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AbyssUnderground
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Joined: 31 Dec 2004
Posts: 3855
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 Posted: Sat Oct 22, 2005 10:04 pm Post subject: Watts and VoltAmps Converter |
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Hello everyone,
I just made this simple script for those people who may need to convert watts to voltamps (or vice versa) to help them decide on a UPS to buy. This could also be useful for my other script (running costs).
http://www.abyssunderground.co.uk/calculator-watts_voltamps.php
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Andy (AbyssUnderground) (previously The Inquisitor)
www.abyssunderground.co.uk |
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MonkeyNation
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Joined: 05 Feb 2005
Posts: 921
Location: Cardiff
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| Posted: Sat Oct 22, 2005 11:44 pm Post subject: |
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VoltAmps? Volts = Amps or something?
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Anonymoose
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Joined: 09 Sep 2003
Posts: 2192
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| Posted: Sun Oct 23, 2005 12:08 am Post subject: |
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Volts x amps = voltamps (watts) Highly technical, but I'm not entirely sure what the calculator is calculating...?
The correct calculation for watts is actually volts x amps x power factor = watts, so maybe it has a hardcoded power factor. Power factor is a measure of efficiency - cheap and cheerful power supplies have terrible efficiency compared to 'pro' ones, sucking more power under load to meet the PC's requirements.
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AbyssUnderground
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Joined: 31 Dec 2004
Posts: 3855
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| Posted: Sun Oct 23, 2005 12:16 am Post subject: |
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Basically there are the two types of power output. Watts you already know about but VoltAmps is generally used for UPS systems (why I dont know). This calculator simply converts the watts you input into VoltAmps to give you a rough idea as to the UPS to buy.
For example if you know your system takes 195w then it would be 300VA. You may not think it is useful for general use but when it comes to choosing a UPS, manufacturers dont normally state the wattage it can produce. This calculator will help you find out.
Hope that explains it a bit more clearly...
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Andy (AbyssUnderground) (previously The Inquisitor)
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