Transcription of CHAPTER 15 DISTRIBUTION TRANSFORMERS
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CHAPTER 15 DISTRIBUTION TRANSFORMERS
13/07/06 11:43AM Page CHAPTER 15. DISTRIBUTION . TRANSFORMERS . The purpose of a DISTRIBUTION transformer is to reduce the primary voltage of the electric DISTRIBUTION system to the utilization voltage serving the customer. A DISTRIBUTION trans- former is a static device constructed with two or more windings used to transfer alternating- current electric power by electromagnetic induction from one circuit to another at the same frequency but with different values of voltage and current. Figure shows DISTRIBUTION TRANSFORMERS in stock at an electric utility company ser- vice building. The DISTRIBUTION TRANSFORMERS available for use for various applications, as shown, include pole-type (Figs. and ), pad-mounted (Fig. ), vault or network type (Fig. ), and submersible (Fig. ). The DISTRIBUTION transformer in Fig.
DISTRIBUTION TRANSFORMERS 15.3 FIGURE 15.3 Two view construction standard detail of a conventional transformer to be installed on the distribution system. Note the fused cutout and lighting arrestor combination external to the transformer. (Courtesy MidAmerican Energy Co.)FIGURE 15.4 Three-phase pad-mounted transformer installed in shopping center
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