Hacksaw,
Thanks for the feedback.
Is the overvoltage likely to be able to sink 2,500A? The agencies involved haven't located the low impedance return path for the current blast. The CP generator was not damaged in this instance and was reported to be in continuous operation.
Any clues about...
I have an instance where a pipe system with cathodic protection was the return path for a 2,500 ampere (estimated) surge. Is it usual to have over-voltage, lightning, or surge protection on CP generation transformers or rectifiers?
Thanks for any feedback!