Power Transformers: Principles and ApplicationsComplete with equations, illustrations, and tables, this book covers the basic theory of electric power transformers, its application to transformer designs, and their application in utility and industrial power systems. The author presents the principles of the two-winding transformer and its connection to polyphase systems, the origins of transformer losses, autotransformers, and three-winding transformers and compares different types of transformer coil and coil construction. He describes the effects of short circuits on transformers, the design and maintenance of ancillary equipment, and preventative and predictive maintenance practices for extending transformer life. |
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applied assumed autotransformer bank base bushings calculated cause Chapter circuit coil common conductor connected contacts cooling core core form diagram direction distribution effective electrical Engineers equal equivalent circuit Example exciting failure fault flow flux forces former ground harmonic high-voltage impedance increase indicates induced insulation leads leakage limit lines load load current losses low-voltage lower magnetic magnitude measured method nameplate networks neutral normal occur operating output parallel path peak phase phase sequence positive power transformers pressure primary and secondary primary winding provides ratio reduced reference regulation resistance secondary voltage secondary windings series winding short-circuit shown in Figure shows side single-phase standard supply Table tank tap changer temperature terminals three-phase trans turns two-winding transformer types unit usually values vector voltage zero zero-sequence