An electrical substation is the point in the electrical Transmission-Distribution system, where the transformation of voltage form high level to low level or the vice versa happens. The voltage is either stepped up or stepped down at a substation and this is done with the help of large power transformers within the substation.

A Transmission substation transforms the voltage to a level suitable for transporting the electric power over long distances. This is to minimize the capital and operati...
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