A 100MVA, 13KV, 3-phase generator has $Z_{g1} = Z_{g2} = j0.2 p.u$ and $Z_{go} = j0.05$. The generator is
solidly grounded, operating at no-load, and at rated voltage at the occurrence of fault. Take 100MVA,
13KV as base values and the no-load voltage of phase a as reference. The fault takes place at the
terminals of the generator. Answer questions (1-4):
1. For line to ground fault on phase a, the fault current in phase a, in A, is:
2. For line to ground fault on phase a, the phase voltage in phase b, in V, is:
3. For the a line to ground fault on phase a and if the generator neutral is isolated from ground,
the phase voltage of phase a, in V, is:
4. For a line to line fault between phases b and c, and if $Z_f = \infty$ and $Z_n = 0$, the fault current
in phase b, in A, is:
