Today's Message Index:
----------------------
1. 08:42 AM - Electrical System Review (jonlaury)
2. 03:20 PM - Re: Circuit Diagram Z-19 (Robert L. Nuckolls, III)
3. 04:06 PM - Location of Batteries and Master Relays (Robert Reed)
4. 04:49 PM - Re: Location of Batteries and Master Relays (Ron Burnett)
5. 05:37 PM - Re: Electrical System Review (Robert L. Nuckolls, III)
6. 06:28 PM - Re: Electrical System Review (Robert L. Nuckolls, III)
7. 06:46 PM - Re: Electrical System Review (jonlaury)
8. 06:56 PM - Re: Location of Batteries and Master Relays (Robert Reed)
Message 1
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| Subject: | Electrical System Review |
The thread about "Why does a master switch..." prompted me to take a look at my
own electrical system.
I haven't been to the hangar to look at how my system is actually wired, but in
review of my schematic, (particularly, everything left of the Main Bus)there
were some glaring deficiencies re-wiring of OVM's , and the Ground Power circuit,
and perhaps the Battery Bus, given the total load and the need for a switch/relay.
And I was surprised to see that, with engine running, the Main bus is
always hot.
I would appreciate any comments to make this better.
Thanks,
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=408673#408673
Attachments:
http://forums.matronics.com//files/z8_20td_final_187.pdf
Message 2
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| Subject: | Re: Circuit Diagram Z-19 |
At 01:34 PM 9/16/2013, you wrote:
>Bob...
>
>With a MPEFIed RAM Subaru EA 81 in a Europa XS, I'm using your Z-19
>circuit as a general guide...a pal who is a marine electronics
>engineer/contractor had questions:
>
>1. Why is there a starter contactor in series w/ the starter
>solenoid? Could we not run from the starter 7 amp fuse to the
>push to start button direct to the sole coil?
Maybe not. What kind of pinion engagement system
is employed? A TWO stage, direct engagement or perhaps
an inertia-driven, Bendix style?
If the former, suggest you retain the exteral
starter contactor. See:
http://tinyurl.com/op5cs2g
>2. For weight & balance issues, my batteries will be aft in the
>tail cone; regarding location of main battery and engine battery
>contactors, if they were mounted on the firewall, could we not get
>by with only 3 AWG4 wires running back to the batteries by using a
>single wire as a common ground?
By legacy convention, battery contactors are
mounted as close as practical to their respective
batteries.
>My apologies for the personal email rather than a post on
>AeroElectric list-serve...for reasons unknown, I'm unable to post
>and have yet to sort out the problem...I am able to read the daily
>AeroElectric list-serve digest.
I see that you're currently subscribed to both the
digest and real-time dumps from the AeroElectric-List.
You can post a new message by sending to:
AeroElectric-List@matronics.com
Or simply reply to a message that was posted to
the list . . . even if you change the subject to
start a new thread.
Are you able to post to the other Matronics lists
to which you subscribe?
Bob . . .
Message 3
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| Subject: | Location of Batteries and Master Relays |
Bob,=0A-=0AI am planning on using the Z14 wiring for the FADEC electronic
ignition.- I am going to use two Odyssey PC680 batteries to be located u
nder the pilot/co-pilot seats.- There is plenty of room for upright insta
llation with ample room to also install the master relays, crossover relay,
and starter contactor and voltage regulators-as well.- I will also hav
e the wing leveler autopilot servo in the same area.- This is essentially
dead space that is not usable for storage.=0A-=0AThe question is do you
see any issues with having all the relays, contactors, and voltage regulato
rs located under the seats in the same area?- Past experience with batter
ies have proven keeping them inside greatly extends their life but not sure
if there are other issues I am not considering.- There is plenty of room
, lots more than behind the firewall and more accessible too.-=0A-=0A
-=0AThanks,=0A-=0ABob Reed
Message 4
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| Subject: | Re: Location of Batteries and Master Relays |
What type of aircraft?
Sent from my iPad
May you have the blessings of the Lord today.
On Sep 16, 2013, at 6:04 PM, Robert Reed <robertr237@att.net> wrote:
> Bob,
>
> I am planning on using the Z14 wiring for the FADEC electronic ignition. I
am going to use two Odyssey PC680 batteries to be located under the pilot/c
o-pilot seats. There is plenty of room for upright installation with ample r
oom to also install the master relays, crossover relay, and starter contacto
r and voltage regulators as well. I will also have the wing leveler autopil
ot servo in the same area. This is essentially dead space that is not usabl
e for storage.
