UNSYMMETRICAL FAULT CALCULATIONS – PART – 18 – SINGLE LINE TO GROUND FAULT – TWO PROBLEMS

PROBLEM – 01

A star connected alternator with earthed neutral. A single line to ground fault occurs near the generator terminal of phase R. The fault current is 300 A. Calculate the sequence currents in the other phases and also calculate the if a reactance of 0.3 ohms is connected to the neutral calculate the fault current.
PROBLEM – 02

A three phase 10 MVA, 13.2 kV generator with earthed neutral supplied a feeder. The sequence impedances of generator and feeder are mentioned below. If a single line to ground fault occurs at the far end of the feeder, calculate the fault current.