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variable frequency drive

  1. PLCs, VFDs, Motors and Controls
    I took a test for a plant electrician at an automated fruit packing plant. For the practical section I was supposed to connect a VFD to a motor. I can't recall if it was single or 3-phase. There were about 6 wires between the VFD and the motor where I was expecting 3 at most. I think the VFD was...
  2. General Electrical Discussion
    I'm a mechanical engineer, so this is a little out of my expertise. I have a main distribution that's rated at 480 VAC, 225 A running through a wye transformer rated at 480 VAC - 480/277 VAC to a sub panel rated at the same 480/277 VAC. I'm trying to operate a motor at 460 VAC, 38.1 FLA...
  3. PLCs, VFDs, Motors and Controls
    As for speed of the motor i want to control with a simple 10k pot. At laboratory, there are controllogix l63, powerflex that i need... And, there is stratix 8000, it communicates plc with powerflex 70 drive. So, i want to vary +- 10 V with pot: when i looked to powerflex sheet...
  4. Commercial Electrical Forum
    :001_huh:Need some input from someone who knows VFDs well. Why do VFD manfg require that you pipe in EMT conduit the load side of a VFD to the motor? I'm guessing something about the harmonics created with the VFD, but would MC cable be acceptable too? I notice multilple VFDs loads are to be...
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