When a generator is operating at no load, that is, with the generator breaker open, the only flux produced in the machine is a result of the DC current in the field windings on the rotor. This rotor flux bridges the air gap between the rotor and the stator and travels around the perimeter of the stator at rotor speed. As it sweeps across the stator, it passes through the A, B, and C phase stator windings, inducing a voltage in each stator coil. The instantaneous flux in the