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Total Power from Unbalanced Heating Amp Measurements

Total Power from Unbalanced Heating Amp Measurements

Total Power from Unbalanced Heating Amp Measurements

(OP)
Do I need to do phasor calcs on a system ?

Voltage = 204 206  209
Amps = 32  42  53

What is the power in kW?

P= Pa + Pb + Pc   ????

RE: Total Power from Unbalanced Heating Amp Measurements

You can add the power from each phase,once you know the power,  but you don't have enough information to calculate power.  You need the power factor of each phase, or the angle between the current and voltage.  With current and voltage, you only know kVA, not kW.  

Also, if you're going to calculate on a per phase basis, you'll want to use to the line-to-neutral voltage, so assuming this is a 208/120V system, divide those voltages by 1.732.

RE: Total Power from Unbalanced Heating Amp Measurements

(OP)
The PF is unity.  

RE: Total Power from Unbalanced Heating Amp Measurements

If so, then yes you can compute the power.

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