how to size a transformer for a 3 phase motor?

To size a transformer for a three-phase motor, first determine the motor’s full-load current (FLC) using its power rating (in kW) and voltage. Use the formula: FLC = (Power in kW � 1000) / (?3 � Voltage). Next, consider the transformer’s efficiency and any additional load requirements. Select a transformer with a rating that exceeds the calculated current, typically adding a safety margin of 10-20% to accommodate inrush currents and future expansion.