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  • doubt about transformer

    pikachu1994

    Member

    Updated: Oct 26, 2024
    Views: 1.5K
    how to test which is primary and which is secondary coil in transformer.in both the primary and secondary side there are only two wires.please help me...it is urgent
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Replies

  • Abhishek Rawal

    Member • Aug 25, 2012

    It is you who will decide which will be primary and which will be secondary coil.
    If you want stepdown transformer, turns in primary are more than secondary and if you want stepup then vice versa.
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  • Jeffrey Arulraj

    Member • Aug 25, 2012

    <a href="https://en.wikipedia.org/wiki/Transformer" target="_blank" rel="nofollow noopener noreferrer">Transformer - Wikipedia</a>

    check this out all about transformers
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  • [Prototype]

    Member • Aug 25, 2012

    Troll_So_Hard
    It is you who will decide which will be primary and which will be secondary coil.
    If you want stepdown transformer, turns in primary are more than secondary and if you want stepup then vice versa.
    haha, theoretical world mate..😁

    In actual transformer, you cannot distinguish between primary & secondary winding just by looking at it.

    Here are 2 possible methods which I can think of now.

    Try checking the impedance of the windings. The high impedance one will certainly be primary & lower impedance one will be secondary.

    Other method, a little risky one, would be to apply input to one of the windings & check the output at the other. Depending on the type of transformer, you'll be able to determine the windings from the output obtained at the other terminal.
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  • Jeffrey Arulraj

    Member • Aug 25, 2012

    [Prototype]
    Other method, a little risky one, would be to apply input to one of the windings & check the output at the other. Depending on the type of transformer, you'll be able to determine the windings from the output obtained at the other terminal.

    this can be made harm free by applying little higher voltage and less current

    the current has to be reduced if higher voltage is used for the power rating of any transformer is constant and if this power rating is exceeded transformer will blow up

    try it and if voltage op is lesser then that is the primary side of step down transformer and vice versa
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  • pikachu1994

    Member • Aug 25, 2012

    thank you all
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  • rajk. sharma

    Member • Aug 25, 2012

    primary wdg always connect with input source and secondary connect with load
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  • Jeffrey Arulraj

    Member • Aug 25, 2012

    rajk. sharma
    primary wdg always connect with input source and secondary connect with load
    but the qn here is how to differentiate between them
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