ClueLuma

Balanced three-phase line current calculator

Line current is calculated as 1000 × P/(sqrt(3) × V_LL × PF). Use the stated system boundary and matching input units.

I=1000×P3×VLL×PFI = \frac{1000 \times P}{\sqrt{3} \times V_{\text{LL}} \times \mathrm{PF}}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

kW
V
—
A

Worked example

Given

  • PP = 200 kW
  • VLLV_{\text{LL}} = 480 V
  • PF\mathrm{PF} = 0.85 —
I=1000×2003×480×0.85≈283I = \frac{1000 \times 200}{\sqrt{3} \times 480 \times 0.85} \approx 283

Symbols and units

SymbolMeaningUnit
IIline currentA
PPreal powerkW
VLLV_{\text{LL}}line voltageV
PF\mathrm{PF}power factor—

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.