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How to Convert Amplifier VA (Volt-Amps) Rating to Watts (W) with Example?

zdzichu6969 26006 6
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  • #1 5297243
    zdzichu6969
    Level 23  
    Hello, I have the abbreviation VA on the amplifier, what does it mean and can it be somehow converted to watts. If so, please give me an example, thank you.
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    #2 5297275
    yokoon
    Level 29  
    It is an abbreviation of Volta and Ampera, which is abbreviated as V * A = power in volt-amperes.
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  • #3 5297306
    zdzichu6969
    Level 23  
    I have 190VA on the amplifier, that is
    V-220 [formerly]
    AND-?
    VA-190
    - 190[va]/220[v]~0.86
    - 220*0.86 = 189.2 or ~ 190VA
    ____

    W=U*I*t
    W=220V*0.86A*1s=189.2 Watts? [this is the energy formula and the unit is W•s]
    My proposal then:
    VA=W
    Please correct me if I am thinking wrong.
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    #4 5297343
    vertim
    Level 23  
    P=UI
    VA=W
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    #5 5297350
    ArturAVS
    Moderator  
    Hello

    Less, more is fine. The volt-ampere is not exactly a watt. On average, for small power (tens, hundreds of W) it can be assumed that it is the same. Not with higher powers.


    Regards
    Arturavs
  • #7 5297412
    zdzichu6969
    Level 23  
    The moderator you corrected will follow your comments. I'll try not to write words like "boost" etc.
    I wish you health - for the moderator.

    Thanks everyone for the help everyone got helped .

    closing.
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Topic summary

The abbreviation VA stands for volt-amperes, which is a unit of apparent power in electrical systems. It can be converted to watts (W) under certain conditions, particularly when the power factor is considered. For example, an amplifier rated at 190VA with a voltage of 220V can be calculated as follows: using the formula W = U * I, where U is voltage and I is current, the current can be derived from the VA rating. In this case, 190VA / 220V gives approximately 0.86A, leading to a power calculation of 220V * 0.86A = 189.2W. However, it is noted that VA is not exactly equivalent to watts, especially at higher power levels, where the power factor plays a significant role.
Summary generated by the language model.
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