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.
15.6 CHAPTER 15 When a load is connected to the secondary winding of the transformer, a current I s will flow in the secondary winding of the transformer. This current is equal to the secondary voltage
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