How adverse effects of unintended resonance impact the use of capacitors and harmonic filters
According to the IEEE Standard Dictionary of Electrical and Electronic Terms, power factor (PF) is defined as the ratio of the circuit power (watts) to the circuit volt-amperes. This is described by the equation PF = W VA. Put another way, PF is the ratio of useful power to perform real work (commonly termed active power) to the power supplied by an electric utility (commonly termed apparent power).
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