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alternator relay connection

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mhilderbrand

Joined: 28 Sep 2006
Posts: 36

Posted: Wed May 20, 2009 5:56 am Post subject: alternator relay connection

Hi everyone, 

  

 Looking at Z-20 for the Jab 3300 engine, I notice off the alternator relay the "COM" wire goes to the Starter Contactor.  On my plane I  also have a Batt Contactor. Is there a reason I cannot or should not connect the COM wire to the Batt Contactor instead? I am assuming if connected to the starter contactor (like on Z-20) that the current would still flow through the Batt Contactor (for a lack of better term - going "up stream") to charge the battery?  

 

 Thanks! 

  

Michael Hilderbrand

Derby, Kansas

Http://www.kansasflying.com

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed May 20, 2009 6:30 am Post subject: alternator relay connection

At 08:46 AM 5/20/2009, you wrote:

 	  Quote: 	
		  Hi everyone,



Looking at Z-20 for the Jab 3300 engine, I notice off the alternator 

relay the "COM" wire goes to the Starter Contactor.  On my plane 

I  also have a Batt Contactor. Is there a reason I cannot or should 

not connect the COM wire to the Batt Contactor instead? I am 

assuming if connected to the starter contactor (like on Z-20) that 

the current would still flow through the Batt Contactor (for a lack 

of better term - going "up stream") to charge the battery?


	


   Wires are roadways for electrons. You can move

   intersections between roadways such that the

   electrons can still get from here to there.



   If you have a battery contactor on a system

   with a small alternator, you might want to

   consider a low-energy contactor like the EV200

   we discussed earlier this week . . . or add the

   Contator Power Manager I spoke of earlier this

   week.



   This decision can wait however . . . get

   everything working first and then think about

   decorations on the cake.

        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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