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UPS choice?

  • 31-05-2007 5:55am
    #1
    the_new_mr
    Registered Users, Registered Users 2 Posts: 842 ✭✭✭


    Hey all!

    Was wondering if some of you dudes could help me out.

    We've got some bad power problems over here. On hot days, the voltage often drops a good bit due to people using air conditioners in our building. Whenever the voltage drops anywhere below 185 volts (checked with a multi-meter... DON'T DO THIS UNLESS YOU KNOW WHAT YOU'RE DOING!!!), our restarts. If it's just a blip and the voltage goes back up again straight away then it's just a restart. But if the voltage stays below 185 volts, the computer keeps restarting.

    So, solution? A UPS methinks. Did a bit of reading on them on wikipedia and elsewhere and learned that there are two types: on-line and off-line.

    Saw a few in the shops there yesterday. Some of them were "in"-line. Is that the same as on-line? (I'm guessing no as I just checked this site and they have in-line and on-line as two product categories).

    One of them said that it can supply power within 4 milliseconds typical (10 ms max) but I imagine that's way too long as far as the computer is concerned or am I mistaken?

    Also, what kind of power should I be going for?

    Will something like this do the job?

    Thanks in advance!


Comments

  • #2
    the_new_mr
    Registered Users, Registered Users 2 Posts: 842 ✭✭✭the_new_mr


    Forgot to mention...

    The voltage at our place rarely (if ever) goes up to the normal 220 V. Does this mean the computer will feed off the UPS' battery all the time?

    Thanks again.


  • #3
    zilog_jones
    Registered Users, Registered Users 2 Posts: 6,638 ✭✭✭zilog_jones


    Maybe you should get an electrician around? Sounds pretty dodgy that the voltage is going that low.

    When I used to live in Saudi where the mains wasn't the most reliable thing around (plus it was 127V unlike everywhere else in the world), we used a "voltage stabiliser" - it was a box about the same size as a small UPS, seemed to have a big coil of some sort inside it, and it had a voltmeter on the front. It also functioned as a step-down/up transformer (it had 2x 110V and 220V outputs and the input could be 110 or 220V). It was made by some random Taiwanese company IIRC. Since you're not actually losing power, maybe this kind of thing would be suitable?


  • #4
    the_new_mr
    Registered Users, Registered Users 2 Posts: 842 ✭✭✭the_new_mr


    I think you're right. We're over here in Egypt and the electrical company is, to put it mildly, somewhat incompetent. Had another look at the UPS spec sheet and it seems that it needs input of between 175 and 285 V. The voltage here sometimes drops to as low as 165 Volts so might not to do the job for the really low voltages.

    Gonna look into a voltage regulator and see what the story is. I'll let you know how I get on.


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