active power filter
Power factor of the most common loads
Jan 08, 2018

Please refer to following table for the power factor of the most common loads

Device Load cos φ tg φ
Ordinary asynchronous motor 0% 0.17 5.8
25% 0.55 1.52
50% 0.73 0.94
75% 0.8 0.75
100% 0.85 0.62
Incandescent lamps 1 0
Fluorescent lamps 0.5 1.73
Discharge lamps 0.4 to 0.6 2.29 to 1.33
Resistance furnaces 1 0
Induction furnaces 0.85 0.62
Dielectric heating furnaces 0.85 0.62
Resistance welding machine 0.8 to 0.9 0.75 to 0.48
Single-phase static arc-welding centres 0.5 1.73
Rotary arc-welding sets 0.7 to 0.9 1.02
Arc-welding transformers/rectifiers 0.7 to 0.9 1.02 to 0.75
Arc furnaces 0.8 0.75

Cos φ of the most commonly-used devices.

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