With an AC supply line and in the presence of inductive circuits, the reactive power is the power that is absorbed and retransmitted to the line without being used by the load. The lower the power factor, the greater is the reactive power generated. In many European countries, there are additional costs for the reactive component.
Acronym for Power Factor Correction. Indicates a function or a device whose objective is to "correct" a no-efficient absorption of alternating current by an electronic circuit in order to avoid a power factor (PF) much less than 1 implies that the increase of the losses of electricity transmission and network disturbances.