The most significant material in a transformer is the magnetic core. FLT’s uses high quality Cold Rolled Grain Oriented Silicon Steel to ensure optimum losses and most efficient working of the Transformer. The type of magnetic steel is chosen according to the desired loss level. The lamination are cut geometrically to ensure optimum flow of magnetic flux and minimum air gap between the joint of two consecutive sheets. The supporting structures and clamping devices of the core contribute to the compactness of the design and also ensure low sound levels.