(Solved): 1. A 60Hz three-phase system is shown in Fig. 1. There is a three-phase source connected to two th ...

1. A 60Hz three-phase system is shown in Fig. 1. There is a three-phase source connected to two three-phase loads, Z? and Z2. The input sources are Va=120 ?0°, Vú=120 ?-120°, Vc-120Z- 240°. Z? 3+j4 92, Z2=5+j12 2. (100 pts) Z? Z? Z? Ib ? Vb Ila Va Ve Ic Iza Z? Z? Z? Va Fig. 1. A three-phase system. (a) Draw the equivalent single-phase circuit topology. (20 pts) (b) Please write the expressions of the voltages Va, V?, and Vc in the time domain. (20pts) (c) In the phasor domain, please calculate the current I?a and I2a. (20 pts) (d) In the phasor domain, please calculate the current Ia. (20 pts) (e) In the phasor domain, please calculate the current lú. (20 pts)