Need of energy conservation in transformer: In electrical power system, transformers are used to change the voltage levels of different sections as per the need of economic and efficient operation of the system. Since the transformers are integral part of power system and large in numbers, whether they are on load or no load, they always remain on line. The power losses in windings (no load primary copper losses due to no load current) and magnetic core (due to rated voltage across primary) results in energy wastage. As rated voltage and no load current are there around the clock reduction in these losses in transformer, leads to large amount of energy savings over the period, which can be used for some other good reason. Therefore, there is need of energy conservation in transformer.