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Z-19 Series Architecture

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Mark Sletten

Joined: 10 Jan 2006
Posts: 43
Location: St. Jacob, IL (Near St. Louis, MO)

Posted: Tue Mar 04, 2008 8:55 am Post subject: Z-19 Series Architecture

Bob,



On the Z-19 rev M and Z-19/RB rev A drawings the E-BUS normal feed is from

the Main PWR Dist block thru a 7A breaker and diode.



On all other drawings it appears the E-BUS normal feed is directly off the

Main PWR Dist Block binding post (not a breaker) thru a diode.



Is there a reason for the different setup on the Z-19 series?

Regards,



Mark Sletten

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_________________
Mark Sletten
Legacy FG N828LM
http://www.legacyfgbuilder.com

Mark Sletten

Joined: 10 Jan 2006
Posts: 43
Location: St. Jacob, IL (Near St. Louis, MO)

Posted: Sat Mar 08, 2008 5:36 am Post subject: Re: Z-19 Series Architecture

Bob,



I was wondering if you had a chance to take a look at the Z-19 drawings in response to my inquiry.



Specifically, the latest revs of the Z-19 drawings on your website show the E-bus normal feed on a fused connection from the primary bus. Is there a reason for supplying the E-bus on the Z-19 drawings this way?



Regards,



Mark

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_________________
Mark Sletten
Legacy FG N828LM
http://www.legacyfgbuilder.com

Mark Sletten

Joined: 10 Jan 2006
Posts: 43
Location: St. Jacob, IL (Near St. Louis, MO)

Posted: Wed Mar 12, 2008 7:05 am Post subject: Re: Z-19 Series Architecture

Listers,



I've posted this question a couple of times via the Matronics Forum interface, but I've not gotten a response.



My posts are coming back to me via the daily list digest, but I'm not sure Bob is getting them. Should I email directly to the Matronics list instead of posting via the Forum?



Regards,



Mark

 	  Mark Sletten wrote: 	
		  Bob,



On the Z-19 rev M and Z-19/RB rev A drawings the E-BUS normal feed is from

the Main PWR Dist block thru a 7A breaker and diode.



On all other drawings it appears the E-BUS normal feed is directly off the

Main PWR Dist Block binding post (not a breaker) thru a diode.



Is there a reason for the different setup on the Z-19 series?

Regards,



Mark Sletten

- The Matronics AeroElectric-List Email Forum -

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_________________
Mark Sletten
Legacy FG N828LM
http://www.legacyfgbuilder.com

mikefapex

Joined: 05 Jul 2007
Posts: 70
Location: Colorado

Posted: Wed Mar 12, 2008 7:50 am Post subject: Re: Z-19 Series Architecture

Mark,



Your posts are getting through, I've not seen any replies to your question either.



There was a related Z19 question a few weeks before xmas about updating the Z19 to reflect separate power feeds for coils (and possibly injectors). No further replies seen on that either. 



Mike

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longg(at)pjm.com
Guest

Posted: Wed Mar 12, 2008 8:50 am Post subject: Z-19 Series Architecture

Mark,

I questioned that too. Not sure I ever got a strait answer. As far as I

am concerned that constitutes the weakest link for what is supposed to

be an essential bus system. 



I did see something Bob mentioned about the feed coming from both ends.

One side is fed from the 7A fuse, and the other from the switch which is

powered via the backup battery via its contactor switch. I believe Bob's

logic is that one will backup the other. If you turn the switch off, the

e-bus still has 7A and if you lose the 7A job, the switch will power the

e-bus through via the backup battery contactor. The diode keeps the

juice from going back other way (through the fuse) when powered by the

switch.



Earlier I questioned the 7A limit, but if you start breaking down the

load, that can support a lot of today's panel. A Dynon and an sl30 are

still within values. That's all I need to get down. The fuel pumps,

ignition and engine stuff would all feed off of the secondary power

switch not the e-bus.



To hell with idealism - for my Sub, the e-bus will work both ways based

on the intended design or an improvement in it. 7A is not going to make

anything glow. In an emergency we'll be glad for the 7A. 



What I think is missing or confusing is the process (a standard issue

for technos). Be sure you have a sound practice for throwing switches

and knowing what is working etc. I may even include a warning light

which closes if that ole 7A takes a pill.



How'z that project going?



Glenn



http://n661gl.blogspot.com



--

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nuckolls.bob(at)cox.net
Guest

Posted: Wed Mar 12, 2008 9:33 am Post subject: Z-19 Series Architecture

 	  Quote: 	
		  Mark Sletten wrote:

 > Bob,

 >

 > On the Z-19 rev M and Z-19/RB rev A drawings the E-BUS normal feed is from

 > the Main PWR Dist block thru a 7A breaker and diode.

 >

 > On all other drawings it appears the E-BUS normal feed is directly off the

 > Main PWR Dist Block binding post (not a breaker) thru a diode.

 >

 > Is there a reason for the different setup on the Z-19 series?


	


   No reason other than observance practice for protecting

   any small wire feeder of 6" or more in length. If the e-bus

   is located right next to the main bus fuse block, then you

   can make direct connections through the diode without

   fuses or breakers to protect the wires.



   Bob . . .

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nuckolls.bob(at)cox.net
Guest

Posted: Wed Mar 12, 2008 9:34 am Post subject: Z-19 Series Architecture

At 08:50 AM 3/12/2008 -0700, you wrote:



 	  Quote: 	
		  



Mark,



Your posts are getting through, I've not seen any replies to your question 

either.



There was a related Z19 question a few weeks before xmas about updating 

the Z19 to reflect separate power feeds for coils (and possibly 

injectors). No further replies seen on that either.


	


   I'm not in a position at present to modify the

   Z-figures for the purpose of customizing. Remember,

   these are intended to illustrate architectures that

   offer attractive failure modes effects analysis,

   I.e, failure tolerance.



   Exactly what loads are tied to what busses by what

   sizes of wire/fuse is up to the builder to work out

   as appropriate to their particular engine and

   suite of appliances.



   Bob . . .

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