A transformer is a static gadget which exchanges AC electrical power from one circuit to the next at a similar recurrence, however the voltage level is generally changed. For economical reasons, electric power is required to be transmitted at high voltage while it must be used at low voltage from a safety perspective. This expansion in voltage for transmission and diminishing in voltage for usage can only be accomplished by utilizing a step up/ down transformer. The significant distinction between a step up and a step down transformer is that step up transformer raises the yield voltage, while step down transformer decreases the yield voltage. Some different contrasts among the two are in terms of elements such as voltage, winding, the quantity of turns, thickness of conductor and application.