> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, 15 December 1999 16:59
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: Re: [SLUG] UPSs again! some questions
>
---------8-<-------------
>
> yep I remembered that bit from physics, P=V*A
> but what does "Volt-Amps" really mean? it should be
> the same as power (watts) shouldn't it?
> ok ignore that, just got the reply from DavidZ, so it
> is the same then.
>
---------8-<-------------
VA = Watts only when there is no reactive power, that is when current
(Amps) is in phase with the applied voltage (Volts).
Reactive power occurs when there is capacitive or inductive load (like a big
motor).
For this purpose (a computer UPS) it probably can be assumed to be the same,
(unless of course most of your VA is going into driving a 1/2 horse power
motor that runs the CPU refrigeration unit!!!!!).
Martin Visser
Technology Consultant - Compaq Services
Compaq Computer Australia
410 Concord Road
Rhodes, Sydney NSW 2138
Australia
Phone: +61-2-9022-5630
Mobile: +61-411-254-513
Fax:+61-2-9022-7001
Email:[EMAIL PROTECTED]
>
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