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Results tagged with vfd
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user 280017
Variable frequency drive, a three-phase AC output motor controller. Questions about vacuum fluorescent displays should not receive this tag.
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What would cause DC bus voltage on my VFD when the disconnect is off
125 hp 480 vac HMax VFD. Controlling a pump motor. Motor is not spinning and line to the VFD is disconnected. … The VFD is installed in an MCC. There is another VFD beside it same size controlling another pump. When it (the other vfd) is running that is when the DC bus gets a charge going to it. …