Causes of low power factor

What are the causes of Low Power Factor ?

 The different causes of low power factor are given below :

•  Single-phase and three-phase induction motors, which are normally used in AC circuits, where the current lags the voltage by 90`, as it is purely inductive in nature.
•  Other inductive equipment, which cause low power factors are :transformers,generators, arc lamp,electric furnaces and so on.
•  Load variation in the power system i.e., if the power system is loaded lightly, the power factor becomes low, as the current drawn by the equipment increases due to increases in voltage.
•  Existence of harmonic current reduces the power factor.
•  Imbalance in the power system due to improper wiring or electrical accident.