Why Raise Power Factor pf

Low (or "unsatisfactory") power factor is caused by the use of inductive (magnetic) devices and can indicate possible low system electrical operating efficiency. These devices are:

• non-power factor corrected fluorescent and high intensity discharge lighting fixture ballasts (40%-80% pf)

induction heating equipment (60%-90% pf)

lifting magnets (20%-50% pf)

small "dry-pack" transformers (30%-95% pf)

and most significantly, induction motors (55%-90% pf)

Induction motors are generally the principal cause of low power factor because there are so many in use, and they are usually not fully loaded. The correction of the condition of LOW power factor is a problem of vital economic importance in the generation, distribution and utilization of a-c power.

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