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Determine the wattage of a transformer

Discussion in 'General Electronics Discussion' started by byazici, Jul 25, 2013.

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  1. byazici


    Nov 10, 2010
    Hello all,

    Maybe a simple question but, I have a transformer at hand, it is enclosed (shields) and I dont want to take them off, but it has labels for the primary and secondary windings.

    There are two primaries that are 0-115V for running it on 115 and 230V voltage.

    The secondaries are little bit more numbered, 11 in all with two center tap poles. All of them are marked with their amps.

    My question is, if I know all the info on the secondary windings, is it possible to calculate the minimum wattage of the transformer? If so, using what formula?

    Thank you.
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Compare the weight to other transformers of similar construction. Power is roughly proportional to weight.
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