Now that said, using the 10x rule, you can get a sufficient protective effect by grouping multiple VFDs behind one line reactor, so long as that reactor size stays within the 10x rule for the smallest drive behind it.
With that being said, I'm trying to reduce the possibility of this cascading destruction again. I'm assuming it would be a more robust solution to have a line reactor for each drive vs. grouping multiple drives behind one reactor?
Thank you jraef, that was really great information. This gives me a lot to think about regarding future installations, and worry about from past installations.