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Option 2 : Instrument transformer is used
The voltage and current level of power system is very high. It is very difficult and costly to design the measuring instruments for measurement of such high level voltage and current. The measurement of such very large electrical quantities, can be made possible by using the Instrument transformers with these small rating measuring instruments.
Instrument Transformers are used in AC system for measurement of electrical quantities i.e. voltage, current, power, energy, power factor, frequency. Basic function of Instrument transformers is to step down the AC System voltage and current.
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