B. A 10-kVA, 2300/230-V transformer is to be tested to determine its excitation branch components, its series impedances and its voltage regulation. The following test data have been taken from the primary side of the transformer: Open- circuit test Short- circuit test Voc = 2300 V Vsc = 48 V Ioc = 0.20 A Isc = 5.0 A Poc = 40 W Psc = 180 W The data have been taken by using the connections of open-circuit test and short-circuit test: a) Calculate the full-load voltage regulation at 0.8 lagging power factor and 0.8 leading power factor b) What is the efficiency of the transformer at full load with a power factor of 0.8 lagging?

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