A) Assuming the pre-fault bus voltages are at 1.02 pu, calculate the fault currents in each phase for a
single-line to ground fault at Bus-2. Specify your answers in per unit.

B) Assuming the pre-fault bus voltages are at 1.02 pu, calculate the fault currents in each phase for a line-to-line fault at Bus-2. Specify your answers in per-unit.

 

 

re-specify the data used in the calculation below Generator (G1 & G2) positive sequence impedance Motor M positive sequence impedance Transmission line positive sequence impedance Transformer T1 positive sequence impedance Transformer T2 positive sequence impedance Reactance (p.u.) 0.170 0.232 0.150 0.092 0.092 Generator (G1 & G2) negative sequence impedance Motor M negative sequence impedance Transmission line negative sequence impedance Transformer T1 negative sequence impedance Transformer T2 negative sequence impedance 0.076 0.258 0.150 0.092 0.092 Generator (G1 & G2) zero sequence impedance Motor M zero sequence impedance Transmission line zero sequence impedance Transformer T1 zero sequence impedance Transformer T2 zero sequence impedance 0.055 0.116 0.435 0.092 0.092