Power transformer action is multifaceted, not only can increase the voltage of the power supply for the region, and the voltage is reduced to the use of voltage levels to meet the power demand. In short, step-up and step-down must be done by the transformer. In the power system in the power transmission process, there will be two parts of the voltage and power loss, the use of transformers can increase the voltage and reduce the transmission loss.
The transformer consists of two windings on the same core of two or more coil windings that interact with the alternating magnetic field in contact with the electromagnetic induction between the windings. Transformer installation location should be considered easy to operate, maintenance and transportation, and should choose safe and reliable place. When using the transformer, the rated capacity of the transformer must be selected reasonably.