engineering recuitment GATE EE 2023-24 Test Series Power Systems Protective Relays Differential Relays
A 11 kV 100 MVA alternator is grounded through a resistance of 4 Ω. The C.T.s have a ratio of 500/5. The relay is set to operate when there is an out of balance current of 2 A. What percentage of generator winding will be protected by the percentage differential protection scheme?
1
93.7
2
6.3
3
87.4
4
84.5