QI (a) A balanced star connected load of (8+j3) N is connected to a 3-phase, 415 V and 50 Hz supply. Draw the circuit diagram, indicating VRN, VRY and all line currents. Calculate: The 3 line currents...

Answer b) and c)?

Extracted text: QI (a) A balanced star connected load of (8+j3) N is connected to a 3-phase, 415 V and 50 Hz supply. Draw the circuit diagram, indicating VRN, VRY and all line currents. Calculate: The 3 line currents (IR, Iy and IB). (i) (ii) The total real power (W) and power factor at the 3 phase supply. (b) An unbalanced delta connected load consisting of the phase impedances ZRY (10+j3) 2, ZYB (12+j0) Q and Zrk (8+j3) N is connected to a 3-phase, 440 V, 50 Hz supply. Draw the circuit diagram including the implementation of a 2 wattmeter power measurement. Using the information above: Calculate the 3 load phase currents (IRY, IYB and IBr). Draw a scaled phasor diagram indicating all phase and line voltages and the three load phase currents. Using the scaled phasor diagram or otherwise determine the 3 line currents (IR, Iy and /B). (i) (ii) (iii) (c) Determine the total real supply power (W) for Q1(b) based on the 2 wattmeter measurements.