Inductive loads, tend to absorb heavy inrush currents and reduce power factor, adding large penalty factors.Automatic power factor correction (APFC) monitors load to automatically initiate suitable capacitance, providing clean ideal power with unity power factor. APFC Panel has a micro controller-based programmable controller whichs witches the capacitor banks of suitable capacity automatically in multiple stages by directly reading the reactive load (RKVA) which works in the principle of VAR sensing tends to maintain the PF to 0.99 Lag.
The capacitor banks may be selected in the number of stages as 4/6/8 according to the load pattern. Modern power networks consist of a wide variety of electrical and power electronics loads, in case of such varying loads, the power factor also varies as a function of the load requirements. So it is practically difficult to maintain consistent power factor by the use of fixed compensation i.e. fixed capacitors which shall need to be manually switched to suit the variations of the load. It can lead to situations where the installation can have a low power factor leading to high erdemand charges and levy of power factor penalties. In addition to not beingable to achieve the desired power factor, it is also possible that the use offixed compensation can also result in a leading power factor under certain load conditions.