(Solved): Q4 A star-connected unbalanced load is connected to a balanced three-phase 210V,60Hz power sour ...

Q4 A star-connected unbalanced load is connected to a balanced three-phase $$210\mathrm{V},60\mathrm{Hz}$$ power source in sequence $$\mathrm{ABC}$$ as shown in figure $$\mathrm{Q}4$$. By taking $${\mathrm{V}}_{\mathrm{AN}}$$ as reference, palonlata figure Q4 (a) the phase voltages $${\mathrm{V}}_{\mathrm{AN}},{\mathrm{V}}_{\mathrm{BN}}$$ and $${\mathrm{V}}_{\mathrm{CN}}$$; (3 marks) (b) the load currents $$I_{Z1},I_{Z2}$$ and $$I_{Z3};$$ (3 marks) (c) the neutral current $${\mathrm{I}}_{\mathrm{N}}$$; (2 marks) (d) the total real power $${\mathrm{P}}_{\mathrm{T}}$$; (4 marks) (e) the total reactive power $${\mathrm{Q}}_{\mathrm{T}}$$; and (4 marks) (f) the overall power factor. (3 marks)