So the power company upgraded me to a 50 KVA transformer after the 25 KVA exploded. I am running 200 amps at 120v constant. Anyone know if this is safe on that size transformer? I dont want to blow another one, they will charge me a ton of money.
Because of the sine form of mains power this 120 V is only the RMS voltage. According to Ohm's law current and voltage are proportional. Constant 200 A gives then sqrt(2) at peak resulting 283 A. But voltage isn't always the same. If the highest value is 6 % over the normal then it would result 300 A peak. The needed capacity is then 36 KVA. 50 KVA should be fine.