hey, no one puts a CB in the neutral grounding circuit of any sized generator. If you did, the generator could become energized to high voltages in the event that a fault occured in the armature winding.
resistors and the neutral grounding transformer are sized to create a reactance which will...
hey S, I think you got things mixed up.
the dc field in a syn. gen. does not "saturate", however the ac core saturates and this limits the voltage induced in the armature winding by the field.
Second, changing excitation (magnetization) levels in a synch. generator changes Var...
I am not so sure one can fairly characterize cracked rotor bars in a large industrial motor after 20 years service as "severe" bar cracking"
The fact that a large majority of bar cracking was detected at same time, after decades of service, suggests a high cycle fatigue failure...
