The power factor of an AC power system is defined as the ratio between real power absorbed by the load and the apparent power flowing in the circuit and is a dimensionless number in the closed interval of -1 to 1. When apparent power (measured in kVA) exceeds real power (measured in kW), the utility must supply not only the necessary working current but also the excess reactive current.

By providing the reactive current, power factor correction controllers reduce the total amount of current your system must draw from the utility. Power factor correction provides many benefits, including reduced electric utility bills, increased system capacity, improved voltage, and reduced losses.

Ways to Correct Poor Power Factor:

• • Capacitor or Capacitor Bank
  • Automatic Capacity Bank
  • Minimizing operation of idling or lightly loaded motors
  • Replace standard motors as they burn out with energy-efficient motors
  • Installing a VFD to correct the power factor