Transformer Explosion! Colors?

We believe a transformer exploded about 100 ft east from our house. There was a tremendous boom followed by many, eerie aqua blue flashes that buzzed. Yet, I used to watch tranformers explode during thunderstorms, and they’d flash one green flash and die. Also, it’s odd that none of the surrounding area appeared to have lost power. (This was well after dark, so it would be obvious.)

I was the first to report it to 911, and I thought there may have been a train derailment as the flashes continued…fearing the worst, I guess. (Tracks are 1/2 mile east of me and maybe 25-ft below grade in a ravine.) When I went to investigate (passing through my tree-lined, half-acre of a backyard), the fire trucks had already arrived, and it was hard to tell just what happened. All I could see was a small fire on the ground. At that point, the houses are hidden from the road, so maybe a handful of people lost power? I will check tomorrow, but I strongly WAG if a transformer, it was a box on the ground, and not a cylinder-like container on a pole, if that matters. I also WAG it is beyond the age of PCBs…if that affects the color of the explosion, too?

So, do aqua or turquoise flashes match a post-PCB era transformer explosion? Or, should I have still seen bright green flashes due to the high copper content? And, if not, what else could it have been? (The sky looked like ET just crash-landed across the street!)

Trying to piece it all together prior to seeing what I can learn tomorrow,

  • Jinx

The green color is from burning copper.
You may have had an aluminum wound transformer

was totally thinking this was a joke thread for several seconds… :smack:

Don’t worry, so did I :smiley:

Uhm, so like this guy thinks he had Optimus Prime near his house, and he blew up:stuck_out_tongue: :smack:

Well, electricity just arcing through air makes a blue flash.

You can search for transformer explosions on youtube. I don’t think this one will help, but I’ll post it because it’s cool: http://youtube.com/watch?v=fzbQjd_Oo4Q

Vaporizing copper, actually. The energy in a high-voltage, high-current arc flash such often occurs in a transformer failure is tremendous. Stuff near the flash gets heated to thousands of degrees almost instantaneously due to radiant energy. This radiant energy is responsible for the most severe injuries in an arc-flash incident, setting the victim’s clothing on fire and giving third degree burns to exposed skin instantly.