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[′vōlt ′am‚pir]
The unit of apparent power in the International System; it is equal to the apparent power in a circuit when the product of the root-mean-square value of the voltage, expressed in volts, and the root-mean-square value of the current, expressed in amperes, equals 1. Abbreviated VA.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a unit of full power of an alternating current, designated by VA. The full power of an alternating current is defined as the product of the effective values of the current in a circuit (in amperes) and the voltage at its terminals (in volts). The effective values of the current and voltage are measured by AC ammeters and voltmeters . The concept of full power is distinct from the real power of an electric circuit, which is expressed in watts and equals UI cos φ where φ is the angle of displacement of the phases between voltage U and current I, and as distinct from the reactive power, equal to UI sin φ and expressed in vars.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
In March we reported that the National Electric Code (NEC), primarily concerned with electrical safety, not energy conservation, has offered an exception in the 2014 NEC, to allow the installation of electrical infrastructure that will support only 1.5 volt-amperes per sq ft for lighting instead of the 3.5 volt-amperes per sq ft that has been the requirement for the last 50 years (volt amperes times power factor = watts).
Its rating for continuous operation is 247 Mega Volt Amperes (MVA).
According to Peter Chany Gatjiek, director of electricity in the Ministry of Physical Infrastructure, "we don't have enough fuel to operate this power station." He explained that the power station has three engines, running running on 2500 Kilo Volt Amperes (KVA), 810KVA and 2.5 Megawatts.