DOE-HDBK-1016/1-93ELECTRICAL DIAGRAMS AND SCHEMATICSElectrical Diagrams and Schematicsdepicting three-phase systems, a small symbol may be placed to the side of the transformerprimary and secondary to indicate the type of transformer windings that are used.Figure 16 (A) shows the most commonly used symbols to indicate how the phases are connectedin three-phase windings. Figure 16 (B) illustrates examples of how these symbols appear in athree-phase single line diagram.Figure 16 Three-Phase SymbolsPR-03Rev. 0Page 16
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