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TRIAC - Protection Methods

Discussion in 'General Electronics Discussion' started by Sbchand, Oct 22, 2018.

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  1. Sbchand

    Sbchand

    2
    0
    Oct 22, 2018
    HI,

    I am working with a Triac to control a 230V 60W incadancent bulb. The problem is that when the bulb fuses it take away the Triac as well. after a bit of a research I found out that it was due to short circuit. I tried adding a fuse to no avail. Is there any other method? any help will be much appreciated.

    Thanks
    SBC
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    When a bulb fuses it normally goes open circuit which can cause a large change in voltage across the triac in a very short time.
    Look up triac snubber circuits. These are used to limit dv/dt across the triac.
     
  3. Sbchand

    Sbchand

    2
    0
    Oct 22, 2018
    Hi, Thanks for replying.
    Yes they do go open circuit but the filament sometimes falls in such manner that they cause dead short circuit between L and N.
    Thanks once again
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

    10,614
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    Nov 17, 2011
    For this a fuse is the right protection.
     
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