power-factor

Power Factor (pF) – What is It?

The pF is usually defined as the ratio of the real power flowing to the load to the apparent power in an AC electrical circuit, or you could say that pF is the cosine of the phase angle between current and source voltage.

To put that a little simpler: pF represents the fraction of total power (apparent power) which is utilised to do the useful work called active power. It provides a measure of how efficiently a load current is being converted into useful work output. Essentially, this is an indication of the overall efficiency of a supply system.

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