All about Power factor from Definition to Significance

All about Power factor from Definition to Significance
What is power factor and why is it important?

Power factor is an expression of energy efficiency. It is usually expressed as a percentage—and the lower the percentage, the less efficient power usage is.

Power factor (PF) is the ratio of working power, measured in kilowatts (kW), to apparent power, measured in kilovolt amperes (kVA). Apparent power, also known as demand, is the measure of the amount of power used to run machinery and equipment during a certain period. It is found by multiplying (kVA = V x A). The result is expressed as kVA units.

PF expresses the ratio of true power used in a circuit to the apparent power delivered to the circuit. A 96% power factor demonstrates more efficiency than a 75% power factor. PF below 95% is considered inefficient in many regions.
How to calculate power factor
To calculate power factor, you need a power quality analyzer or power analyzer that measures both working power (kW) and apparent power (kVA), and to calculate the ratio of kW/kVA.

The power factor formula can be expressed in other ways:

PF = (True power)/(Apparent power)

OR

PF = W/VA

Where watts measure useful power while VA measures supplied power. The ratio of the two is essentially useful power to supplied power.

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Ravi Tiwari
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