Thyristor failure mode

Thread Starter

cafergav

Joined May 9, 2013
2
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
 

JDT

Joined Feb 12, 2009
657
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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