Power Factors for Typical Industrial Loads

Typical Industrial Loads and
Their Common Power Factors
   

Load

Typical Power Factor

Incandescent Lamps

1.0

Fluorescent Lamps

0.95 - 0.97

Synchronous Motors

1.0 - 0.80 leading

Squirrel Cage Motors  
     High Speed

0.75 - 0.90

     Low Speed

0.85 - 0.92 

     Wound Rotor

0.80 - 0.90

Induction Motors  
     Fractional HP

0.55 - 0.75

     1 - 10 HP

0.75 - 0.85

Arc Furnace

0.65 - 0.70

Induction Furnaces

0.90 - 1.0*

Power Converter (SCR Type)

0.50 - 0.90

*Capacitors usually included with the Induction Furnace