A 10 kV alternator is protected by the balanced circulating current system. It is grounded through a 10 Ω resistance. The protective relay operates at 1.8 A in the pilot wires, which are connected to the secondary windings of 1000/5 CT. The percentage winding which remains unprotected will be
1
20%
2
31%
3
62%
4
76%
5
None of these