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Motor Control VFD & Drives Power Quality MCC & Control Panels Industrial Power

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Engineering Notes

Motor Control VFD & Drives Power Quality MCC & Control Panels Industrial Power

Engineering Tools

Drive System AnalyzerThermal AnalyzerFuture Tools

Resources

Calculations References About Contact

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Calculations

Motor Current Calculator

Estimate RMS motor line current from mechanical shaft/output power, supply voltage, power factor, and efficiency.

Power unit Motor output power Voltage V Phase Power factor Greater than 0 and no more than 1. Efficiency %

Calculated line current

—A

Relationship

Three-phase: I = Pout / (√3 × VLL × PF × η)

Single-phase: I = Pout / (V × PF × η)

Engineering note

Entered hp or kW is mechanical shaft/output power. The result is an estimated RMS line current at the stated voltage, power factor, and efficiency; it is not a substitute for motor nameplate FLA.

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