(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Wattmeters are in the lines B and C of a three-wire, 173.2 volt, CBA system which supplies a balanced load. Find the wattmeter readings if line current Ia= 32.7 angle of (-41.9). Answer: 1170, 5370 w

2. Relevant equations

Wb= Vba Ib cos ( angle between Vba and Ib)

Wc= Vca Ic cos (angle between Vca and Ic)

Wb+Wc = 3 phase power

Wc-Wb = 3 phase reactive power

3. The attempt at a solution

I have solve for Vba , Vca Ic and Ib by phasor method..

Wb = (173.2 ) (32.7) cos ( 180- 78.1)

Wb= - 1167.87 w

Wc= (173.2) (32.7) cos (161.9 - 120)

Wc= 4215.5 w

my problem is when i checked my answer on the book my answers are not like in the book..

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Two wattmeter method question

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