January 2013
Intermediate to advanced
598 pages
22h 47m
English
Content preview from Electrical Technology, Volume 1
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17
Three-phase Circuits and Systems
OBJECTIVES
In this chapter you will learn about:
- Single-phase supply
- Three-phase supply
- Star connection and IL = Ip and VL = √3 VP
- Delta connection and VL = Vp and IL = √3 Ip
- Comparing star and delta connections
- The Y–Δ change-over switch
- Balanced and unbalanced loads
- Advantages of three-phase systems
Three-phase Voltage
17.1 INTRODUCTION
When a piece of electrical equipment is plugged into the socket of a normal alternating current supply, it is connected between the terminal of one phase and the neutral wire, as shown in Figure 17.1. Thus, a normal alternating current circuit may also be described as ...
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