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Q#1 Fault Analysis GATE EE 2018 NAT +1 mark -0 marks

The positive, negative and zero sequence impedances of a 125 MVA, three-phase, 15.5 kV, star-grounded. 50 Hz generators are j0.1pu, j0.05pu and 10.01pu 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 j0.01pu, then the magnitude of fault current for a b-phase to ground fault (in kA) is _______ (up to 2 decimal places).

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