AC Power

AC Power

Power in an electric circuit is the rate of flow of energy past a given point of the circuit. In alternating current circuits, energy storage elements such as inductance and capacitance may result in periodic reversals of the direction of energy flow. The portion of power that, averaged over a complete cycle of the AC waveform, results in net transfer of energy in one direction is known as real power. The portion of power due to stored energy, which returns to the source in each cycle, is known as reactive power.

Read more about AC Power:  Real, Reactive, and Apparent Powers, Power Factor, Reactive Power, Reactive Power Control, Unbalanced Polyphase Systems, Basic Calculations Using Real Numbers, Multiple Frequency Systems

Other articles related to "power, ac power, ac":

Electric Power System - Basics of Electric Power
... Electric power is the mathematical product of two quantities current and voltage ... These two quantities can vary with respect to time (AC power) or can be kept at constant levels (DC power) ... refrigerators, air conditioners, pumps and industrial machinery use AC power whereas most computers and digital equipment use DC power (the digital devices you plug into the mains typically have an ...
Fire Alarm Control Panel - Panel Alerting - AC Power
... When this indicator is lit, power is being provided to the system from the building's electrical system, and not from the backup battery ... When an AC power condition changes, the Trouble indicator comes on and the AC power indicator goes off and the screen alerts building personnel of a ... If the AC power indicator is lit without any other indicators also lit, then the system is in a normal condition ...
AC Power Plugs And Sockets
... AC power plugs and sockets are devices that allow electrically operated devices to be connected to the primary alternating current (AC) power supply in a building ... A socket is also called a receptacle, outlet, or power point (British English) ...
AC Power - Multiple Frequency Systems
... Since an RMS value can be calculated for any waveform, apparent power can be calculated from this ... For real power it would at first appear that we would have to calculate loads of product terms and average all of them ... In other words it is possible to calculate real (average) power by simply treating each frequency separately and adding up the answers ...
Platform Controller Hub - Ibex Peak - Issues
... This can happen when AC power is removed after entering ACPI S4 ... Adding AC power back and resuming from S4 may result in non detected or even non functioning USB device (erratum 12) Bogus USB ports will be detected at mobile PCH equipped with 6 USB ports (HM55) on the ... This can happen when AC power and battery are removed after entering ACPI S4 ...

Famous quotes containing the word power:

    A physician can sometimes parry the scythe of death, but has no power over the sand in the hourglass.
    Hester Lynch Piozzi (1741–1821)