>
> The question is do you see any issues with having all the relays, contacto
rs, and voltage regulators located under the seats in the same area? Past e
xperience with batteries have proven keeping them inside greatly extends the
ir life but not sure if there are other issues I am not considering. There i
s plenty of room, lots more than behind the firewall and more accessible too
.
>
>
> Thanks,
>
> Bob Reed
>
>
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>
Message 5
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| Subject: | Re: Electrical System Review |
The thread about "Why does a master switch..." prompted me to take a
look at my own electrical system.
I haven't been to the hangar to look at how my system is actually
wired, but in review of my schematic, (particularly, everything left
of the Main Bus)there were some glaring deficiencies re-wiring of
OVM's , and the Ground Power circuit, and perhaps the Battery Bus,
given the total load and the need for a switch/relay. And I was
surprised to see that, with engine running, the Main bus is always hot.
I would appreciate any comments to make this better.
Thanks,
John
I don't see any big gottchas except for current limiter in hte
starter/alternator feed line. We don't normally put circuit protection
there. The FARS don't require it and no certified single engine
airplane would have it. Further, starter current through this device
would blow it.
Does anyone else see a problem with John's proposed installation?
Oh, yeah . . . I presume that you included a contactor in the
aux alternator b-lead to make this feed line max-dark when
the switch is off . . . this suggests that tne contactor
be mounted adjacent to the battery contactor.
Bob . . .
Message 6
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| Subject: | Re: Electrical System Review |
Oops . . . didn't finish the job. The ANL60
needs to move as shown in attached.
Bob . . .
Message 7
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| Subject: | Re: Electrical System Review |
nuckolls.bob(at)aeroelect wrote:
> The thread about "Why does a master switch..." prompted me to take a
> look at my own electrical system.
> ...snip
> Thanks,
> John
>
>
>
>
> I don't see any big gottchas except for current limiter in hte
> starter/alternator feed line.
> ... snip
>
> Oh, yeah . . . I presume that you included a contactor in the
> aux alternator b-lead to make this feed line max-dark when
> the switch is off . . . this suggests that tne contactor
> be mounted adjacent to the battery contactor.
>
>
> Bob . . .
The current limiter is inaccurately drawn. It's actually in the B lead from the
main alternator just upstream from where the B lead connects to the Starter Contactor.
And there is a contactor for the Aux Alternator B lead just left of the Aux Alt
in the schematic. In reality, the contactor is about 4" from the Batt Cont.
Of concern is that I don't see any reverse polarity protection from the Ground
Power Jack. How would I achieve it with what I've got?
Also, from your quote Bob,
"battery bus feeders greater than 5A
might best be fitted with a disconnect relay at the
bus . . . not unlike Figure Z-32".
Is this just for shutting down in the event of a forced landing? I wired the batt
bus direct because I didn't want the always-on relay point of failure for
my #2 fuel pump and aux EFI power. The # 8 wire is about 7.5".
Per the LSE manual, both ignition leads sit on the Batt + terminal.
Thanks,
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=408707#408707
Message 8
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| Subject: | Re: Location of Batteries and Master Relays |
KIS Super Cruiser low wing fiberglass four place.
Bob Reed
Sent from my iPhone
On Sep 16, 2013, at 6:48 PM, Ron Burnett <ronburnett@charter.net> wrote:
> What type of aircraft?
>
>
> Sent from my iPad
> May you have the blessings of the Lord today.
>
> On Sep 16, 2013, at 6:04 PM, Robert Reed <robertr237@att.net> wrote:
>
>> Bob,
>>
>> I am planning on using the Z14 wiring for the FADEC electronic ignition.
I am going to use two Odyssey PC680 batteries to be located under the pilot
/co-pilot seats. There is plenty of room for upright installation with ampl
e room to also install the master relays, crossover relay, and starter conta
ctor and voltage regulators as well. I will also have the wing leveler auto
pilot servo in the same area. This is essentially dead space that is not us
able for storage.
>>
>> The question is do you see any issues with having all the relays, contact
ors, and voltage regulators located under the seats in the same area? Past e
xperience with batteries have proven keeping them inside greatly extends the
ir life but not sure if there are other issues I am not considering. There
is plenty of room, lots more than behind the firewall and more accessible t
oo.
>>
>>
>> Thanks,
>>
>> Bob Reed
>>
>>
>> =========================
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>> st">http://www.matronics.com/Navigator?AeroElectric-List
>> =========================
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>> cs.com
>> =========================
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>> matronics.com/contribution
>> =========================
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>>
>
>
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