Three single-phase, 50 kVA, 2300/ 230 V, 60 Hz transformers are connected to form a 3-phase, 4000V/230-V transformer bank. The equivalent impedance of each transformer referred to low-voltage is 0.012 + j 0.016 2. The 3-phase transformer supplies a 3-phase, 120 kVA, 230 V, 0.85 power-factor (lagging) load. (i) Draw a schematic diagram showing the transformer connection. (ii) Determine the winding currents of the transformer. (iii) Determine the primary voltage (line to line) required. (3 x 3)