Q1) A 3-phase ,Y- connected generator( power source)is supplies power  a 3 -phase ,Y- connected load ,through a 11.4/0.66 KV step-dawn , Y/Δ  , transformer, the impedance of the transformer referred to the secondary side is (3 +3.6j)Ω. The generator connected with transformer through a feeder whose impedance  (1.2+1.5j)Ω per phase. The load connected with transformer through a feeder whose impedance  (0.2+0.3j)Ω per phase. The load consumed at power source 25 KW at 0.8 PF  lagging and 600 V , as shown in figure (1).Determine the supplying current and voltage consumed from the power source . (V source ,I source )                                      

11.4/0.66 KV 1.5jn uw WW (0ww Trans. Y /A secondary= (3+ 3.6j) n 1.2 0 0.20 0.3 i0 25KW , 600 V , 0.8 Lag. Y-Connection , Load Transmissin Line Transmissin Line Figure (1)