Today's Message Index:
----------------------
1. 08:20 AM - Re: Re: Interesting thread on overvoltage event (Paul Eckenroth)
2. 08:31 AM - Re: Circuit protection for backup alternator (Robert L. Nuckolls, III)
3. 08:44 AM - Re: Circuit protection for backup alternator (Ed Godfrey)
4. 08:45 AM - Re: Re: Interesting thread on overvoltage event (Werner Schneider)
5. 09:53 AM - Re: Re: Interesting thread on overvoltage event (Robert L. Nuckolls, III)
6. 10:39 AM - Trivia for the Day: Y2M Series Connectors (Robert L. Nuckolls, III)
7. 12:46 PM - Re: Trivia for the Day: Y2M Series Connectors (Jan de Jong)
8. 08:30 PM - Starter engaged warning light (Jeff Point)
9. 09:24 PM - Re: Starter engaged warning light (Tim Olson)
10. 10:50 PM - Re: Digital Industrial Scales Outlets (barbykerry)
Message 1
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| Subject: | Re: Interesting thread on overvoltage event |
Regarding the overvoltage event with an earthX battery. Apparently the
fried system did not have an overvoltage module installed. Would the B&C
overvoltage module have made this a non event?
Paul
On Mon, Apr 10, 2017 at 8:53 PM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 06:47 PM 4/10/2017, you wrote:
>
>
> Here is a link to the VAF thread that Charlie mentioned.
> http://www.vansairforce.com/community/showthread.php?p=1164359#post1164359
> It seems that the pilot was unable to shut down the alternator with either
> the field switch or master switch.
> Anyone who installs a Lithium battery should read the Dynon Support post
> #7 in that thread. Without aircraft electrical system over-voltage
> protection, a Lithium battery could disconnect itself from the electrical
> system to protect itself against an over-voltage event. Without a
> lead-acid battery to mitigate over-voltage, very expensive avionics are at
> the mercy of a runaway alternator.
> Post number 17 by Dynon Support is also interesting.
>
>
> The assertions made in this posting are largely
> correct. The stock internally regulated alternator
> has failure modes for ov conditions that cannot
> be controlled from the outside.
>
> With no battery on line to grunt the excess energy,
> bus voltages of 100-200 volts are easily realized.
> I had conversation with folks about this
> very topic last week . . . the event chronicled
> on the RV forum may have triggered the queries.
>
> The battery has always been a CRITICAL component
> of the overvoltage mitigation dynamic. The
> auto-disconnect feature in EarthX batteries is
> understandable from the battery safety
> perspective . . . but it may upset the apple cart
> when it fails to perform legacy duties expected
> of lead-acid batteries.
>
>
> Bob . . .
>
Message 2
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| Subject: | Re: Circuit protection for backup alternator |
At 08:33 PM 4/10/2017, you wrote:
>Bob,
> I am using the SB1B-14 regulator.
Okay . . . I'd recommend a Z-12 with
endurance bus. Much simpler in terms
of wire and not significantly less
robust.
Bob . . .
Message 3
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| Subject: | Re: Circuit protection for backup alternator |
Bob,
Thanks for the insight. I will review the Z12 ans see if I want to
make the changes. Also, thank you to those others who offered up advice.
Ed
On 4/11/2017 10:27 AM, Robert L. Nuckolls, III wrote:
> At 08:33 PM 4/10/2017, you wrote:
>> Bob,
>> I am using the SB1B-14 regulator.
>
> Okay . . . I'd recommend a Z-12 with
> endurance bus. Much simpler in terms
> of wire and not significantly less
> robust.
>
>
> Bob . . .
>
Message 4
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| Subject: | Re: Interesting thread on overvoltage event |
Paul,
the Alternator causing the issue was an internal regulated one, the B&C
OVM is for external regulated and yes it would tehre avoid such things.
Cheers Werner
On 11.04.2017 17:18, Paul Eckenroth wrote:
> Regarding the overvoltage event with an earthX battery. Apparently the
> fried system did not have an overvoltage module installed. Would the
> B&C overvoltage module have made this a non event?
