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The transformer basically consists of two coils having mutual inductance and laminated steel core. The coils are insulated from each other and the steel core. Other necessary parts are: Some suitable container for assembled core and windings. a suitable medium for insulating the core and windings from the container. suitable bushings for insulating and bringing out the terminals of windings from the tank. In all types of transformers the core is constructed of steel sheet laminations assembled to provide a continuous magnetic path with a minimum of air gap included. The steel used is of high silicon content. The eddy current loss is minimized by laminating the core. The thickness of the laminations varies from 0.35mm for a frequency of 50 Hz to 0.5mm for a frequency of 25 Hz. The sheets are imbricated to avoid the narrow gaps through the cross section of the core. Types of Transformers On the basis of construction, transformers are of two types: 1. Core T...