Matronics Email Lists :: View topic - Z13/8 over current protection

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Z13/8 over current protection

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

jpx(at)qenesis.com
Guest

Posted: Sun Nov 18, 2007 8:31 am Post subject: Z13/8 over current protection

Based on Bob's previous comments, I have decided that Z13/8 is more  

suitable for my aircraft.



Should I include an ANL limiter between the battery contactor and the  

main power bus ?

Perhaps the fuselink shown between the endurance bus and the alternate  

feed switch might provide more encompassing protection located between  

the main power bus and the diode ?

Why both a fuselink and a breaker in the feed from the main power bus  

to the regulator ?



Thanks !

Jeff Page

Tundra #10

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

nuckolls.bob(at)cox.net
Guest

Posted: Sun Nov 18, 2007 8:21 pm Post subject: Z13/8 over current protection

At 11:28 AM 11/18/2007 -0500, you wrote:



 	  Quote: 	
		  



Based on Bob's previous comments, I have decided that Z13/8 is more

suitable for my aircraft.



Should I include an ANL limiter between the battery contactor and the

main power bus ?


	


  There is not one shown because this pathway has

  not been demonstrated to benefit from adding the

  protection . . . in fact, the FARS exempt this piece

  of wire from getting such protection in TC aircraft.



 	  Quote: 	
		  Perhaps the fuselink shown between the endurance bus and the alternate

feed switch might provide more encompassing protection located between

the main power bus and the diode ?


	


   ?? the purpose of this link is to protect the wire

   between the battery bus and the switch. Moving it

   someplace else would not help that wire . . .



 	  Quote: 	
		  Why both a fuselink and a breaker in the feed from the main power bus

to the regulator ?


	


    Because if the main bus is a fuse block -AND- it's remotely mounted

    for convenience of installation and maintenance then it's also

    remote to the panel where the 5A breaker needs to go. This puts a

    longer-than-6-inches hot wire between the fuse block and the

    breaker that is part of the crowbar ov protection system and should

    be mounted on the panel. This piece of wire is best protected with

    a fusible link having a fault-reaction response-time that is

    longer than for the breaker. If you used a fuse here, the fuse

    would open before the breaker does and negate the convenience

    of putting the breaker on the panel. See:



http://www.aeroelectric.com/PPS/Switch_Panels/spanel.pdf



http://www.aeroelectric.com/PPS/Switch_Panels/Switches.pdf



    Bob . . .

        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

jpx(at)qenesis.com
Guest

Posted: Mon Nov 19, 2007 10:23 pm Post subject: Z13/8 over current protection

 	  Quote: 	
		   >Perhaps the fuselink shown between the endurance bus and the alternate

 >feed switch might provide more encompassing protection located between

 >the main power bus and the diode ?



    ?? the purpose of this link is to protect the wire

    between the battery bus and the switch. Moving it

    someplace else would not help that wire . . .


	


To me, it would seem that the wire between the Battery Bus and E-Bus  

Alternate Feed switch is protected by the 7A fuse from the Battery Bus ?

If a short to ground occurred in that wire, and the 7A Battery Bus  

fuse blows, then the source of power becomes the Main Power  

Distribution Bus if the E-Bus Alternate Switch is closed.  The  

fuselink as shown blows.

If the fuselink is moved to between the Diode and the Main Power  

Distribution Bus, the fuselink would still blow, but would also  

protect the wires connecting the diode - those have no protection at  

all as shown ?



Jeff Page

Dream Aircraft Tundra #10

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum