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Mounting fuse blocks

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dmasys(at)cox.net
Guest

Posted: Mon Jun 05, 2006 3:58 pm Post subject: Mounting fuse blocks

If you happen to be using the Aeroelectric approach of using fuse blocks instead of (or along with) breakers,  one way of mounting the fuse holders so they are out of the way but accessible when needed is to put them on a hinged panel between the panel and subpanel.  Just got mine cut and installed.  These pics show the essential buss block (20 fuse positions), main block (10 position) and battery block (6 position), separated by the diode mounted to a heat sink from B&C specialties:



Seen from above:

http://132.239.155.44/rv10/2006-06-05_fuseblockmount.jpg



and below, where a Dzus cowl  fastener keeps the plate in place

http://132.239.155.44/rv10/2006-06-05_fuseblockmount_b.jpg



One half twist of the cowl fastener the the plate drops down vertically for access to the fuses.



-Dan Masys

#40448

ron.mcgann(at)baesystems.
Guest

Posted: Mon Jun 05, 2006 4:08 pm Post subject: Mounting fuse blocks

Dan   

Precisely what I was about to do (including fuse block selection) - thanks for the pics.  But man, that is one BIG heatsink   

Ron   

--

dmasys(at)cox.net
Guest

Posted: Mon Jun 05, 2006 6:49 pm Post subject: Mounting fuse blocks

It's the standard heatsink/diode combination that comes from B&C.  On my RV-7 I just mounted the diode to some 0.063 plate and it got so hot it melted in the insulation on the downstream wire!  (Also showed increasing internal resistance with heat, so the voltage would drop on the e-Bus).  Live and learn.



-Dan Masys



---- "McGANN wrote: 

 	  Quote: 	
		   Dan

 

 Precisely what I was about to do (including fuse block selection) - thanks for the pics.  But man, that is one BIG heatsink 

 

 Ron

KiloPapa

Joined: 24 May 2006
Posts: 142
Location: Pearblossom, CA

Posted: Mon Jun 05, 2006 9:44 pm Post subject: Re: Mounting fuse blocks

Looks nice.  Where did you get the fuse blocks?



Thanks,



Kevin

40494

jesse(at)itecusa.org
Guest

Posted: Tue Jun 06, 2006 2:55 am Post subject: Mounting fuse blocks

Very nice.



Jesse



 	  Quote: 	
		   



 If you happen to be using the Aeroelectric approach of using fuse blocks

 instead of (or along with) breakers,  one way of mounting the fuse holders

 so they are out of the way but accessible when needed is to put them on a

 hinged panel between the panel and subpanel.  Just got mine cut and

 installed.  These pics show the essential buss block (20 fuse positions),

 main block (10 position) and battery block (6 position), separated by the

 diode mounted to a heat sink from B&C specialties:

  do not archive

 Seen from above:

 http://132.239.155.44/rv10/2006-06-05_fuseblockmount.jpg



 and below, where a Dzus cowl  fastener keeps the plate in place

 http://132.239.155.44/rv10/2006-06-05_fuseblockmount_b.jpg



 One half twist of the cowl fastener the the plate drops down vertically

 for access to the fuses.



 -Dan Masys

 #40448






	




Jesse Saint

I-TEC, Inc.

jesse(at)itecusa.org

www.itecusa.org

rvreynolds(at)macs.net
Guest

Posted: Tue Jun 06, 2006 4:03 am Post subject: Mounting fuse blocks

Have you checked access with the brakes installed?



Richard Reynolds

Norfolk, VA

jesse(at)itecusa.org
Guest

Posted: Tue Jun 06, 2006 5:12 am Post subject: Mounting fuse blocks

That looks like it is from the bulkhead to the panel support, so it should

be aft of the brakes.  The only problem in-flight would be getting your legs

out of the way so you could flip it down, but in most cases where you are

blowing a fuse, putting another one in is probably not going to fix the

problem.  The blown fuse is just evidence that there is a problem that needs

to be fixed.



Do not archive.



Jesse Saint

I-TEC, Inc.

jesse(at)itecusa.org

www.itecusa.org

W: 352-465-4545

C: 352-427-0285

--

Ray.R.Doerr(at)sprint.com
Guest

Posted: Tue Jun 06, 2006 5:18 am Post subject: Mounting fuse blocks

            I did the same thing but installed mine on the pilot side because I had my heater controls on the right side and they go through the lower switch panel and then under the sub-panel.  You may have to think about where you are planning to install all you push/pull cables for stuff like Alternate Air, Parking Brake and Front and Rear Heat.  

