Doubt 480v
With a industrial electrical background I can say that only a fool would have a system that could in any way "combine" in series to supply 480v.
It doesn't seem logical either, because for that to happen the systems would need to be in series to begin with, that just seems highly unlikely, only someone who doesn't understand the basics of electricity would do something like that.
What I see more likely to have taken place was a failure of the generator / battery system and someone instead throwing mains feeds straight into the barn. The load is excessive and the voltage being so far out causes some of the supply units to go pop or for breakers to even get thrown off again, they cycle the power again trying to fix the issue but it doesn't help. Hook up enough smps units and try to power them all at once on a leg that cant support the starting current and you will see it happen every time!..
Inrush current of 100 amps for one computer is bad, about 20x max load, so if you imagine this in a data center with some fool turning everything on at once, melted lines and dead equipment does seem possible.
Biting the hand that feeds IT
