Q3 A 380V, 50 Hz, 3-phase supply is connected to an unbalanced delta-connected load as shown in Figure Q2. The impedance

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Q3 A 380v 50 Hz 3 Phase Supply Is Connected To An Unbalanced Delta Connected Load As Shown In Figure Q2 The Impedance 1 (181.84 KiB) Viewed 39 times

Q3 A 380V, 50 Hz, 3-phase supply is connected to an unbalanced delta-connected load as shown in Figure Q2. The impedance of the loads Z. Z. and Za are 150 +j210 2. 80 - j80 2,75 + 355 12 respectively. Two-wattmeter method is adopted to measure the total real power supplied to the load. Load V VA WA Figure Q3 By taking Van as reference, calculate a) the phase current Lab. Ise and L. of the load; (3 marks) b) the line currents la, Is and Ice; (3 marks) c) the voltage VBA and VCA: (2 marks) d) the reading of wattmeter WA and Ws. Hence determine the total power consumption of the load; and (4 marks) e) the overall power factor of the load. (3 marks)