1.1.4 How do you calculate the power factor cos φ of a 400V cast iron motor?

An example:

A 4.0 kW three-phase motor (or 400V electric motor) has an apparent power of 4.7 kVA.
What power factor cos phi results from this information?

cos φ = P / S
cos φ = 4.0kW / 4.7kVA
cos φ = 0.851

Units of measurement:

Active power P = kilowatt [kW]
Apparent power S = kilovolt-amperes [kVA]
cos φ = no unit of measurement

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