts. The cables ran from a 2000 amp transfer switch too a 2000 amp main circuit breaker. The feeders are in cable and installed in cable tray. Approximate cable length 80ft. There where 5 parallel 600mcm feeders per phase.The problem I was...