Step up Transformers

Transmission Lines Picture Large amounts of electric energy are generated at power plants which are usually located long distances from users. Because of resistance in transmission wires, some of this power is lost in moving the power through the wires. There are two choices to decreasing or limiting the power lost in the wires. Step Up Transformer PictureOne, make the wire a larger diameter or two increase the voltage pushing the electricity through the wire. Increasing the size of wire is too expensive so the common method of limiting line losses is to raise the voltage.

Step-up transformers perform this task and are generally located at the generating station. They get their name because they literally "step-up" or increase the voltage level from that which it is generated at to a sufficient level for transporting long distances.