[GTALUG] computer hardware testing tools.

[Don Tai]

Your explanation is better and more thorough.

On Wed, 12 Jul 2023 at 13:35, Scott Allen <mlxxxp at gmail.com> wrote:

> On Wed, 12 Jul 2023 at 12:37, Karen Lewellen via talk <talk at gtalug.org>
> wrote:
> > How expensive are UPS units, and how do they work?
>
> I was typing this when Don Tai replied but I'll post it just in case
> anything additional I've said is helpful:
>
> UPS stands for Uninterruptible Power Supply, sometimes also called a
> "battery backup" unit. It's a piece of equipment that contains a
> rechargeable battery, connects to your building's AC power (usually by
> just plugging it into a standard AC outlet) and has AC receptacles on
> it that you plug your equipment into instead of plugging them directly
> into the wall. You could think of it as a big power bar with a battery
> in it.
>
> The battery is kept continually charged by a built-in battery charger
> while it's plugged in. If the power fails, an DC to AC converter
> (called an inverter) switches to the outlets and continues to provide
> AC power to your equipment. When mains power is restored, the battery
> is switched out and the AC is switched in and the battery is again
> charged. Thus, it provides "uninterruptible" AC power to your
> equipment. Like power bars, most UPSs also provide surge protection
> and sometimes also other line conditioning.
>
> The cost and size of the UPS you require will depend on how much power
> the equipment you want to keep running draws and how long you have to
> keep it running. For your requirements, the size could vary from about
> 12 inches square to the size of a large suitcase. Cost could be from
> maybe $75 to many hundreds.
>
> --
> Scott
>
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