Transformers are static electrical devices with no moving parts, transforming power from one voltage and current setting to another. The frequency of the remains constant. classified by their function, which is either step up or down. Step-up transformers increase incoming current, while step-down decrease current’s voltage. referred as primary voltage, outgoing stream secondary. Generally, step-up located at generation plants, stepping flowing plant long-distance distribution networks. Step-down transformers, on other hand, streams received local level. first stepped down a level acceptable for distribution, then again each consumer node (residential homes offices).