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Practical values of power factor

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General rules of electrical installation design
Connection to the MV utility distribution network
Connection to the LV utility distribution network
MV and LV architecture selection guide for buildings
LV Distribution
Protection against electric shocks and electric fires
Sizing and protection of conductors
LV switchgear: functions and selection
Overvoltage protection
Energy Efficiency in electrical distribution
Power Factor Correction
Power harmonics management
Characteristics of particular sources and loads
PhotoVoltaic (PV) installation
Residential and other special locations
ElectroMagnetic Compatibility (EMC)

Average power factor values for the most commonly-used equipment and appliances

(see Fig. L6)

Equipment and appliances cos φ tan φ
Motor Common induction motor loaded at 0 % 0.17 5.80
25% 0.55 1.52
50 % 0.73 0.94
75 % 0.80 0.75
100 % 0.85 0.62
Lamps Incandescent lamps 1.0 0
Fluorescent lamps (uncompensated) 0.5 1.73
Fluorescent lamps (compensated) 0.93 0.39
Discharge lamps 0.4 to 0.6 2.29 to 1.33
Ovens Ovens using resistance elements 1.0 0
Induction heating ovens (compensated) 0.85 0.62
Dielectric type heating ovens 0.85 0.62
Welding Resistance-type soldering machines 0.8 to 0.9 0.75 to 0.48
Fixed 1-phase arc-welding set 0.5 1.73
Arc-welding motor-generating set 0.7 to 0.9 1.02 to 0.48
Arc-welding transformer-rectifier set 0.7 to 0.8 1.02 to 0.75
Arc furnace 0.8 0.75

Fig. L6Values of cos φ and tan φ for commonly-used equipment