Electrical Calculators
Three-Phase Current Calculator
Calculate full-load current of a 3-phase motor.
Inputs
Result
Full load current
28.3A
Formula
I = (P × 1000) / (√3 × V × PF × η)
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Formula
I = (P × 1000) / (√3 × V × PF × η)
Worked example
(15 × 1000) / (1.732 × 400 × 0.85 × 0.9) ≈ 28.3 A
FAQ
+What efficiency is typical?
IE3 motors: 0.88–0.95 depending on size.
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