# Power Factor

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Related to power factors: Apparent power

## power factor

[′pau̇·ər ‚fak·tər]
(electricity)
The ratio of the average (or active) power to the apparent power (root-mean-square voltage times rms current) of an alternating-current circuit. Abbreviated pf. Also known as phase factor.

## Power Factor

(cos ɸ), the ratio of the average power of alternating current to the product of the effective values of voltage and current. The maximum value of the power factor is 1. For a sinusoidal alternating current, the power factor is equal to the angle of the phase shift between the sine curves of voltage and current and is determined by the circuit parameters: cos ɸ = r/Z, where ɸ is the phase shift angle, r is the effective resistance of the circuit, and Z is the total impedance. The power factor may have a value different from 1 even in circuits containing only resistances, if the circuits contain any nonlinear sections. In this case the power factor is decreased because of the distorted shape of voltage and current curves.

## power factor

In an alternating current, the ratio of the average power (expressed in watts) to the apparent power (expressed in volt-amperes).
References in periodicals archive ?
Power Factors delivers data platforms for clean energy, providing infrastructure and services to optimise the physical and financial performance of clean energy assets.
Power Factors co-founders Steve Scales and Steve Hanawalt will join the Solarrus helm team and will have vital roles in continuing Solarrus noteworthy development.
Many, but not all, "non-linear" lighting loads such as those resulting from the installation of certain common electronic lighting ballasts (typically electronic fluorescent lamp ballasts for straight-linear--or U-shaped T8 and T5 lamps), often exhibit some varying combination of both types of displacement and distortion power factors, simultaneously.
Low power factors negatively impact the environment because transmission lines lose more power in the form of heat proportional to the square of the current.
3DFS[TM] estimates that "the typical home operates at a power factor worse than 0.
Various power factors were modeled, from 60% to 90%.
Low-energy light bulbs have a capacitative component, and I suspect that the energy monitor is not making an appropriate power factor correction.
Don't touch that oscilloscope if you plan to measure power factor.
has introduced a single-chip fluorescent lamp ballast device with an active, critical conduction mode, boost-type power factor correction (PFC) method.
However, it is significant to note that IPSC conducted no actual tests of currently available self-defense ammunition before arriving at the new power factors.
Because SCR chargers have an inherently lower power factor (approximately .

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