It is required to reduce the voltage from U1 = 6 kV to U2 = 120 V using an autotransformer having w1 = 3000 turns. Secondary winding resistance r2 = 0.5 Ohm. Resistance of the external circuit (in the reduced voltage network) R = 12 Ohm. What number of turns of transformer w2 should be connected to the reduced voltage network? Neglect the resistance of the winding through which the high voltage current passes.

Detailed solution. Format gif