mprather(at)spro.net
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 Posted: Thu Jul 05, 2007 3:13 pm Post subject: Clarification between: main/essential/battery bus? |
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It's been a while since I've thought about this, but here are a couple of
items:
- The "essential bus" has been renamed to "endurance bus" to make the
name more accurately reflect the purpose - namely to efficiently provide
power to the items that you need in order to comfortably complete a
flight after the failure of the primary electrical energy source
(alternator). Switching the main bus off and leaving the endurance bus
on offers a single switch method of load shedding..
- The battery bus should power the items that are needed to keep the
engine running while the rest of the electrical system is de-energized.
If your engine has EFI or electronic ignition, it should probably powered
from the battery bus. Additionally, certain accessories might be powered
from the battery bus - maybe a cabin courtesy/panel light.
Nav/comm/txp equipment shouldn't be on the battery bus - not required for
keeping the engine running. An EFI fuel pump shouldn't be on the
endurance bus..
Regards,
Matt-
| Quote: |
Hi,
I'm a new aircraft owner and am considering reworking the electrical
system, and my av electric knowledge is rudimentary. I am having a hard
time understanding the difference between the main, essential, and battery
bus. I've have, and have read the AeroConnection and the figure 17-3 is
what I think I'd like to get to given my aircraft and flying type.
I guess I am mostly confused over what is essential vs battery bus. I
would think anything categorized as essential would need to be on the
battery bus too.
Thanks for any clarification,
Mike
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=122419#122419
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