In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.

A typical power factor panel consists of :

  1. Power factor relay,
  2. Power capacitors,
  3. Contactors.

Power factor relay – is calculating by the measuring of current and voltage the power conditions in the electrical network . It controls the whole switching process.

Capacitors – 3 phase capacitors.

Contactors – special contactors for capacitor switching. Contactors fitted with a block of early make poles and damping resistors, limiting the value of the current on closing to 60 In max. This current limitation increases the life of all the components of the installation, in particular that of the fuses and capacitors.

In the videos below you will find full information how to wire power factor correction panel.

Simple power factor correction.
Power factor correction with stage indicators and manual-auto switches.