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Three 1-φ, 100 kVA, 1730/208 V, 60 Hz transformer are connected to form a 3-φ1730/480 V...

Three 1-φ, 100 kVA, 1730/208 V, 60 Hz transformer are connected to form a 3-φ1730/480 V transformer bank. The equivalent impedance of each transformer referred to the high voltage side is 0.3 + j0.4 ohms. The transformer delivers 40 kW to the load at 0.8 p.f. leading.

a) Determine the phase and the line currents at the primary and the secondary sides.

b) Draw the equivalent per-phase circuit refereed to the primary side and determine the primary volt

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