apparent volt-amperes

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• Volt-amperes reactive — In alternating current power transmission and distribution, volt ampere reactive power (VAr) is a unit used to measure reactive power in an AC electric power system. 1 VAr = 1 V·A. [http://www.iec.ch/zone/si/si elecmag.htm SI units – Electricity… …   Wikipedia

• Volt-ampere — A volt ampere (VA) is the unit used for the apparent power in an electrical circuit, equal to the product of root mean square (RMS) voltage and RMS current.[1] In direct current (DC) circuits, this product is equal to the real power (active… …   Wikipedia

• Apparent power —   The product of the voltage (in volts) and the current (in amperes). It comprises both active and reactive power. It is measured in volt amperes and often expressed in kilovolt amperes (kVA) or megavolt amperes (MVA). See Power, Reactive Power,… …   Energy terms

• Wattmeter — The wattmeter is an instrument for measuring the electric power (or the supply rate of electrical energy) in watts of any given circuit. Electrodynamic The traditional analog wattmeter is an electrodynamic instrument. The device consists of a… …   Wikipedia

• Power factor —   The ratio of real power (kilowatt) to apparent power kilovolt ampere for any given load and time.   U.S. Dept. of Energy, Energy Information Administration s Energy Glossary   ***   The ratio of the average power and the apparent volt amperes.… …   Energy terms

• Power factor — For other uses, see Power factor (pistol). The power factor of an AC electric power system is defined as the ratio of the real power flowing to the load over the apparent power in the circuit,[1][2] and is a dimensionless number between 0 and 1… …   Wikipedia

• AC power — This article deals with power in AC systems. See Mains electricity for information on utility supplied AC power. Usually hidden from the unaided eye, the blinking of (non incandescent) lighting powered by AC mains is revealed in this motion… …   Wikipedia

• Kilovolt-Ampere — (kVa)   The practical unit of apparent power, which is 1,000 volt amperes. The volt amperes of an electric circuit are the mathematical products of the volts and amperes of the client.   ***   A unit of apparent power, equal to 1,000 volt… …   Energy terms

• kilovolt-ampere — noun a unit of electrical power equal to 1000 volt amperes • Hypernyms: ↑power unit • Part Meronyms: ↑volt ampere, ↑var * * * ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ˈ ̷ ̷ˌ ̷ ̷ noun : a unit of apparent power in an electric circuit equal to 1000 volt amperes * * * /kil… …   Useful english dictionary

• Capacitor — This article is about the electronic component. For the physical phenomenon, see capacitance. For an overview of various kinds of capacitors, see types of capacitor. Capacitor Modern capacitors, by a cm ruler Type Passive …   Wikipedia

• power factor — noun : the ratio of the mean actual power in an alternating current circuit measured in watts to the apparent power measured in volt amperes, being equal to the cosine of the phase difference between electromotive force and current …   Useful english dictionary