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Transformer types course, in this course we will learn about the various Transformer Types, providing a comprehensive understanding of the different transformers used in electrical systems and their specific applications. The course will start with an introduction to the basic principles of transformer operation, including electromagnetic induction and the role of transformers in power distribution and electrical systems. We will explore the different types of transformers, such as power transformers, distribution transformers, instrument transformers (current transformers and potential transformers), auto transformers, isolation transformers, and special-purpose transformers. Each type will be examined in detail to understand its construction, working principles, and typical applications. Participants will learn about the distinctions between single-phase and three-phase transformers, as well as the differences between core-type, shell-type, and toroidal transformers. The course will also cover the specific design and application of dry-type and oil-filled transformers, highlighting their advantages and limitations. Furthermore, we will discuss step-up and step-down transformers, their roles in voltage regulation, and their importance in renewable energy systems and industrial applications. Emphasis will be placed on the practical aspects of selecting the right transformer type for various applications, considering factors such as efficiency, cooling methods, and load requirements.