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mansoor_vm
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Join Date: Jul 2010
Posts: 39

Power Measurement - Three Phase Circuit

01/02/2011 5:57 AM

I want to measure power in a three phase circuit . I know the voltage between the phases,Power factor and individual phase current which varies from each other So which phase current i have to take for calculating overall power consumption?
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TonyS
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#1

Re: Power Measurement - Three Phase Circuit

01/02/2011 9:58 AM

All 3 and use √3 voltage

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mansoor_vm
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#3
In reply to #1

Re: Power Measurement - Three Phase Circuit

01/03/2011 8:55 PM

Thanks But I have doubt whether it is √3*V*I*powerfactor or 3*V*I*powerfactor
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TonyS
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#4
In reply to #3

Re: Power Measurement - Three Phase Circuit

01/04/2011 7:03 PM

((I1+I2+I3)*(V*√3))*Cosθ

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Anonymous Poster
#2

Re: Power Measurement - Three Phase Circuit

01/02/2011 10:22 AM

For power measuring, use power meter, power monitoring units etc. For calculating use as given above answer by Tonys. It is suggested to have read again the basics of electrical theory.
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Anonymous Poster
#5

Re: Power Measurement - Three Phase Circuit

01/05/2011 4:52 AM

Yes..Calculate the power in each phase and add up for getting the total power. Since u know the phase voltages, currents and PF u can calculate the power consumed by each phase, and the sum is the total power drawn by the load.
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Anonymous Poster
#6

Re: Power Measurement - Three Phase Circuit

01/06/2011 2:02 AM

Line current,line voltage,3 phase power
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