1. Three-Phase Power

2. Definitions 4 wires –3 “active” phases, A, B, C –1 “ground”, or “neutral” Color Code –Phase ARed –Phase BBlack –Phase CBlue –NeutralWhite or Gray

3. Phasor Diagram

4. Delta-Connected Sources V LINE = V 

5. Phasor Diagram, V AB as reference

6. Look at the Currents I  = I LINE /  3

7. Y-Connected Sources

8. Phasor Diagram with A as reference

9. Complete Phasor Diagram V LINE =  3V 

10. Look at the Currents I  = I LINE

11. Three-Phase Bridge Rectifier

12. Conduction Sequence

13. Average Output Voltage, V dc

14. rms Output Voltage

15. Diode Currents

16. Transformer Secondary Current

17. Instantaneous Output Voltage