how to calculate KVA in a single and a three phase system

how to calculate KVA in a single and a three phase system

1. Single phase voltage

KVA = I × V / 1000

Example:

I = 5
V=230

KVA =5 I ×230 V / 1000

KVA   = 1.15 KVA

2. Three phase voltage

KVA =  √3 × I × V / 1000

Example:

I= 5
V=415

KVA = √3 × 5I ×415 V / 1000

KVA  = 7.1878 KVA