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z-13/8

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pete.howell(at)gecko-grou
Guest

Posted: Sat Jan 27, 2007 8:31 pm Post subject: z-13/8

Hello,



I am helping a friend design an electrical system for his RV-7A.   We are

working with Z-13/8 and have come up with a few questions.



1)If the main alt and the SD-8 are both on line(should they ever be?), how

does the system balance the power from the 2 alternators?  Do you need to

worry about power feeding back into the SD-8 from the main alternator?



2)Can you test to see that the SD-8 is working with out turning off the main

alternator?  If so, how?



Thanks,



Pete

Z-11 with P-mags

65 hours and going strong

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nuckollsr(at)cox.net
Guest

Posted: Sat Jan 27, 2007 9:49 pm Post subject: z-13/8

At 10:30 PM 1/27/2007 -0600, you wrote:

 	  Quote: 	
		  

<pete.howell(at)gecko-group.com>



Hello,



I am helping a friend design an electrical system for his RV-7A.   We are

working with Z-13/8 and have come up with a few questions.



1)If the main alt and the SD-8 are both on line(should they ever be?), how

does the system balance the power from the 2 alternators?  Do you need to

worry about power feeding back into the SD-8 from the main alternator?


	


  SD-8 backs up the main alternator. They are not intended to

  operate in concert with each other. See the rationale for

  Z-13/8 architecture on page 17-10 of the 'Connection.

 	  Quote: 	
		  2)Can you test to see that the SD-8 is working with out turning off the main

alternator?  If so, how?


	


   No, that's the way you do it. One alternator on at a time

   to see that it picks up it's expected duties independently

   of the other.



   Bob . . .

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