>
> Paul
>
Message 5
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| Subject: | Re: Interesting thread on overvoltage event |
At 10:18 AM 4/11/2017, you wrote:
>Regarding the overvoltage event with an earthX
>battery.=C2 Apparently the fried system did not
>have an overvoltage module installed.=C2 Would
>the B&C overvoltage module have made this a non event?
Yes . . . sorta . . .
The B&C Crowbar OV module deliberately opens
the alternator's field supply breaker when
an ov event is detected.
The problem with STOCK automotive alternators
is difficulty of accessing the field supply
power path. The alternator must be disassembled
and modified for such service. This is what
B&C has routinely accomplished on all their
IR alternators since day-one.
Over the years, there have been numerous
articles in the OBAM aviation journals describing
techniques for modifying various brands of
IR alternator to external regulator service.
Early Plane Power products were modified to
to ADD the crowbar OV module right on the back
of the stock alternator housing . . . current
offerings have the module built in . . .
http://tinyurl.com/lnypyeq
Running an internally regulated
alternator with no ov protection is
a relatively low risk decision . . . but the
risk is NOT ZERO. Further, the stock alternators
do not permit the system integrator to offer
absolute on/off control of alternator output
by crew under all circumstances.
Bob . . .
Message 6
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| Subject: | Trivia for the Day: Y2M Series Connectors |
There's a relatively new kid on the block in
the community of robust connectors. I've
been seeing offers for several years but didn't
have time/inclination to explore them.
A few weeks ago, I ordered a Y2M-5TK, 5-pin
'military' connector for a hands-on, look-see . . .
Emacs!
This connector has lots of cousins offered all
over the 'net. An exemplar constellation of
offerings can be found here.
http://tinyurl.com/mt78ajg
The prices are VERY attractive. The quality is excellent.
The only down-side is that you need to hone your
soldering skills. I'd have no problem with using these
connectors in application on our airplanes.
Note: The backshell on the cable end has a fine LEFT
HAND THREAD. Further, you need to have the connector
halves mated thus securing the cable innards for
tightening the backshell. The fine thread is a
little fussy getting it started . . . easy to
cross thread.
Bob . . .
Message 7
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| Subject: | Re: Trivia for the Day: Y2M Series Connectors |
Bob, thank you for the report.
Jan de Jong
Message 8
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| Subject: | Starter engaged warning light |
Bob and fellow listers,
My starter solenoid (B&C) is not the type with a post for a starter
engaged warning light. It seems to me that I could simply run a wire
from the starter side of the solenoid to a warning lamp with no issues.
Once energized, the starter would draw it's large current and the lamp
it's very small current. Is it that simple of am I missing something?
Thanks
Jeff Point
Milwaukee
Message 9
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| Subject: | Re: Starter engaged warning light |
Hey Jeff,
I'm not 100% sure on this but I think I've seen a cutaway photo showing
that the
"I" terminal on the other type of solenoid is actually connected
internally to the same
basic spot as the big terminal is. So I would think it would work just
fine.
I can't think of any real reason not to do it, as long as the main
terminal is secure
and has enough exposed threads with an added ring terminal there, and I bet
it will fit fine. I did put the starter engaged light on my -14, but I
have the
regular Van's solenoid.
Mine is like the second one on page 6.
http://verticalpower.com/_documents/_pdf/contactor_wiring.pdf
I'm guessing that the reason they even added the terminal is for
simplicity in wiring those smaller wire ends to the solenoid without needing
a large ring terminal.
Tim
Up NorthWest of you
On 4/11/2017 10:27 PM, Jeff Point wrote:
>
> Bob and fellow listers,
>
> My starter solenoid (B&C) is not the type with a post for a starter
> engaged warning light. It seems to me that I could simply run a wire
> from the starter side of the solenoid to a warning lamp with no
> issues. Once energized, the starter would draw it's large current and
> the lamp it's very small current. Is it that simple of am I missing
> something?
>
> Thanks
>
> Jeff Point
> Milwaukee
Message 10
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| Subject: | Re: Digital Industrial Scales Outlets |
i always buy products from Amazon such as body weight scale
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=468321#468321
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