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Thread: 6 phase forked star secondary wound transformer

  1. #11
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    The only dealings I’ve had with hexaphase is with MAR’s and that’s going back to when Noah built the ark.

    The calculations for voltage are pretty basic, phase to phase voltage equals phase to neutral voltage, an equilateral triangle.
    MIET ARPS

    I’m English so what do I know?

  2. #12
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    Quote Originally Posted by Tony S View Post
    The only dealings I’ve had with hexaphase is with MAR’s and that’s going back to when Noah built the ark.
    You mean mercury archaic rectifiers?
    Si hoc legere scis nimium eruditionis habes.

  3. #13
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    Quote Originally Posted by Besoeker View Post
    You mean mercury arc rectifiers?
    Yes, but the transformer has a few extra windings for ignition and excitation.
    MIET ARPS

    I’m English so what do I know?

  4. #14
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    Quote Originally Posted by Tony S View Post
    Yes, but the transformer has a few extra windings for ignition and excitation.
    We did a bunch of them, 70kA total, for an anodising line. the supply was from a couple of local ONAN focal transformers supplying 660V and our hexaphase units had auxiliary 400V tap to feed the phase control firing circuits.

    Not the kind of thing where you can afford to get your sums wrong.

    Si hoc legere scis nimium eruditionis habes.

  5. #15
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    Hi Guys,

    Apologies for the delayed response, this is a question presented to me in an exam and I had no idea about it. Reference material is very hard to come by, hence my question on here.

    The primary can be either delta or star three phase as far as I am aware and the secondary has a total of 9 windings.

    Vague I know.......

  6. #16
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    Reply

    Quote Originally Posted by Besoeker View Post
    We did a bunch of them, 70kA total, for an anodising line. the supply was from a couple of local ONAN focal transformers supplying 660V and our hexaphase units had auxiliary 400V tap to feed the phase control firing circuits.

    Not the kind of thing where you can afford to get your sums wrong.

    Do You have the calculation method?

  7. #17
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    Quote Originally Posted by Tony S View Post
    Yes, but the transformer has a few extra windings for ignition and excitation.
    I did mean archaic. Thought you might see the funny side.
    Was my wit wasted.........
    Si hoc legere scis nimium eruditionis habes.

  8. #18
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    Quote Originally Posted by RogerRoger25 View Post
    Hi Guys,

    Apologies for the delayed response, this is a question presented to me in an exam and I had no idea about it. Reference material is very hard to come by, hence my question on here.

    The primary can be either delta or star three phase as far as I am aware and the secondary has a total of 9 windings.

    Vague I know.......
    Does the second diagram in post #7 pertain?
    I've never seen such a beast in real life and I can't imagine what it could be used for.
    A nine phase rectifier.............?
    Si hoc legere scis nimium eruditionis habes.

  9. #19
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    Quote Originally Posted by RogerRoger25 View Post
    Do You have the calculation method?
    Well, I desinged it so I suppose the answer is yes.
    But what do you want to calculate?
    Si hoc legere scis nimium eruditionis habes.

  10. #20
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    Quote Originally Posted by Besoeker View Post
    Well, I desinged it so I suppose the answer is yes.
    But what do you want to calculate?
    The secondary line voltages but I would like to see the full method if possible?

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