A fault occurs in the R phase of a solidly grounded unloaded alternator. The fault current IR1 and neutral current IN are given
1
\({I_{R1}} = \frac{{{E_a}}}{{{Z_1} + {Z_2} + {Z_0}}}\;and\;{I_N} = {I_{a0}}\)
2
\({I_{R1}} = \frac{{{E_a}}}{{{Z_1} + {Z_2}}}\;and\;{I_N} = 2{I_{a0}}\)
3
\({I_{R1}} = \frac{{{E_a}}}{{{Z_1} + {Z_2} + {Z_0}}}\;and\;{I_N} = 3{I_{a0}}\)
4
\({I_{R1}} = \frac{{{E_a}}}{{{Z_1} + {Z_2} + {Z_0}}}\;and\;{I_N} = 0\)