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TRIAC - Protection Methods

Sbchand

Oct 22, 2018
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Oct 22, 2018
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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
 

Harald Kapp

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Nov 17, 2011
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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.
 

Sbchand

Oct 22, 2018
2
Joined
Oct 22, 2018
Messages
2
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.
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
 
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