A three-phase 20 MVA, 10 kV alternator has an internal reactance of 5% negligible resistance. What is the external reactance per phase required to be connected in series with the alternator so that the steady current on the short circuit does NOT excess 8 times the full load current?

A three-phase 20 MVA, 10 kV alternator has an internal reactance of 5%

1.	A three-phase 20 MVA, 10 kV alternator has an internal reactance of 5% negligible resistance. What is the external reactance per phase required to be connected in series with the alternator so that the steady current on the short circuit does NOT excess 8 times the full load current?
A.	2.38 Ω
B.	1.38 Ω
C.	0.38 Ω
D.	3.38 Ω
Answer» D. 3.38 Ω

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A three-phase 20 MVA, 10 kV alternator has an internal reactance of 5% negligible resistance. What is the external reactance per phase required to be connected in series with the alternator so that the steady current on the short circuit does NOT excess 8 times the full load current?

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