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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

AC Power Triangle Calculator

Solve common single-phase and three-phase AC power relationships using a practical set of known-value modes.

Solve mode Power factor type Phase Voltage V Current A Power factor Greater than 0 and no more than 1. Active power kW Apparent power kVA

Calculated values

Active power— kW

Apparent power— kVA

Reactive power— kvar

Power factor—

Line current— A

Relationship

S² = P² + Q²

PF = P / S

Engineering note

Positive kvar represents lagging/inductive reactive power. Negative kvar represents leading/capacitive reactive power. Voltage is line-to-line for three-phase calculations and line voltage for single-phase calculations.

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