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An autotransformer is an electrical transformer with only one winding. The "auto" (Greek for .. Print/export. Create a book · Download as PDF · Printable version An auto transformer is the one which consists of a single winding, part of which The internal construction of an auto transformer is shown in the figure below:. Electrical Tutorial about the Autotransformer and the Variable Auto The construction of a variable autotransformer, or variac, is the same as for the fixed type. In Auto Transformer two windings are not only magnetically coupled but also electrically coupled. The input Less copper is used in its design and construction. In this lesson we shall learn about the working principle of another type of transformer called autotransformer and its uses. The differences between a 2-winding The working principle of autotransformer and construction is similar to that of conventional two winding transformers. However, it differs in the way in which the There are two types of auto transformer based on the construction. In one type of transformer, there is continuous winding with the taps brought out at convenient Advantages of Auto-transformers. “The KEY is kVA transformation”. ? Lower weight (lower cost). ? Lower losses (higher efficiency). ? Better regulation as lower Advantages of Auto-transformers. “The KEY is kVA transformation”. ? Lower weight (lower cost). ? Lower losses (higher efficiency). ? Better regulation as lower An auto transformer is an electrical transformer having only one winding. The winding has at least three terminals which is explained in the construction detailsAn autotransformer is an electrical transformer having only single winding which acts as both primary Construction, Principle of Operation Of Auto Transformer:.