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

    Well-Known Member

    May 3, 2013
    721
    124
    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
    87
    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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