Transformer Polarity and Wiring Groups mainly describes the connection, polarity determination and wiring group of transformers. It is divided into five chapters: single-phase transformer polarity, three-phase transformer connection and polarity, three-phase transformer wiring group, selection of three-phase transformer group when running in parallel in power system, and three-phase transformer wiring group test. The book is accompanied by a large number of figures, and the explanation is vivid and intuitive. This book is suitable for technical managers engaged in transformer design, manufacturing and related work, and can also be used as a reference book for power professional learning. Transformer polarity and connection group Contents Chapter 1 Polarity of single-phase transformer Section 1 Significance of polarity Section 2 Relationship between transformer parallel operation and polarity Section 3 Polarity test of single-phase transformer Chapter 2 Connection and polarity of three-phase transformer Section 1 Connection of three-phase transformer Section 2 Polarity of three-phase transformer Section 3 Polarity test of three-phase transformer Chapter 3 Connection group of three-phase transformer Section 1 Connection group and clock representation Section 2 Steps and methods of connection group Section 3 Standard connection group Section 4 Changing connection group without changing the internal connection of transformer Chapter 4 Selection of connection group when three-phase transformer is in parallel operation in power system Section 1 Relationship between connection group and parallel operation of three-phase transformer Section 2 Selection of connection group of three-phase transformer in power system Chapter 5 Connection group test of three-phase transformer Section 1 AC method Section 2 Phase table method Section 3 DC method
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