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  • 3 Phase to single phase conversion + phase changeover.?

    cameo

    Member

    Updated: Oct 26, 2024
    Views: 1.1K
    can some one shed some light on my query below.

    I have a system which has three phase input (R,Y,B).
    And now i need an output (say 230V),from the same system even if any one of the input phase fails.

    i mean something using relays transformers etc.

    any hints.

    -cheers.
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Replies

  • apsingh

    Member • Jul 25, 2009

    Hi!
    The contents of your query has been noted by me, shall study the same and would get back to you asap.
    Would really appreciate if you could please provide me with more details.

    Thanks & Cheers!!

    APS
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  • kashish0711

    Member • Jul 26, 2009

    Do you want the supply to be uninterrupted??
    or are you ok with system getting off for like 2 minutes when there is no power in a phase???

    If you are OK with small interruption then a simple changeover switch will be enough for you, whenever one phase fails, you just change the supply to another pahse and you get the supply back. 😀
    or if not then you can still use an automatic changeover switch. It will have a control logic system which will work on sequential timings. I can't provide much knowledge on it directly, I am still very inexperienced, but if you want, I can study and research on it for you. 😀

    I hope it helps. 😀
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  • Munguti

    Member • Jul 27, 2009

    You have to use a PLC which has all three phases fed to it and is programmed in such a way that if one phase fails the other one is connected.
    The relays you are talking about will be used as the switches with the plc controlling them.
    you have to find a way to detect if a phase is down, here you can also use relays again.
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  • lokesh ravikumar

    Member • May 13, 2010

    HI,
    Please note that if you are using a PLC then from which phase do we have to give power to PLC. If one of the phase fails, and if that phase the phase given to PLC then the system will fail. I think we will have to give a analog solution to this problem any body can help to develope one such thing.
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  • sheikkrm

    Member • May 13, 2010

    tell me example for a device working on Transformer Principle but not stationary it should be dynamic device?
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  • aj_onduty

    Member • Aug 25, 2010

    lokesh ravikumar
    HI,
    Please note that if you are using a PLC then from which phase do we have to give power to PLC. If one of the phase fails, and if that phase the phase given to PLC then the system will fail. I think we will have to give a analog solution to this problem any body can help to develope one such thing.
    Hello!!! The PLC can be controlled using a seperate battery, dont you think?
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