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Battery bus location and Hall-effect sensor

 
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nuckollsr(at)cox.net
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PostPosted: Mon Jan 16, 2006 11:41 am    Post subject: Battery bus location and Hall-effect sensor Reply with quote

At 12:41 PM 1/16/2006 -0500, you wrote:

Quote:


OK, staring at Z-13 for hours has diminished the fog somewhat, but a few
questions remain

(1)For my RV-7A, I was planning on putting my main and e-bus fuse panels on
the right hand side of the subpanel. But what about the battery bus? Z-13
suggests that the battery bus be located within six inches of the battery
contactor, which in my case, is on the firewall. This appears to limit my
battery bus location to the firewall as well, no? Guess I could live with
that, except that its my understanding that fuses necessary for flight
safety be accessible during flight.

Which of your fuses need access for "flight safety" reasons?

Quote:
Since electronic ignition and e-bus
alt feed come from the battery bus, wouldnt the firewall location be a
no-no?

Review chapter 17. The numbers of failures that render
a system unusable and DO NOT blow a fuse outnumber the things
that DO blow fuses by several orders of magnitude. Further, if
you DO open a fuse in some necessary system, what is the likelihood
that you'll get that system back by replacing the fuse? The fault
that opened the fuse is still going to be there waiting for your
new fuse. Bottom line is that if you have any system that's necessary
for comfortable completion of flight, then you'd better have
a backup for it and being able to access breakers or fuses for
those systems is wishful thinking.
Quote:
(2) Im using a GRT EFIS, which comes with one Hall-effect sensor. I
believe this can replace the shunt for the main alternator B-lead on Z-13.
Is is possible and practical that the same sensor can also go around the
lead for the backup SD-8 PM alternator, since both alternators wont be
operating at the same time, or do I need two separate Hall-effect sensors?

No, one sensor will work nicely for both systems.

Bob . . .


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