Q. The positive, negative and zero sequence impedances of a 125 MVA, three-phase, 15.5 kV, star-grounded, 50 Hz generator are π0.1 pu, π0.05 pu and π0.01 pu respectively on the machine rating base. The machine is unloaded and working at the rated terminal voltage. If the grounding impedance of the generator is π0.01 pu, then the magnitude of fault current for a b-phase to ground fault (in kA) isΒ ________________(up to 2 decimal places).
Ans: 73-74
Sol:
