In the 1880’s the development of transformers contributed essentially to the enforcement of alternating and three-phase current technology. Transformers enable the transmission of electrical energy using the voltage adapted to power and distance. A three-phase transformer is made of three sets of primary and secondary windings, each set wound around one leg of an iron core assembly. A three-phase transformers must have (3) coils or windings connected in the proper sequence in order to match the incoming power.

Three-Phase delta wye Circuits Diagram Three phase transformer core has three sets of windings. Those sets of primary and secondary windings will be connected in either ? (delta) or Y (wye) configurations to form a complete unit. The three primary windings (P1, P2, P3) will be connected at the factory to provide the proper sequence (or correct polarity) required and will be in a configuration known as Delta. The three secondary windings (S1, S2, S3) will also be connected at the factory to provide the proper sequence (or correct polarity) required.

Find more detail discussion on Three-Phase Transformers Circuits Diagram here:
Three-Phase Transformers Circuits Diagram – link (source: www.allaboutcircuits.com)
3 Phase Electrical Power Transformer – link (source: www.3phasepower.org)
Three-phase electric power – link (source: www.wikipedia.org)



Related Post

Honda Prelude IV (92-96) Electrical Wiring Diagram
TDA2003 10Watt Car Radio Audio Amplifier Datasheet and Schematic
Best Subwoofer Wiring Diagram Site
1996 Toyota Tercel Wiring Diagram and Electrical System Troubleshooting
Transformer-Coupled SSR Circuit Diagram