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volt alternating current

См. также в других словарях:

  • Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …   Wikipedia

  • Alternating Current — Wechselstrom bezeichnet elektrischen Strom, der seine Richtung (Polung) in regelmäßiger Wiederholung ändert und bei dem sich positive und negative Augenblickswerte so ergänzen, dass der Strom im zeitlichen Mittel null ist. Abzugrenzen ist der… …   Deutsch Wikipedia

  • Volt ampere — Volt amp[ e]re (Elec.) A unit of electric measurement equal to the product of a volt and an ampere. For direct current it is a measure of power and is the same as a watt; for alternating current it is a measure of apparent power. [Webster 1913… …   The Collaborative International Dictionary of English

  • volt-ampere — volt′ am′pere n. elm an electric measurement unit, equal to the product of one volt and one ampere, equivalent to one watt for direct current systems and a unit of apparent power for alternating current systems Abbr.: VA • Etymology: 1895–1900 …   From formal English to slang

  • 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

  • volt ampere — (V·A)    a unit of electrical load used in power engineering. In an alternating current circuit, if the potential (measured in volts) and the current (measured in amperes) vary in phase with each other, then the power delivered (measured in… …   Dictionary of units of measurement

  • volt-ampere — /vohlt am pear, am pear /, n. Elect. an electric measurement unit, equal to the product of one volt and one ampere, equivalent to one watt for direct current systems and a unit of apparent power for alternating current systems. Abbr.: VA [1895… …   Universalium

  • Residual-current device — A two pole residual current device A Residual Current Device is a generic term covering both RCCBs and RCBOs. A Residual Current Circuit Breaker (RCCB) is an electrical wiring device that disconnects a circuit whenever it detects that the… …   Wikipedia

  • List of current systems for electric rail traction — This a list of the power supply systems that are, or have been, used for tramway and railway electrification systems. Note that the voltages are nominal and vary depending on load and distance from the substation. Many modern trams and trains use …   Wikipedia

  • reactive volt-amperes — noun plural : the product of the effective voltage and effective current in an alternating current circuit and the sine of the angular phase difference between them …   Useful english dictionary

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