What is Power Factor in Bangla || Power Factor Basic ||Power Factor Explained ||Electrical Circuit

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Power factor is the measure of how effectively the incoming power is used in an electrical system. A high power factor indicates that the power supplied to the electrical system is effectively used. A system with low power factor doesn’t effectively consume the incoming electric supply and results in losses. There is no power factor involved in DC circuits due to zero frequency. But, in AC circuits, the value of power factor always lies between 0 and 1.

Explaining Power Factor
Power factor is defined as the cosine of the angle between voltage and current. Ideally, in AC circuits, the phase difference between voltage and current is zero. But, practically there exists some phase difference between the two. The cosine of the phase difference between the two is defined as the power factor.

Power Factor = cosɸ

In the figure of the power triangle,

VI sinɸ = Reactive power (in VAR)

VI cosɸ = Active power (in Watts)

VI = Apparent power (in VA)

PF = cosɸ = Active Power (W) / Apparent Power (VA)

Knowledge Review

Real Power – The power supplied to the equipment that performs useful and productive work.

Reactive Power – The power required by equipment such as transformers and motors to produce magnetic fields enabling actual work to be done.

Apparent Power – The vector sum of real power and reactive power

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