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# Mathcad - 05-11 - kVA kW Fp:= 0.83 Problem 5-11 Solution...

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η 96.849% = or η 0.968 = η P out P out P cu + P core + = P out 83kW = P out F p S rated = The power out can be found from the rated load and given power factor P core 1.2kW = core loss at rated voltage P core P oc = P cu 1.5kW = copper loss at rated current P cu P sc = The expected efficiency can be found by recognizing that the losses of the transformer at rated voltage and current are given by the short and open circuit tests

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Mathcad - 05-11 - kVA kW Fp:= 0.83 Problem 5-11 Solution...

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