The Complete Information Guide. March 27, 2024. By Ravi Teja. In this tutorial, we will learn about Autotransformers. This is a complete guide to theory and design of Autotransformer, its efficiency numbers, electrical symbols, starting technique, protection measures, advantages, disadvantages, applications and many more. Outline.. What Is Electrical Transformer; Advantages of Auto Transformer. The following are some of the advantages of using an auto transformer: For a transformation ratio of 2, the auto transformer would be around half the size of a two-winding transformer. The size would be 95 percent for a transformation ratio of 20, for example.
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Autotransformer Terminal Markings. An autotransformer is used mainly for the adjustments of line voltages to either change its value or to keep it constant. If the voltage adjustment is by a small amount, either up or down, then the transformer ratio is small as VP and VS are nearly equal. Currents IP and IS are also nearly equal.. Disadvantage of Auto Transformer: As seen earlier in this post that saving of conductor in Auto Transformer is k so saving in conductor decreases as the value of voltage ratio k decreases. Another biggest disadvantage of Auto Transformer is direct electrical connection between the Primary and Secondary circuit. If Primary is supplied with high.
