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Z-11 Question

 
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david.nelson(at)pobox.com
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PostPosted: Thu Feb 25, 2010 7:54 pm    Post subject: Z-11 Question Reply with quote
Hi Bob,

Looking at Z-11/M, why is the endurance bus protected by a fuse from the
battery bus but not the main bus? Is it just for the sake of the switch or
something else?

Thank you,
/\/elson

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nuckolls.bob(at)aeroelect
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PostPosted: Fri Feb 26, 2010 2:49 pm    Post subject: Z-11 Question Reply with quote
At 09:15 PM 2/25/2010, you wrote:
Quote:

Hi Bob,

Looking at Z-11/M, why is the endurance bus protected by a fuse from
the battery bus but not the main bus? Is it just for the sake of
the switch or something else?

Fuses, breakers, et. als. protect WIRES. They're not
well applied for the protection of hardware. There's
a long feeder from a VERY robust current source
quite capable of toasting the alternate feed path
wiring . . . hence the fuse or breaker at the battery
end. The other end is short wires that hopefully
conform with the 6" or less rule that says protection
MIGHT not be all that useful or necessary.

Bob . . .

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david.nelson(at)pobox.com
Guest
PostPosted: Mon Mar 01, 2010 8:02 am    Post subject: Z-11 Question Reply with quote
Thank you, Bob.

/\/elson

~~ Lately my memory seems to be like a steel trap .... without any spring. ~~

On Fri, 26 Feb 2010, Robert L. Nuckolls, III wrote:

Quote:

<nuckolls.bob(at)aeroelectric.com>

At 09:15 PM 2/25/2010, you wrote:
>
> <david.nelson(at)pobox.com>
>
>
> Hi Bob,
>
> Looking at Z-11/M, why is the endurance bus protected by a fuse from the
> battery bus but not the main bus? Is it just for the sake of the switch or
> something else?

Fuses, breakers, et. als. protect WIRES. They're not
well applied for the protection of hardware. There's
a long feeder from a VERY robust current source
quite capable of toasting the alternate feed path
wiring . . . hence the fuse or breaker at the battery
end. The other end is short wires that hopefully
conform with the 6" or less rule that says protection
MIGHT not be all that useful or necessary.

Bob . . .


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