I have not seen anywhere the suggestion of field forcing of the machine has an impact upon the inital fault current which is limited by the sub transient reactance of the machine.
The field forcing is a measure to ensure that sufficient curret is available to operate the protection.
As the...
I am looking for typical Generator Rotor Shaft to Ground voltage for a 50MW 3000rpm 11kV Generator to establish if an earthing brush on the alternator rotor shaft will prevent and current flowing through the coupling and down to earth via the prime mover bearings.
Are there any other precautions...
