- What is the definition of apparent power?
-
How to calculate apparent power for three-phase circuit? Is it S = S1 + S2 + S3 or S = sqrt(P^2 + Q^2)
where
P is total active power P = P1 + P2 + P3
and
Q is total reactive power in system Q = Q1 + Q2 + Q3?
Apparent power definition
power
Related Topic
- Electronic – Calculate total apparent, average and reactive power in 3-phase
- Electronic – How to calculate instantaneous active power from sampled values of voltage and current.
- Electrical – How to we visualize active reactive and apparent power as areas in time domain
- Electrical – Effect of Reversed Phase Polarity on Active & Reactive Power of 3-Phase System
- Electronic – Power Factor in Switched Circuits
- Electronic – Why is apparent power more important\relevant than maximum instantaneous power
Best Answer
Apparent power is the vector sum of real power and reactive power. In effect it is V\$_{RMS} \times I_{RMS}\$ without any consideration of phase angle. Because real and reactive power are at right angles, the vector sum is: -
\$\sqrt{Real^2 + Reactive^2}\$
Once you have it for one phase then it you can, just like in real power) multiply by 3 to get the value for a balanced supply/load 3-phase system.