Calculation
P = √3 · U · I · cosφ
√3 applies to line voltage and balanced load; cosφ accounts for phase shift.
P = √3·U·I·cosφ
Three-phase AC power
√3 applies to line voltage and balanced load; cosφ accounts for phase shift.
MINTSI
02
Result
Select a target and calculate.
Understand the inputs
- Real power P — Consumed real power.
- Line voltage U — RMS voltage between two line conductors.
- Line current I — RMS current per line.
- Power factor cos φ — Ratio of real to apparent power.
Example
√3 · 400 V · 10 A · 1 = 6.93 kW.
Assumptions and limits
Balanced 50 Hz system; harmonics and imbalance are excluded.
Sources