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user9253
Joined: 28 Mar 2008
Posts: 1928
Location: Riley TWP Michigan
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 Posted: Sat Oct 25, 2014 5:03 am Post subject: Jeff's aircraft electrical schematic |
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Jeff attached this schematic to the RV-14 thread.
http://forums.matronics.com/download.php?id=39981
Jeff, has this architecture been used in a flying aircraft yet?
I like it and think that it deserves peer review.
I think that the 60 amp alternator fuse and 100 amp battery current limiter are redundant. An alternator is self current limiting. An alternator fuse protects the battery and wires, not the alternator. So I suggest that the 100 amp battery fuse be replaced by a 60 amp fuse, and eliminate the 60 amp fuse in the alternator circuit.
Joe
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Joe Gores |
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jluckey(at)pacbell.net
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| Posted: Sat Oct 25, 2014 8:09 am Post subject: Jeff's aircraft electrical schematic |
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Joe,
I've been in discussions w/ several builders, both on this List and off, who asked many questions and for permission to use this design. But as far as I know, no one is flying it yet. My airplane is probably two years away from flying.
Re 60A fuse:
You are correct, the fuse is not to protect the alternator. It is to protect the wire (the "B" lead) going to the alternator. If that wire were to go to ground, we want that 60A to blow.
Without that fuse, the next fuse up the chain is the 100A "main" fuse and we don't want a wire problem w/ the alternator B lead to kill the Battery A system.
BTW - I appreciate the ongoing analysis & scrutiny - makes us all smarter,
-Jeff
On Saturday, October 25, 2014 6:03 AM, user9253 <fransew(at)gmail.com> wrote:
--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>
Jeff attached this schematic to the RV-14 thread.
http://forums.matronics.com/download.php?id=39981
Jeff, has this architecture been used in a flying aircraft yet?
I like it and think that it deserves peer review.
I think that the 60 amp alternator fuse and 100 amp battery current limiter are redundant. An alternator is self current limiting. An alternator fuse protects the battery and wires, not the alternator. So I suggest that the 100 amp battery fuse be replaced by a 60 amp fuse, and eliminate the 60 amp fuse in the alternator circuit.
Joe
--------
Joe Gores
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