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Power Triangle - kVA / kW / kVAR

Relate apparent (kVA), real (kW) and reactive (kVAR) power via the cos φ power factor.

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Formula, assumptions, and limits

S2=P2+Q2,P=ScosφS^2 = P^2 + Q^2, \quad P = S \cos\varphi
SymbolMeaningUnit
PPReal powerkW
SSApparent powerkVA
QQReactive powerkVAR
cosφcos φPower factor

Source: IEC 60034 - Rotating electrical machines

In short

Relate apparent (kVA), real (kW) and reactive (kVAR) power via the cos \u03c6 power factor.

Learn the theory Marine Electrical Generation and Distribution