Derating curve for a transformer

Discussion in 'General Electronics Chat' started by seemurugan, Jun 2, 2015.

  1. seemurugan

    Thread Starter New Member

    Mar 25, 2009
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    Dear all, Any one can explain me how to plot derating curve for a 25VA transformer @ ambient 60° Temperature.

    Pls advice
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,009
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    You need to know the specified maximum operating temperature rating of the transformer to calculate the derating for higher temperatures.
    Since transformer heating is primarily due to I^2R losses in the winding resistance you would derate the current (VA) on a square-law basis.
     
    seemurugan likes this.
  3. ronv

    AAC Fanatic!

    Nov 12, 2008
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