how to calculate kva for 3 phase transformer?

To calculate the kVA rating for a three-phase transformer, use the formula: kVA = (Voltage � Current � ?3) / 1000. Here, Voltage is the line-to-line voltage, and Current is the rated current of the transformer. Ensure that both voltage and current are in appropriate units (volts and amperes) to obtain the kVA in kilovolt-amperes. This calculation helps determine the transformer’s capacity to handle electrical loads efficiently.