The open-circuit and shot-circuit tests are performed on a 240-kVA, 4800/240-V, 60-Hz transformer. The obtained data are as follows. Voltage, V Current, A Power, W Open-circuit test 240 9.7 1440 Short-circuit test 188.6 50.2 2625 1) Determine the parameters of the approximate equivalent circuit as referred to the high-voltage side. Draw the circuit showing the pertinent parameters. 2) Find the efficiency when the transformer is operating at 97% of its rated load, 0.78 power factor lagging and rated terminal voltage. 3) Calculate the load kVA at maximum efficiency and the transformer efficiency for this load kVA at 0.78 power factor lagging.