mbhydro:
Thanks for the additional information on this spectacular failure. It must have literally scared the $(^*$(*% out of the people who were fortunate (or unfortunate...?) to be eye witnesses [Linked Image]. I'm curious about something...shortly after the insulating oil erupts from the transformer and ignites, there is a very bright flash and explosion, after which the "humming" stops. Can you identify (or speculate) what happened at this point in this event?

This is quite a piece of video...I've watched it more times than my wife has watched "Gone With the Wind" [Linked Image]. Much more exciting...

Mike (mamills)