April 2015
Beginner
768 pages
23h 29m
English
Content preview from Basic Electrical Engineering
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8
THREE-PHASE AC CIRCUITS
LEARNING OBJECTIVES
After the completion of this chapter, the students or readers will be able to understand the following:
- What is polyphase system?
- Why polyphase system is preferred over single-phase system?
- What are star and delta connections?
- What is the relation between phase and line voltages and phase and line currents in star and delta connections?
- How power is measured in three-phase circuits?
- How power factor of the load affects the readings of two wattmeters used to measure power in three-phase balanced load circuits?
8.1 INTRODUCTION
Although single-phase system is employed for the operation of almost all the domestic and commercial appliances, for example, lamps, fans, electric irons, refrigerators, ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.