How is current in a transformer winding calculated when connected delta?

In a delta-connected transformer winding, the relationship between line current and winding current is based on the properties of the delta configuration. In this setup, each phase winding is connected in a triangular formation, which influences how currents flow through the system.

In a three-phase delta system, the line currents are greater than the phase currents (winding currents). The line current is equal to the square root of three (approximately 1.73) times the winding current. Therefore, to find the winding current from the line current, you divide the line current by 1.73. This calculation reflects that each line current supplies two phase windings in the delta configuration.

This relationship is essential for understanding how transformers operate within three-phase systems, especially regarding load calculations and ensuring that circuits operate efficiently and safely.