I have to calculate Power consumption of my Device basically it run on DC -48 volt but actually I have to calutale power consumption of AC I use rectfire to convert 220 Ac into dc -48


I have to calculate KVA ?

V=220v
P=700W
3 Phase
and
1 Phase

This smells like a homework problem. It also hint like you were not paying attention.

Care to try your luck at attempting the problem and tell us why?