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Siemens VFD

Discussion in 'Electronic Design' started by Ink Maker, Aug 14, 2007.

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  1. Ink Maker

    Ink Maker Guest

    In our 6x12 three roll mill, we use a Siemens Micromaster 440 VFD. The
    input power is 3 phase, 208V, 60 Hz. Can I connect it directly to a
    single phase 220V, 60Hz power supply?

    Ken

    Opportunities are never lost. The other fellow takes those you miss.

    | Torrey Hills Technologies, LLC |
    | www.threerollmill.com |
    | www.torreyhillstech.com |
     
  2. Robert Baer

    Robert Baer Guest

    No.
     
  3. mpm

    mpm Guest

    You cannot generally operate 3-phase equipment on single-phase
    service.
    You can "fake" the other phases using a phase-maker.
    They're noisy electrically, and in my experience prone to long-term
    failure, but they do work.
    A motor-generator setup can accomplish the same thing.

    You might luck out and be able to convert the equipment to 1-phase.
    Sometimes, it can be as simple as changing the taps on the equipment's
    main power transformer. I am not familar with the equip, so you'll
    have to ask someone who is.

    Either way, if you can run it on 1-ph, it probably won't be as
    efficient, or will require a higher amperage than it would on 3-ph
    (which makes sense). I mention it only because there is the
    possibility the 1-ph service might not be sized appropriately.
     
  4. JosephKK

    JosephKK Guest

    Ink Maker posted to
    sci.electronics.design:
    It may work. If it does you should derate the thing to about half
    power. Feeding it properly with a phase converter (rotary or
    static) is a better way to go.
     
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