The main function of transformer in electrical power system is to transfer electrical energy from one electrical circuit to another by changing the value voltage and current either step-up(increase) or step-down(decrease) the voltage and current value without changing the power and frequency of alternating electrical energy.
It is mainly used to step-up the value of voltage at the generating stations as generated voltage is not efficient to transfer a long distance and step-down the value of voltage at the load center or distribution substations to operate low voltage devices and machines efficiently.
Transformer works on the principle of electromagnetic induction. It is constructed with difference in number of turns between primary and secondary winding to change the value of voltage and current from the primary side to secondary side of transformer.
It can be also used to isolate electrically two different electrical circuit but circuits remains connected magnetically.
A special type of transformer called instrument transformer is used to measure the high value of voltage and current safely. Instrument transformer provides safety to both operators and measuring instruments.
Conclusion
Hope, you have clearly understand what is the function of transformer in an electric power system. Make sure to leave your opinion and suggestion about this post in the comment section below.