1.1.4 How is the active power factor cos φ of a 400V cast iron motor calculated?
A 4.0 kW three-phase motor (or 400V electric motor) has an apparent power of 4.7kVA. What active power factor cos phi results from this information?
cos φ = P / S
cos φ = 4.0kW / 4.7kVA
cos φ = 0.851
Active Power P = Kilowatt [kW]
Apparent Power S = Kilovolt Ampere [KVA]
cos φ = no measuring unit