Answer Posted / rms

the purpose of transformer is to convert the voltage at a
higher level or lower level depending on what purpose it
will be used. Step up transformers are seen at power plants
and substations so that it can transmit power at very long
distances. Step down transformers are seen attach at
electric post or even in electronic components..

A current transformer and potential transformers are very
important and only seen at thousand volts stations. Since u
cannot directly connect a kilowatt hour meter or other
relaying stuff at thousand volts because it will explode.
You need this ct's and pt's which will adjust the level of
the voltage at a certain ratio where it is now safe to
connect this meters and relaying stuff...

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