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IT comms room question

  • 14-02-2024 2:46pm
    #1
    djr
    Registered Users, Registered Users 2 Posts: 231 ✭✭


    Hi All,

    I work in a software company in Dublin city, we have an in-house comms room with quite old equipment and wiring that I am trying to figue out the power consumption of. We had a sparks in today doing a few other bits, and I asked him to measure the usage of the room. He pulled out his meter, and measured the following:

    L1 10.6a

    L2 11.16a

    L3 11.8a

    I'm trying to run those numbers through some kW calculators online, and coming up with approx 4.4kW. I should just be using an average of the the 3 phases for the calculation, correct? Also, Is 3-phase power in Ireland 230/240 or 400V, or does it depend on the installation?

    The room contains 30+ servers, and networking + ISP equipment, just for context.



Comments

  • #2
    tomhammer..
    Registered Users, Registered Users 2 Posts: 1,304 ✭✭✭tomhammer..


    3P supply voltage is 230/400 nominally

    230 is phase voltage and 400 is line voltage

    Used to be 220/380



  • #3
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,071 ✭✭✭10-10-20


    Hi! It would be roughly 235v to 240v from neutral to each phase (N to L1), but 400v if you were to measure from phase to phase (L1 to L2).

    L1 10.6a = 2.54kW

    L2 11.16a = 2.7kW

    L3 11.8a = 2.8kW

    Total all of them, don't average - not sure where you got that.

    Next time ask him to install a 3phase energy panel meter such as this one :

    https://ie.rs-online.com/web/p/energy-meters/2369299

    That's what we use in our IT lab for continuous monitoring. We have another on the cooling so that we can see that separately.



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