9. Three-phase Systems and Circuits
CHAPTER OBJECTIVES
After carefully studying this chapter, you should be able to do the following:
➢State the advantages of three-phase system over single-phase system.
➢Explain how three-phase voltages are generated.
➢Distinguish between a balanced supply and unbalanced supply system.
➢Distinguish between a balanced load and an unbalanced load.
➢Write the relationship between phase and line quantities in a star- and delta-connected system.
➢Distinguish between active power and reactive power.
➢Calculate current, power, and power factor of balanced three-phase loads.
➢Make connection diagram and measure power and power factor in a three-phase balanced and unbalanced load.
➢Convert a star-connected load into ...
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