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Definition of "Power Factor" |
The ratio of the average power and the apparent volt-amperes. / The ratio of the actual power of an alternating or pulsating current, as measured by a wattmeter, to the apparent power, as indicated by ammeter and voltmeter readings. The power factor of an inductor, capacitor, or insulator is an expression of their losses. In AC power transmission and distribution, the cosine of the phase angle between the voltage and current. / Ratio of the active power consumed by a component or circuit to the apparent power. For purely sinusoidal waveforms, this is also equal to the cosine of the phase angle between the voltage and the current. / The power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load, to the apparent power in the circuit, and is a dimensionless number between -1 and 1. Real power is the capacity of the circuit for performing work in a particular time. / A quantity that relates the volt amperes of an AC circuit to the wattage (power = volt-amperes x power factor). Power factor also is the ratio of the circuit resistance (R) to the impedance (Z) expressed as a decimal between zero and one (pf = R/Z). When the power factor equals one, all consumed power produces useful work. / Global System for Mobile Communications, originally Groupe Spécial Mobile, is a standard developed by the European telecommunication Standards Institute to describe protocols for second generation digital cellular networks used by mobile phones. / (1) in an AC system, the ratio of the (active component) real power P to the apparent power S; it is given by the cosine of the angle subtended by S on the real, P axis. |
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