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High Current Diodes

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

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
Guest

Posted: Tue Feb 28, 2006 5:23 am Post subject: High Current Diodes

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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