Industrial Training

Industrial Training Blog


A Power Factor refresher.


Definition of Power Factor:

Power factor is the phase difference between the sine wave of the voltage and current.

Power Factor is ratio of real power into apparent power.

¤ KW is Working Power (also called Actual Power or Active Power or Real Power). It is the power that actually powers the equipment and performs useful work.

¤ KVAR is Reactive Power. It is the power that magnetic equipment (transformer, motor and relay) needs to produce the magnetizing flux.

¤ KVA is Apparent Power. It is the “vectorial summation” of KVAR and KW.



The higher percentage of KVAR, The lower ratio KW to KVA = Lower power factor.

The lower percentage of KVAR, The higher ratio KW to KVA = higher power factor.


Drawbacks of low power factor:

¤ Increase electricity costs by paying penalties.

¤ Inefficient use of electrical energy.

¤ Overloading of transformer and generator.


View original post 73 more words


June 17, 2015 - Posted by | Uncategorized

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