Ig = Ia = 3 × I0 = 8618 A primary. The generator differential CT secondary will be 8.62 A, which
is still adequate. However, if a neutral CT and relay were installed, the CT ratio could be as low
as 100:5 which would result in a neutral relay current of 431 A.
(c) High-impedance grounding: Rn = 10 ohms