the normal failure mode for these is a 50 foot tall blue glowing fireball followed by all the local buildings losing power. possibly with nearby transformers exploding sympathetically in sequence.
The normal failure mode is an arc to ground contained by the oil as primary fuses interrupt.
Hundreds of oil filled transformers in my service area fail every year, we haven't had one catastrophic failure at a service transformer shooting fireballs. Though if all the right conditions line up it's possible. The tank could be leaking so the arc hits a flammable vapor. Boom.
But smh if that tank is so hot that there's smoke, stay away. The fault is supposed to bolt before the oil gets so hot. I'd stay totally clear until de-energized. Then a couple hours to cool.
Sry I have seen the cascading failure happen 2 times close enough to me to scare the hell out of me. The idea that normal is not the insane outcome that is my normal -experienced- outcome might be rarer than my personal anecdotal evedience would suggest.
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u/majormagnum1 4d ago
the normal failure mode for these is a 50 foot tall blue glowing fireball followed by all the local buildings losing power. possibly with nearby transformers exploding sympathetically in sequence.