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Definition of "Volt Ampere" |
A unit of apparent power equal to the mathematical product of a circuit voltage and amperes. Here, apparent power is in contrast to real power. On ac systems the voltage and current will not be in phase if reactive power is being transmitted. Usually abbreviated VA. / A volt ampere is the voltage times the current feeding an electrical load. A kilo-volt ampere (KVA) is 1000 volt amperes. Electrical power is measured in watts (W) The voltage times the current measured each instant. In a direct current system or for resistive loads, the wattage and VA measurements will be identical. But for reactive loads, the voltage and current are out of phase and the volt ampere spec will be greater than the wattage. |
Definition of "volt-ampere" |
A volt-ampere (VA) is the voltage times the current feeding an electrical load. A kilovolt-ampere (kVA) is 1000 volt-amperes. Electrical power is measured in watts (W): The voltage times the current measured each instant. In a direct current system or for resistive loads, the wattage and VA measurements will be identical. But for reactive loads, the voltage and current are out of phase and the volt-ampere spec will be greater than the wattage. For determining power, watts are appropriate. For determining capacity for the driving circuits (circuit breakers, wiring, and uninterruptible power supplies, for instance), VA is appropriate. / unit of apparent power in an AC circuit containing capacitive or inductive reactance. Apparent power is the product of source voltage and current. |
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