how to calculate the kva rating of a three phase transformer?

To calculate the kVA rating 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. Ensure that both voltage and current are in their respective units. This formula accounts for the three-phase power factor, providing an accurate kVA rating essential for transformer sizing and application in electrical systems.