Free tools
Three-phase current calculator
Convert a three-phase kW or kVA load into line current. Use 400 V, 525 V or a custom voltage, with power factor and efficiency.
Free tools/Three-phase current
Results
Three-phase line current
I = S / (√3 × VL), with S from kW / (pf × η) when you enter active power.
Line current
135,5 A
Ib for cable and breaker sizing
Apparent power
93,9 kVA
Active power
75,0 kW
Reactive power
49,4 kvar
Phase current (star)
135,5 A
Iphase = Iline
Phase current (delta)
78,2 A
Iphase = Iline / √3
Assumes a balanced three-phase load at 50 Hz. Starting current, harmonics, and diversity are not included. These calculators are free design aids, not a substitute for the published standard, manufacturer data, or a competent person.