Transformers are static devices that transfer electrical energy from one circuit to another by the phenomenon of electromagnetic induction without any change in frequency. They can link circuits that have different voltages, which is one of the enabling factors for the universal use of the alternating current (AC) system for the transmission and distribution of electrical energy. Hence, transformers ensure that various components of the power system, viz. generators, transmission lines, distribution networks and loads, can all be operated at their most suitable voltage levels. As transmission voltages are increased to higher levels in some parts of a power system, transformers again play a key role ...
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