A three-phase unbalanced delta-connected load is connected to a balanced three-phase 346 V, 50 Hz power source with phase sequence ABC as shown in figure Q1. The impedance of the loads Z, Z2, and Z3 are 50+j30 , 15+j20 , 10-j40 2 respectively. By taking the line voltage VAB as reference, determine: N B C Aa lb Icc I I N Z b lbc figure Q1 Load a lab Z3 Z (a) the line voltages VAB, VBC and VCA; (3 marks) (b) the load phase currents lab, Ibe and Ica of the load; (3 marks) (c) the line currents IAa, IBb and Ice; (6 marks) (d) the total real power dissipation PT of the loads; (5 marks) (e) the total reactive power Qr of the loads; (5 marks) (f) the apparent power of the whole system; and (2 marks) (g) the overall power factor of the system. (3 marks) Ica