A three-phase generator includes an internal neutral junction to which one end of each of the windings of the generator is connected thereby forming a wye-connected generator. An air-core current transformer is disposed over each of the three conductors leading to the internal neutral junction for monitoring neutral current therein. A corresponding air-core current transformer is disposed over high-voltage terminals connected to the other ends of the generator windings. The difference currents from the neutral and high-voltage ends of each generator winding are compared, therewith monitoring the generator. Connectors are provided for isolating two of the three generator windings from the internal neutral junction to enable isolated testing of the three windings. |