how to calculate kva of a three phase transformer?

To calculate the kVA (kilovolt-amperes) of a three-phase transformer, use the formula: kVA = ?3 � V � I, where V is the line-to-line voltage in volts and I is the current in amperes. This formula accounts for the three-phase power system’s characteristics. Ensure that both voltage and current are in their respective units to obtain the kVA rating accurately. This calculation helps determine the transformer’s capacity for load handling.