A transformer is rated at 629 va and has a primary voltage


A transformer is rated at 629 VA and has a primary voltage of 435 V and a secondary voltage of 133 V. Its rated copper losses are 46 W and the iron losses are 20 W. Calculate the load factor (in %) that would result in maximum operating efficiency at unity power factor.

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Mathematics: A transformer is rated at 629 va and has a primary voltage
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