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Problem (2) a) What are the basis applied for selecting rectifier diodes.? b) A direct voltage of 30 volts and a direct current of 200 A are needed for a heater. A three-phase supply with 380 v is available. i. Sketch the input a.c voltage, output d.c voltage and current, diode currents, supply currents, and the diode voltage for; – A three-phase full wave rectifier. – A three-phase half-wave rectifier. ii. Calculate the values of the transformer secondary a.c voltage and a.c current, the peak reverse voltage, the transformer apparent power, the transformer utilization factor, and the transformer turns ratio for both configurations.
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