Apparent Power

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apparent power

[ə′pa·rənt ′pau̇·ər]
The product of the root-mean-square voltage and the root-mean-square current delivered in an alternating-current circuit, no account being taken of the phase difference between voltage and current.

Apparent Power


a quantity that is equal to the product of the effective values of the periodic electric current I in a circuit and of the voltage U across the terminals of the circuit: S = UI. For a sinusoidal current (in complex form), = U̇İ, where is the complex effective value of the voltage and İ is the conjugate of the complex effective value of the current. S͂ = P + jQ, where P is the active power and Q is the reactive power; for inductive loads, Q > 0, and for capacitive loads, Q< 0. Apparent power is measured in volt-amperes.

References in periodicals archive ?
The apparent power method is more accurate in cases when the power factor is very near to 1.
For example, the crankcase heater of the minisplit-compressor draws up to 200 VA apparent power even when not providing space heating or cooling.
It was good that our leaders finally agreed to take part in live TV debates - but what was worrying was the apparent power of television in persuading so many people to immediately decide to change their voting intentions.
The power factor is the ratio of real power (watts) to apparent power (volts x amps) and can be thought of as the degree of nonlinearity between the lamp current and lamp voltage.
But that apparent power has, again and again, proved vulnerable in history to human qualities less measurable than entrenched political power such as moral fervor, determination, unity, organization, sacrifice, wit, ingenuity, courage, and persistence.
Devices that have the apparent power equal to the real power, thus voltage and current are in the phase, belong to the first one.
TOKYO, Oct 22 (KUNA) -- South Korea and the US said Thursday they are looking at "all possible scenarios" that may arise in North Korea which continues to increase its nuclear and missile capabilities while engineering an apparent power succession, local media reported.
It noted "a readily apparent power struggle that is ongoing between a group of faculty, staff and mid-level administrators, and the board and president and other members of the college faculty and staff.
The power factor (the ratio of the average [or active] power to the apparent power of an alternating-current circuit) can directly relate to the cost of electric energy to turn the rotors to mix rubber.
The Supreme Soviet would be given greater apparent power and the president and deputies greater apparent independence.
Each time you sit through it, it will lose some of its apparent power.
We also called for the apparent power vacuum at boardroom level to be filled without delay.