Low voltage transformers are very beneficial and are present in lifestyle, even when we do not see them. A transformer is electrical equipment that changes current inside it from the higher voltage to a lower voltage or from a lower to the higher, depending on your requirements and needs. To do this it uses magnetic and various other electrical properties and functions. Before the lights keep on working in your house or any house on the earth for that matter, electricity has traversed several miles and has changed many times before it's made practical and cheap to us. Low voltage transformer is the last connection and change before it enters into our homes. Consider the city of Malibu in CA for example. They do not manufacture electricity for his or her use so it has to come from somewhere else.
It should travel long distances through wires that are exposed to the climate, the sun and the cold. Electricity while travelling produces heat and plenty of it's also wasted into the air. This is why before it starts on its trip from the dam or nuclear generator where it's produced; it's turned into higher voltages by high voltage transformers hence more can be sent simultaneously with the same amount of loss.
Note that the electricity is set to high voltage travelling through the big electrical towers with the thick wires. Such can be found all across the world carrying more than thirty thousand volts in every line. As it moves towards Malibu, some of its deviated into a toroidal power transformer that feeds step down transformers that gradually lessens the voltage to the 120 volts that may be utilized in our homes in spite of what town or cities along the west coast.
