Announcement

Collapse
No announcement yet.

Another SCR Question

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Another SCR Question

    Me again. Hope you guys can help. I'm going to try the ever so popular/unpopular SCR foot control project to vary the voltage of a buzz box transformer.

    The SCR's required/listed for the project are 50 amp 1000 volt.

    Can I substitute higher values such as a 90 amp SCR which I have readily available?

    I have substituted higher values of componants in other projects with no problem but wasn't sure about SCR's.

    I'm not concerned at this point about triggering issues. That will be another post down the road. Thanks in advance. Uncrichie.

  • #2
    I don't see a problem with using 90 amp ones.
    Dennis


    Thermal Arc 185-TSW
    Millermatic Challenger 172
    VictorO/A
    Atlas Craftsman 12 by 24 Lathe
    Esab PCM-875
    Wholesale Tool Mill-Drill

    Comment


    • #3
      OVERrating components is never an issue (other than maybe a financial one). Underrating them, on the other hand, may produce a lot of smoke. Assuming that the scr's are going on the input side of the transformer, 90A is way overkill, but will work fine. Make sure the voltage ratings are correct. I would make sure it's over 300V.

      Nick

      Comment

      Working...
      X