Originally Posted by Malteser
The snarky answer would be hook it up, but seriously... It takes a current approximately 10 times the breaker size to trip in the time that the field is being generated in a transformer, So, it is not likely that a 100A breaker is going to trip from the inrush. I just wouldn't worry about it. But (and I am just an electrician, get a sensitive meter, and read the resistance of the primary coil. The maximum current is going to be that I=E/R and it will go down immediately. A breaker is generally a plus or minus 10% and it isn't even within 1-2% for repeats, so you can't really calculate exactly what amperage would trip the breaker.
I know what I don't know, and I know where to go to find it!