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Fuse and Breaker - one bus

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toaster73(at)embarqmail.c
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Posted: Tue May 20, 2008 5:19 pm Post subject: Fuse and Breaker - one bus

I have been lurking here for a few years trying to absorb the power of 

aeroelectric but I am having trouble jumping from the schematics to the 

physical configuration.

I am having trouble with the physical configuration of my RV-10 electrical 

system design.  I am trying to draw up a Z-13 style system but I think I 

want my E-Bus to have a breaker for trim, flaps etc but the rest I want to 

use a fuse block.  What would be a good way to combine the  fuse and breaker 

block into one bus? Just run same gage wire to the e-bus primary and 

alternate feed to the fuse block and  split off from block with same gage 

wire to the bar for the breakers?

thanks in advance

Chris Lucas

RV-10 #40072

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vaughnray(at)bvunet.net
Guest

Posted: Tue May 20, 2008 6:53 pm Post subject: Fuse and Breaker - one bus

The fuse block is your endurance bus. I would run a wire to the fuse block 

post that would handle the combined loads on the fuse block and the load on 

your breaker bar. I would then run a wire from the post on the fuse block to 

the breaker bar that was large enough to handle the combined loads of all 

the breakers.



I once had an MGTF with Lucas electrics. Are you should be wiring?  



Vaughn Teegarden

Trying to figure it out myself...Don't listen to me.



---

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nuckolls.bob(at)cox.net
Guest

Posted: Tue May 20, 2008 7:37 pm Post subject: Fuse and Breaker - one bus

At 09:16 AM 5/20/2008 -0400, you wrote:



 	  Quote: 	
		  



I have been lurking here for a few years trying to absorb the power of 

aeroelectric but I am having trouble jumping from the schematics to the 

physical configuration.

I am having trouble with the physical configuration of my RV-10 electrical 

system design.  I am trying to draw up a Z-13 style system but I think I 

want my E-Bus to have a breaker for trim, flaps etc but the rest I want to 

use a fuse block.  What would be a good way to combine the  fuse and 

breaker block into one bus? Just run same gage wire to the e-bus primary 

and alternate feed to the fuse block and  split off from block with same 

gage wire to the bar for the breakers?

thanks in advance


	


   The e-bus is for things that you need during the en-route

   mode of flight to maximize utilization of a limited resource.

   If you're planning Z-13/8, then the e-bus can be easily

   configured to handle an endurance load of 8 amps.



   The idea is that when the airport is in sight that you

   can bring the main bus back on for using the battery to

   run anything on the main bus using a battery that's held

   completely in reserve for approach to landing.



   What's your rationale for breakers on these two systems?

   Runaway disconnect? Breakers are exceedingly poor substitutes

   for master disconnect systems . . . if indeed runaway is

   a high order probability for creating a hazard. It's

   probably easier to design a system that can't run away.

   In other words, trim is an exceedingly low duty-cycle

   load that runs happily from the e-bus . . . Flaps too

   for that matter . . . but they aren't needed until approach

   to landing and could stay on the main bus. I guess we

   need to understand your concnerns.



   Bob . . .

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toaster73(at)embarqmail.c
Guest

Posted: Thu May 22, 2008 6:24 pm Post subject: Fuse and Breaker - one bus

Thanks Bob.  I see your point and will continue along those lines you 

describe.  I have been thinking I may want to see an indication of a failure 

on certain items by seeing that breaker button pop out. Is that really 

something I need to see or know or do I use another indicator like a light?

-Chris



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toaster73(at)embarqmail.c
Guest

Posted: Thu May 22, 2008 6:29 pm Post subject: Fuse and Breaker - one bus

Vaughn,

I had an MGB and am familiar with the Prince of Darkness. Your right I 

probably should not be doing wiring - to me this is the coolest part of the 

project when its done, but the worst to figure out and build. I am a 

mechanical guy through and through.

-Chris



---

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