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Exercise on a three-phase system where to evaluate the indication of the wattmeter

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pizzico85

Joined Feb 9, 2015
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Hi all, I am new to this forum and I hope you can help me.

I have the following three-phase system where I have to evaluate the indication of the wattmeter W. Available data is: V = 380 V, R = 12 Ohm, R' = 120 Ohm.

IMG_0087.jpg

Can you make me understand the process for obtaining W?
 
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