The rated current of 380V is 15A. After passing through the transformer, the voltage is 220V V V. What is the rated current at this time and how to calculate it?

Not counting the loss, 380v* 15a=5700 watts, and 5700 watts of 380 V 15A are converted into 220 V voltage through the transformer, and the current of 5700/220=26 is twenty ampere. The calculation method is as follows