Today's Message Index:
----------------------
1. 06:53 AM - Re: S700-2-10 master switch (Robert L. Nuckolls, III)
2. 10:32 AM - Re: Back when they were still carbon dust . . . (Paul Millner)
3. 01:27 PM - Re: S700-2-10 master switch (Sigma Eta Aero)
4. 01:40 PM - Re: Z13/8 all electric airplane (jonlaury)
5. 03:42 PM - Re: S700-2-10 master switch (Ben)
6. 04:06 PM - Re: Re: Z13/8 all electric airplane (Robert L. Nuckolls, III)
Message 1
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Subject: | Re: S700-2-10 master switch |
At 10:40 PM 5/17/2013, you wrote:
>I have an Aeroelectric recommended electrical system for a Rotax
>912S with a S700-2-10 master switch that has about 350 hours on
>it. I've recently been seeing the overvoltage protection light
>coming on periodically so today I went through the troubleshooting
>checklist for the Rotax alternator and regulator/rectifier. When I
>got to testing the master switch the OVP would kick on an off when
>the switch was pulled and wiggled so I'm pretty sure the switch is
>bad. Is that pretty common and should I be using another switch
>that's more robust? Or are there multiple manufacturers of this
>switch, some with better quality than others?
When you say the ov protection light comes
on, is this the light associated with the
alternator disconnect relay in the B&C
PM alternator control kit?
The 2-10 switching protocol is offered by
many manufacturers. If you purchased the 2-10
from B&C, then it's a Carling with riveted
fast-on tabs. It may be that one of these
joints is loose. I'd like to have your failed
switch for analysis.
I'm forwarding a copy of this to B&C. I think
they'd be happy to send you a new switch if
you send the old one to me. We'd like to know
what's going on. Will report finding to the
List.
Give Greg a call at 316-283-8000. Send the
switch to Box 130, Medicine Lodge, KS 67104
Bob . . .
Message 2
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Subject: | Re: Back when they were still carbon dust . . . |
Message 3
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Subject: | Re: S700-2-10 master switch |
Thanks Bob. -Yes, I have the disconnect relay kit.=0A=0AI'll get a hold o
f Greg and then send you the switch after I swap it.=0A=0AI must not have g
ood luck with switches, the first ACS key switch I had was bad right out of
the box. -The replacement they sent was just fine.=0A=0A-=0A=0A=0A____
____________________________=0A From: "Robert L. Nuckolls, III" <nuckolls.b
ob@aeroelectric.com>=0ATo: aeroelectric-list@matronics.com; Greg Jones <gre
g@bandc.biz> =0ASent: Saturday, May 18, 2013 6:51 AM=0ASubject: Re: AeroEle
ctric-List: S700-2-10 master switch=0A =0A=0A=0AAt 10:40 PM 5/17/2013, you
wrote:=0A=0AI have an Aeroelectric=0Arecommended electrical system for a Ro
tax 912S with a S700-2-10 master=0Aswitch that has about 350 hours on it.
- I've recently been seeing=0Athe overvoltage protection light coming on
periodically so today I went=0Athrough the troubleshooting checklist for th
e Rotax alternator and=0Aregulator/rectifier.- When I got to testing the
master switch the=0AOVP would kick on an off when the switch was pulled and
wiggled so I'm=0Apretty sure the switch is bad.-- Is that pretty commo
n and=0Ashould I be using another switch that's more robust?- Or are ther
e=0Amultiple manufacturers of this switch, some with better quality than=0A
others?- =0A- When you say the ov protection light comes=0A- on, is t
his the light associated with the=0A- alternator disconnect relay in the
B&C=0A- PM alternator control kit?=0A=0A- The 2-10 switching protocol i
s offered by=0A- many manufacturers. If you purchased the 2-10=0A- from
B&C, then it's a Carling with riveted=0A- fast-on tabs. It may be that o
ne of these=0A- joints is loose. I'd like to have your failed=0A- switc
h for analysis.=0A=0A- I'm forwarding a copy of this to B&C. I think=0A
- they'd be happy to send you a new switch if=0A- you send the old one
to me. We'd like to know=0A- what's going on. Will report finding to the
=0A- List.=0A=0A- Give Greg a call at 316-283-8000. Send the=0A- swit
ch to Box 130, Medicine Lodge, KS 67104=0A=0A=0A=0A- Bob . . .
