Came a cross an unusual situation. A hotel with a 480V service was supposed to have PTAC air conditioners rated for 277V.
Apparently they came as 208-230/1/60. The solution that was used was transformers with 480Y primary and 416/240 secondary.
All the air conditioners are then powered via single pole 240V breakers. A hot with a neutral.
Small fan coils etc, can be ordered as 277V, but usually they come with their own little transformers.
Anyone ever come across this, equipment fed with a 240 hot and a neutral?
