Transformer Connections Part 2

Introduction Describe the basic requirements for connecting units together to form a three-phase bank. Explain connection principles and theory using phasor diagrams. Demonstrate and explain that delta-wye and wye-delta three-phase connections have angular displacements of 30 degrees. Delta-Wye Connections Demonstrate and explain how a delta-wye three-phase connection producing 30 degrees of angular displacement is made using subtractive-polarity transformers. Wye-Delta Connections Demonstrate and explain how a wye-delta three-phase connection producing 30 degrees of angular displacement is made. Alternative Connections Demonstrate and explain phasor diagrams and angular displacement using alternative connections. Demonstrate and explain how an alternative delta-delta three-phase connection producing 180 degrees of angular displacement can be made. Demonstrate and explain how an alternative wye-delta three-phase connection producing 210 degrees of angular displacement can be made. Open Banks Demonstrate and explain an open delta-delta connection producing 0 degrees of angular displacement. Demonstrate and explain an open wye-delta three-phase connection producing 30 degrees of angular displacement. Additional Three-Phase Connections Demonstrate and explain one example of a three-phase transformer.