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High Current Diodes

 
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scott(at)randolphs.net
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PostPosted: Mon Feb 27, 2006 11:06 pm    Post subject: High Current Diodes Reply with quote

Instead of a contactor and switch why not use one of these high current
diodes to protect a ground power plug (power in but not out)? Or at least
to eliminate the need for a disconnect switch by preventing "back flow" from
engergizing the contactor? Would these also be appropriate for feeding a
larger secondary bus?

http://www.surplussales.com/Semiconductors/Diodes-3.html

Or is there a dangerous failure mode or quirk in their specs I'm missing?

Thanks!

Scott.


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nuckollsr(at)cox.net
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PostPosted: Tue Feb 28, 2006 5:23 am    Post subject: High Current Diodes Reply with quote

At 10:59 PM 2/27/2006 -0800, you wrote:

Quote:


Instead of a contactor and switch why not use one of these high current
diodes to protect a ground power plug (power in but not out)? Or at least
to eliminate the need for a disconnect switch by preventing "back flow" from
engergizing the contactor? Would these also be appropriate for feeding a
larger secondary bus?

http://www.surplussales.com/Semiconductors/Diodes-3.html

Or is there a dangerous failure mode or quirk in their specs I'm missing?

Thanks!


Depends on your design goals for ground power functionality.
I produced the article at:

http://aeroelectric.com/articles/grndpwr.pdf

. . . based on requests for a ground power installation.
After having experienced a situation where the guy on the
ground had his back to me when he shot 28v to my 14v airplane
that I crafted a system with reverse polarity protection,
absolute control of incoming power by pilot -AND- ov
protection.

Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >


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