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Z13/8 questions

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jmcburney(at)pobox.com
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Posted: Mon Jul 14, 2008 6:40 am Post subject: Z13/8 questions

Bob,



I'm designing the electrical system for my Zenith CH801 based on Z13/8.  Two

questions:



1.  Would it be an advantage to use the B&C LR3 regulator (a.l.a. Z13/20)

rather than the "generic Ford", and why or why not?



2.  In rev. P you have interposed a relay in the E-bus alternate feed line.

What's your reason for this?  It seems to be another single point of failure

in a simple circuit.



I'm attaching my modified drawing.  Comment on it if you wish.  Thanks.

Blue skies and tailwinds



Jim

CH-801

DeltaHawk diesel

Augusta GA

90% done, 90% left

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nuckolls.bob(at)cox.net
Guest

Posted: Mon Jul 14, 2008 7:43 am Post subject: Z13/8 questions

At 10:35 AM 7/14/2008 -0400, you wrote:

 	  Quote: 	
		  Bob,



I'm designing the electrical system for my Zenith CH801 based on Z13/8.  Two

questions:



1.  Would it be an advantage to use the B&C LR3 regulator (a.l.a. Z13/20)

rather than the "generic Ford", and why or why not?


	


  These are ARCHITECTURE drawings . . . you can consider ANY alternative

  components suited to your task. Yes, the LR3 is a very capable, all-in-one

  alternator controller that includes adjustable remote sensing regulation,

  lv warning, ov protection in a single package. If you don't object to

  the price, it's an entirely acceptable alternative.

 	  Quote: 	
		  2.  In rev. P you have interposed a relay in the E-bus alternate feed line.

What's your reason for this?  It seems to be another single point of failure

in a simple circuit.


	


  When we added the 8A alternator, the e-bus continuous

  load capability went up to 8A, a bit high for an always

  hot lead from the battery bus (tradition says 5A max

  but a FUSED lead is much less likely to start a fire

  than a BREAKERED lead). If you'd like to stay with the

  previous architecture and fuse the alternate feed at

  10A, I wouldn't have any heartburn over it. You presently

  show a 15A fuse which I presume is intended to support

  peak loads, I think I'd put the relay in.

 	  Quote: 	
		  I'm attaching my modified drawing.  Comment on it if you wish.  Thanks.

Blue skies and tailwinds


	


  You need to add the resistor across the SD-8 filter capacitor

  as part of the self-excitation feature.



  Fusible link in the main bus feeder is not necessary.



  It's unfortunate that you can't find a 12v starter

  to fit your engine but the second battery arrangement

  will probably work for you.



  I've .pdf'ed your drawing and attached to this response

  so that others on the list can see what we're talking about.



        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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