Question about transformer

Discussion in 'The Projects Forum' started by TAKYMOUNIR, Aug 12, 2011.

  1. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
    351
    1
    I have transformer have 5 % iz what this mean and what is its affect second i have one transformer 3 phase it does not have any information how can i calculate kva for it
    thanks
     
  2. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
    2,831
    89
    power = voltage x current
    voltage output or input, same with current
     
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  3. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    percent impedance is basically your internal impedance, and is an indicator of the current available during short circuit. This information is relevant when you are selecting appropriate fusing for the trans, as well as sizing it for such things as motor loads. When an attached motor starts, it's relatively heavy current draw will cause a voltage drop in relation to the trans' impedance. This is a very important consideration when supplying motor loads.

    Without manufacturer's data, you really can not 'calculate' the KVA. One could determine it's capacity through a number of tests. Although it's physical size is a good indicator
     
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  4. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    this will not work, care to try again, just for the exercise? Or more specifically for RRITESH, how would you calculate Kva of a 3 phase transformer?
     
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