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Author Topic: Uninterruptible power supply - UPS  (Read 64 times)
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keefy
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« on: July 25, 2010, 03:28:01 AM »

Thinking of getting one now after having a couple of powercuts the most recent was yesterday when a waterpipe burst and the workers had to turn the leccy off albeit for maybe an hour max but still had to leg it up to PC to switch off before it was too late.

So anybody got experience of such devices?
What do I need to look for?
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Electric Warrior
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« Reply #1 on: July 25, 2010, 10:30:18 AM »

Thinking of getting one now after having a couple of powercuts the most recent was yesterday when a waterpipe burst and the workers had to turn the leccy off albeit for maybe an hour max but still had to leg it up to PC to switch off before it was too late.

So anybody got experience of such devices?
What do I need to look for?

Both David and I use UPS devices for the very same reason, power cuts, something that may become more prevalent in the next few years when all the power workers start striking over government cuts, although the fear of strikes was not our reason for using them.  The first one I ever had was given to me, and it saved my data on several occasions, and I now consider it an important piece of equipment.

Both models we have are made by APC by Schneider Electric, who are one of the most prolific UPS manufacturers.   There are others by people such as Belkin, but they do seem to be a bit cheap and cheerful.   You need to make sure the model you get will give you enough time to save all of your data before shutting down your PC, and depending on your PSU and whatever peripherals you have attached to your PC, such numbers of HDD, DVD Roms, Monitors.   You don't get very long even with some of the bigger models, maybe about 12 minutes average, and to get any longer you'd have to pay big money.

The model we have are Back Up RS 800, which gives my PC (a quad core which has a lot of extra peripherals) just over 7 minutes of power after a power cut.  Just enough to shut every thing down safely.  It acts as a surge and lightning protector, and also protects the power to my handheld home phones.
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[AgC] AngryDragon
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« Reply #2 on: July 25, 2010, 10:33:34 AM »

The total wattage it can deliver.
if you then have the amount of power you use and divide the total wattage by this calculated number you have the amount of time (minutes) your system can run.

first of all you have to check "what" you  want to have on this UPS.
- PC only?
- PC + monitor?
- PC, monitor, modem etc etc.

basically there are 3 forms of UPS
1. simple, powerblock with 4 to 8 connection with inbuild battery.
these are the easiest. just like a normal power block, only slighty heavier.
mostly they can serve up to 8 minutes on full usage.
all hardware is connected with their normal powerconnectors.
Example: APC Back-UPS ES 700VA

2. standalone UPS
these are the heavier boxes, 450 to 1500watt, 4 - 8 connections.
the better models also have a usb connection to install software on a pc/server and that software will shutdown the pc/server nicely when powerconnection is gone to long and accu's allmost empty.
all pheripicals are connected through euro - contra-male - male connectors (yes, you need new powercables)
example: APC Smart-UPS SUA1500I

3. 19" version of above.
will not discuss this as they are basically the same as the standalone's, but ment for a rack, and cost way more.

there are a few brands, but i have have learnt my lesson and will NEVER use Trust or Sweex anymore.
for me the only brand is APC.


i use both examples from above in my house.
the 700VA near my telephone outlet, and my telephone, modem, 1'st router and a light are on it.
(the light to have some light when all falls out, the telephone and modem and 1'st router are obvious i think). it can run up to 2 hours without power when i dont use the light.

the bigger 1500 is used for my primary PC, 1 monitor and 2 small servers (without monitors) and a main router.
so when something happens the servers will continue, and 1 have a pc with monitor to connect to these servers.

i never put any printer on a UPS cause a laserprinter will take up to 1000watt when starting to print.
it would empty my UPS.

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Haplo
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« Reply #3 on: July 25, 2010, 06:44:46 PM »


Totally agree with Angry...



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keefy
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« Reply #4 on: July 25, 2010, 07:14:07 PM »

Thanks for the info looks like the APC Back-UPS ES 700VA is my best option.
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Muz
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« Reply #5 on: August 16, 2010, 10:25:30 PM »

I always wondered how they'd got their name .. I cant fault the geezas .. they deliver on time everytime I think theyz fookin brill!
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