(Solved): a) A balanced three-phase Wye-Wye circuit follows the positive phase sequence at sinusoidal steady- ...

a) A balanced three-phase Wye-Wye circuit follows the positive phase sequence at sinusoidal steady-state. Note that we employ lowercase letters to represent the source end and uppercase letters to represent the load end of the network. The source phase voltage of phase A, the impedance of each line, and the impedance in each load phase are: $${\vec{V}}_{an}=240?0^{?}\mathrm{V},Z_{\text{line }}=1+j?,Z_Y=20+j10?$$ Determine the following: i) Plot the circuit diagram of the described three-phase circuit and label all parameters of the circuit ( 3 marks). ii) The effective value of the line current $${\mathbf{I}}_{bB}$$ ( 2 marks). iii) The load phase voltage $${\mathbf{V}}_{BN}$$ ( 2 marks). iv) The reactive power for phase $$\mathrm{B}$$ at the load ( 2 marks). v) The real power for phase A at the source (2 marks)