Question (2) CLO-3
a) Draw and explain positive, negative and zero phase sequence components. (8)
b) A 3-phase, 20 MVA, 13 kV alternator has an internal reactance of 5% and negligible
resistance. Find the external reactance per phase to be connected in series with the
alternator so that steady current on short-circuit does not exceed 10 times the full load
current. (6)