Explain the use of voltage transformer and current transformer in transformer station

Question

I bought a transformer and had studied theoretically how it works but i saw phase shifting etc. and ideal is not so real in real world. would there be a lagging or leading of phase in a transformer? no circuit load involve. What will it be then and how much is the discrepancy? I plan to create a diy watt meter, voltage and current input is important but i want isolation so i used transformer but i know phase is important when reading voltage and current right?

Answer 1

Voltage transformer is a low power (low current) transformer, whole sole function is to provide a lower output voltage in fixed proportion to input voltage on primary side. These transformers are commonly used for measurement of higher voltages, by connecting voltmeter on secondary output.

A current transformer is a device used to produce an alternating current in its secondary, which is proportional to the AC current in its primary. This is primarily used when a current or voltage is too high to measure directly. The induced secondary current is then suitable for measuring instruments or processing in electronic equipment, which typically needs isolation between the primary and secondary circuit.