The “active” part of the Transformer consists of the magnetic core with windings and accessories. The windings are placed over the core limbs and necessary connections are made as per the tappings and vector group. Sufficient ducts are provided between the coils to ensure heat dissipation through circulation of oil. Best quality insulation is provided at all joints and gaps. The optimum design of Core-Coil Assembly is achieved by considering the required technical particulars including cooling, size compactness and tapping arrangement. All leads and conductors are rigidly supported by special clamping arrangement.