What is Polarity Test of Transformer ?Polarity Test DefinitionA polarity test of transformer is a method to ensure correct polarity alignment when connecting transformers in parallel.Dot ConventionThe dot convention identifies the polarity of windings in a transformer, showing how voltage is induced. If a current enters the dotted terminal of one winding, then the voltage induced on the other winding will be positive at the dotted terminal of the second winding. If a current leaves the dotted te