ⓘ Electric power ..

Electric power

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries. It is usually supplied to businesses and homes as domestic mains electricity by the electric power industry through an electric power grid. Electric power can be delivered over long distances by transmission lines and used for applications such as motion, light or heat with high efficiency.

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 inductors and capacitors 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 active power more commonly called real power to avoid ambiguity especially in discussions of loads with non-sinusoidal currents. The portion of power due to stored energy, which returns to the source in ea ...

Advanced Configuration and Power Interface

In a computer, the Advanced Configuration and Power Interface provides an open standard that operating systems can use to discover and configure computer hardware components, to perform power management by putting unused components to sleep, and to perform status monitoring. First released in December 1996, ACPI aims to replace Advanced Power Management, the MultiProcessor Specification, and the Plug and Play BIOS Specification. ACPI brings the power management under the control of the operating system, as opposed to the previous BIOS-centric system that relied on platform-specific firmwar ...

AEP meter label format

The California Direct Access Standards setting process in 1997 identified the need to standardize the electric meter label identifier so as to create a unique identifier for every electric meter in the United States. The AEP meter label format is a recommended solution for this need.


AlertMe was a UK smart Tech company that provides energy and home monitoring hardware and services. AlertMe produces hardware and software to enable users to monitor and control their home energy use. In 2015 the company was acquired by British Gas Trading Limited for £65 million. In April 2016 the limited company was renamed to Centrica Connected Home Limited. AlertMe uses Non Intrusive Load Monitoring to extrapolate trends from customer data, which is then used to make energy saving recommendations.

Alternating current

Alternating current is an electric current which periodically reverses direction, in contrast to direct current which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket. A common source of DC power is a battery cell in a flashlight. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage. The ...

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