Motor Full-Load Current
Estimate AC motor input current from known rated output, voltage, power factor and efficiency. Use the motor nameplate for final protection coordination.
Enter motor data
Use values from the motor or project documentation. No product model is chosen from this estimate.
Method and limits
For a three-phase motor, current depends on mechanical output power, line-to-line voltage, efficiency and full-load power factor. For single-phase input, use supply voltage without the √3 factor. This estimate does not derive a relay setting or claim product compatibility.
- Enter mechanical output kW, not electrical input kW.
- Use the motor's rated operating data where available.
- Confirm starting, duty and protection coordination separately.
Technical background: ABB motor technical guide.