Thyristor failure mode

Discussion in 'General Electronics Chat' started by cafergav, May 9, 2013.

  1. cafergav

    Thread Starter New Member

    May 9, 2013
    2
    0
    I need to determined when a Thyristor has been damage by an Overvoltage or by an Overcurrent. Several of our Thyristor SKKT 273 / 18E has burned also the pulse card. Any other element result damage.

    Would appreciate any comments
     
  2. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Unless we get an idea of the application it was being used for and a schematic, it is going to be a guess.

    Ramesh
     
  3. JDT

    Well-Known Member

    Feb 12, 2009
    658
    85
    Might not be the thyristor. The gate is normally driven with a pulse transformer to isolate the high-voltage thyristor from the low-voltage pulse electronics. These insulation between the windings on these transformers can fail. This allows high-voltage to get to the driver electronics causing damage.

    Hope this helps.
     
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