A 3 phase, 15 MVA, 13 kV, star connected alternator is protected by current balancing system of protection. If the ratio of CT is 1500/4, the minimum operating current of the relay is 0.8 A and the neutral point resistance is 4 Ω. The percentage of each phaser of stator winding which is unprotected against faults when the machine is operating at normal voltage is _______ (in %)