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three-phase

  1. Commercial Electrical Forum
    Hello everyone! I was hoping I could get some help here. I would like to thank you in advance! So, I have this situation in which the machine I am trying to hook up requires 380V Line to Line and 220V Line to Neutral. The building in which I am installing this machine only has 208V Wye. The...
  2. NEC Code Forum
    I am calculating loads for three-phase motors using NEC 430.250. Can anyone tell me if the amps listed in this table are per phase or the total amps drawn by the motor?
  3. General Electrical Discussion
    My company does audio visual services. When we use a single 120/208 VAC Three-phase "Y" power source for lighting, audio and video we get noise caused by the lighting dimmers injected into the audio and video. We purchased a 30 KVA Isolation transformer. We tie-in power and run it first to...
  4. PLCs, VFDs, Motors and Controls
    So here is the set-up: Three current transformers shall be clamped to the secondary side of a transformer. Then two power analyzers will be connected across two phase of the 3 phase system because I wanted to implement a two-watt hour meter method. The reason for the transformers is to scale...
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