Transformer Dot Convention 

Created: 5/20/2020Last Updated: 07/06/2023


The dot convention is a notation used to indicate the phase relationships between voltage and current in primary and secondary windings of a transformer. Depending on how the windings are wound around the transformer core, the phase relationship can be either in-phase or 180 degrees out of phase.

Rule of Thumb

Detailed Explanation

Reference and Further Reading: