If the severity of single line-to-ground fault at the terminals of an unloaded star connected synchronous generator is greater than that of 3-phase faults, then __________ where, X1 is the positive sequence reactance of the generator, Xg0 is the zero sequence reactance of the generator and Xn is the neutral reactance.
1
\({X_n} > \frac{1}{3}\left( {{X_1} - {X_{g0}}} \right)\)
2
\({X_n} = 3\left( {{X_1} - {X_{g0}}} \right)\)
3
\({X_n} < \frac{1}{3}\left( {{X_1} - {X_{g0}}} \right)\)
4
\({X_n} = \frac{1}{3}\left( {{X_1} - {X_{g0}}} \right)\)