the maximum efficiency of a transformer is at which power factor?

electrician

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  • at unit power factor ( upf) only
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  • Condition for maximum efficiency of transformer can be obtained by differentiating the efficiency equation of the transformer with respect to the load factor (dη/dα).
    where η is the efficiency of the transformer
              α is the load factor = (operating load of transformer/ full load of transformer)
    By solving the equations it will be obtained such that Maximum efficiency of transformer is at
                     P core loss = α2 x P copper loss
    From the above equation it can be defined as the maximum efficiency of the transformer occurs at a load factor (α) at which the iron losses is equal to copper losses.
    0
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