     

Thank You

 Ray Doerr

 40250  

N519RV (28 hours on it now)   

  

--

Rick S.

Joined: 12 Feb 2006
Posts: 347
Location: Las Vegas

Posted: Tue Jun 06, 2006 5:51 am Post subject: Mounting fuse blocks

I'm using the one with the heatsink, I have not powered it up but are you saying the voltage drop has been resolved by using the heatsink or is is specific to the unprotected diode?



Rick S.

40185

_________________
Rick S.
RV-10
40185

brinker(at)cox-internet.c
Guest

Posted: Tue Jun 06, 2006 5:54 am Post subject: Mounting fuse blocks

I was considering something similar but after reading some on the 

Aeroelectric list and from my experience with automobile fuses is just as 

you have said. Most of the time no need to replace a blown fuse until the 

problem itself is fixed. Although would be nice to have access to them 

during flight. Oh decisions decisions.



Randy



---

dmasys(at)cox.net
Guest

Posted: Tue Jun 06, 2006 8:40 am Post subject: Mounting fuse blocks

Yes, it is fine with respect to the brakes.   Lots more room in the -10 than in the two place forward fuselage.  Originally got the idea from Andy Karmy whose installation in his -9A is shown here:



http://www.karmy.com/rv9a/pictures/fuselage/electrical/img_0022.htm



-Dan Masys

---- Richard Reynolds <rvreynolds(at)macs.net> wrote: 

 	  Quote: 	
		   

 

 Have you checked access with the brakes installed?

 

 Richard Reynolds

 Norfolk, VA

dmasys(at)cox.net
Guest

Posted: Tue Jun 06, 2006 8:45 am Post subject: Mounting fuse blocks

B & C specialty products has all of the stuff one needs to wire up a plane by the Aeroelectric ('lectric Bob) approach:



Fuse blocks are at:

http://www.bandcspecialty.com/cgi-bin/ez-catalog/cat_display.cgi?7X358218



TerminalTown also has them at:



http://www.terminaltown.com/Pages/Page204.html



Hope this helps,

-Dan Masys

---- KiloPapa <kilopapa(at)antelecom.net> wrote: 

 	  Quote: 	
		   

 

 Looks nice.  Where did you get the fuse blocks?

 

 Thanks,

 

 Kevin

 40494

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=38870#38870

dmasys(at)cox.net
Guest

Posted: Tue Jun 06, 2006 8:54 am Post subject: Mounting fuse blocks

In my -7A the heat-sinked diode has a constant voltage drop (about 0.8 volts) between main buss and e-buss.  The old diode, mounted to the plate with the fuseblocks but not separately heat-sinked, would start with a 0.8 volt drop, but as load was added to the e-bus (in particular the TruTrak autopilot, whose load varies with the amount of turbulence due to stepping motor activity and can be up to 7.5a) the voltage drop would go as high as 2.5 volts as it heated up, causing low voltage alarms from the Grand Rapids EIS, which was powered from the e-Bus.  Would also occasionally cause the transponder to hiccup.  Not a good scene.



-Dan 



---- Rick <ricksked(at)earthlink.net> wrote: 



 	  Quote: 	
		   I'm using the one with the heatsink, I have not powered it up but are you saying the voltage drop has been resolved by using the heatsink or is is specific to the unprotected diode?

 

 Rick S.

 40185

pitts_pilot(at)bellsouth.
Guest

Posted: Tue Jun 06, 2006 9:02 am Post subject: Mounting fuse blocks

Jesse Saint wrote:



 	  Quote: 	
		  



That looks like it is from the bulkhead to the panel support, so it should

be aft of the brakes.  The only problem in-flight would be getting your legs

out of the way so you could flip it down, but in most cases where you are

blowing a fuse, putting another one in is probably not going to fix the

problem.  The blown fuse is just evidence that there is a problem that needs

to be fixed.



And while you're preoccupied with the fuses, you aren't flying the 
	


plane, checking for traffec etc.!!!  Best to wait 'till you're back on 

solid ground.  IMHO, of course 

Linn



 	  Quote: 	
		  

Do not archive.



Jesse Saint

I-TEC, Inc.

jesse(at)itecusa.org

www.itecusa.org

W: 352-465-4545

C: 352-427-0285

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