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    shockya's Avatar
    shockya Posts: 2, Reputation: 1
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    #1

    Apr 27, 2009, 10:15 AM
    3 phase load calculation
    How do I calculate the load if kw and voltage is given in a 3 phase application?
    sathe1963's Avatar
    sathe1963 Posts: 97, Reputation: 4
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    #2

    Apr 28, 2009, 09:12 AM
    Dear sir,

    you are stating that you know the kw. Then what else you want. If you want to know the current in amps use usual formula to find out one of the unknown parameter: Kw = sq.rt of 3 * voltage * current * power factor divided by 1000.

    If you require current in ampere = kw * 1000 / sq.rt.3 *voltage * pf.

    Hope, this clarifies your question. If any thing else required pl. Revert.
    shockya's Avatar
    shockya Posts: 2, Reputation: 1
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    #3

    Apr 28, 2009, 09:49 AM
    Quote Originally Posted by sathe1963 View Post
    Dear sir,

    you are stating that you know the kw. Then what else you want. If you want to know the current in amps use usual formula to find out one of the unknown parameter: Kw = sq.rt of 3 * voltage * current * power factor divided by 1000.

    If you require current in ampere = kw * 1000 / sq.rt.3 *voltage * pf.

    Hope, this clarifies your question. If any thing else required pl. Revert.
    Thank you for your time. I calculated using the same formula but did not include the power factor.
    mosesvlr's Avatar
    mosesvlr Posts: 1, Reputation: 2
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    #4

    Aug 29, 2011, 05:04 AM
    How to calculate the ups requirement for 50 desktop computers with CRT 15" monitor each and 20 Dot matric printers with 5 mid size laser printer
    sathe1963's Avatar
    sathe1963 Posts: 97, Reputation: 4
    Junior Member
    		  
    #5

    Aug 29, 2011, 07:35 AM
    This is regarding requirement of UPS capacity required for desktop, monitor & printer... Please enquire with the manufacturer / supplier about wattage or VA capacity of each appliance. Add together. If u are using 3 phase UPS distribute the load on 3 phases equally. Add 20% as a safe margin. This will be equal to your required capacity of UPS.
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