Message 4
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Subject: | Re: Z13/8 all electric airplane |
@ Bob: "Either one" really?
I may be missing something here, but wouldn't " Line" indicate the battery and
"load" would indicate the Aux Alt field.
If "Line" is Batt Positve, connecting "Load" to ground will trip the breaker.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=400924#400924
Message 5
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Subject: | Re: S700-2-10 master switch |
Ben Haas
N801BH
www.haaspowerair.com
---------- Original Message ----------
From: Sigma Eta Aero <sigmatero@yahoo.com>
Subject: Re: AeroElectric-List: S700-2-10 master switch
I must not have good luck with switches, the first ACS key switch I had
was bad right out of the box. The replacement they sent was just fine.
Yuck................ So much for QC.... do not archive
____________________________________________________________
Transformation of America?
Stocks soar--but some wealthy citizens are preparing for huge changes
http://thirdpartyoffers.netzero.net/TGL3241/5198039a2826839a2854st01duc
Message 6
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Subject: | Re: Z13/8 all electric airplane |
At 03:39 PM 5/18/2013, you wrote:
>
>@ Bob: "Either one" really?
>
>I may be missing something here, but wouldn't " Line" indicate the
>battery and "load" would indicate the Aux Alt field.
>
>If "Line" is Batt Positve, connecting "Load" to ground will trip the breaker.
>
>
yep, here's a thread from 2008
Quote:
I am rewiring my Navion panel using busses with Potter-Brumfield W31
switch breakers and Klixon 7277 c/b's. I put the P-B buss bar on the
bottom following their Load-Line labeling but put the Klixon bar on top to
ease access to the load terminals. My IA neighbor (not my supervising IA)
tried to tell me it was backward but I had already checked and there is no
labeling on the Klixon c/b's. I see no intuitive reason it should care
about polarity but then I don't have a real understanding of their inner
workings. Did I miss something? Does polarity matter for the Klixons? If
so, I can change my buss. If not, why does P-B label their units (it's
also on their W23 c/b's?) Is it real or just a case of eliminating choice?
Thanks for the education.
BN: Intuitively, the physics of a series-connected
heat-tripped, switch do not suggest a reason why
the breaker would care which way electrons flow
through it . . . and in particular, AC system
breakers where electrons are known to turn around
and run the other direction 120 times a second!
You've already had some good responses but I'll
take this opportunity to elaborate. Not all
breakers are rudimentary . . . i.e. a simple
spring-loaded, heater-tripped latch holding a
set of single or double-break contacts closed.
Breakers can be had with auxiliary switches,
indicator lights, voltage sense coils, and
all manner of enhancements where proper function
of the enhancement depends on a connection to
power being available even when the breaker is
open. Obviously, some third terminal is necessary
for an enhancement to function, this is sometimes
an obvious connection, or perhaps it gets hooked
up through the mounting.
In any case, it's not uncommon for a manufacturer
to use common tooling to mold a breaker housing
for all versions, hence you often see the word
"load", "line" or both formed right next to the
breaker's terminals . . .
I've asked several tech reps for breakers and
except for enhanced breakers, orientation in
the system doesn't matter. Interestingly enough,
if an electrician encounters "line" and/or "load"
labels on a breaker, he'll wire it up that way
whether it matters or not. And I suspect many
aviation techs do too . . . not because the
physics matters but because some inspector who
doesn't know any better can be counted on to
insist that the protocols be followed.
The only time I've encountered this as a
"problem" is when a builder finds it convenient
to fabricate a two-row bus-bar and take load
feeders off opposite ends of the breaker. When
they come stamped with a breaker rating,
they look pretty funky with one row upside-down
in their holes!
Bob . . .
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