Input Parameters
About This Calculator
- 3φ: I = P×1000/(√3×V×η×cosφ)
- 1φ: I = P×1000/(V×η×cosφ)
- Starting-current factors are rough model assumptions; actual starting current depends on motor and installation data.
How this motor current calculator works
The operating-current estimate uses the entered power, voltage, efficiency, and power factor. The estimate changes with those assumptions; starting current also depends on the selected rough factor.
The selected starting-current factor is a rough estimate. Actual starting current depends on the motor, controller, load, supply, and manufacturer data.
FAQ
Motor current formula?
3φ: I = P×1000/(√3×V×η×cosφ).
Starting current?
Starting current varies by motor and installation. The calculator applies a rough selected factor, not a verified motor value.
No-load current?
It varies by motor. This calculator shows a model assumption; use manufacturer data for actual values.