Why is it preferred to use a wattmeter(s) to measure power
in three phase systems rather than using a combination of
other instruments e.g. voltmeters, ammeters etc?
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Answer Posted / ravikumar.g
The wattmeter is using for find out the power in 3 phase
and single phase in differnet formulas.
In the voltmeter and ammeter reading can also find out the
power to caluculate the formulas.
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