How and why are transformers used on electric wires?

A transformer is a two coil component that uses electromagnetic induction to pass an AC signal from its input to its output.





鈥ow and why are transformers used on electric wires? What would be their purpose?


鈥hy do we hear that these transformers break at times?|||Transformers are mainly used to step up or down of a voltage. For example, generators output are normally in the magnitude of 100 volts per phase or so for a 3 phase system. When the output is to be delivered to the users, sometimes, it could mean 100's of miles away. We all know loss will naturally occurs during the travel of the power. So it would be necessary to jack the voltage up to thousands of volt at the source and then at the substations local to the users return to the normal main voltage, such as 240 volt in UK and 110 voltages in USA. The process is done by transformers and can only be done by AC (not DC) system by making use of the turns ratio of the Input/Output of the transformers.


Transformers carry power and sometimes the insulations between wires in the coils breakdown which in turn causes transformers to breakdown.|||1. Transformers are used to step up (or step down) AC voltage/current. Further, they can provide electrical isolation from two circuits (There is no physical connection between the two sides of a transformer).





2. Transformers can break for a lot of reasons, i.e. excessive heat, too large of a load, environmental breakdown, faulty manufacturing, etc...