REFLECTOR:Alternator wiring
Hiroo Umeno
reflector@tvbf.org
Thu, 1 May 2003 10:22:37 -0700
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This makes sense. So, what I have it an automotive alternator. I think
I have a sense of what I need to do. I can install an idiot light on my
panel, and get an over-voltage protection. I think AS&S sells one.
=20
Thanks for the info.
=20
Hiroo
=20
-----Original Message-----
From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org] On
Behalf Of Laurence Coen
Sent: Thursday, May 01, 2003 10:07 AM
To: reflector@tvbf.org
Subject: Re: REFLECTOR:Alternator wiring
=20
Hiroo,
=20
The "S" connection is the "Sense" or field reference. When connected to
the buss it automatically compensates for any voltage drop in the
alternator power wire. The "L" is the "Light" connection and is for the
so called idiot light output. This configuration comes from the
automotive world. On an auto the + or "Bat" terminal is connected
directly to the battery and is not switched. When the ignition is
turned on , power is applied to the sense lead which causes the "idiot
light" to come on. When the engine starts and the alternator begins to
produce power the "idiot light" goes out. The primary reason that
aircraft have over voltage protection and cars don't is the master relay
or solenoid. On a car the battery provides over voltage protection
since it is always connected to the alternator. Airplanes can isolate
the battery by turning off the master with the engine still running and
the alternator still connected to the aircraft buss. Under these
conditions it is likely you will get an over voltage surge and maybe
smoke some expensive stuff on your panel if you don't have over voltage
protection.
I hope this is helpful and doesn't simply add to the confusion.
=20
Larry Coen
SE RG Franklin
----- Original Message -----=20
From: Hiroo Umeno <mailto:humeno@microsoft.com> =20
To: reflector@tvbf.org=20
Sent: Tuesday, April 29, 2003 3:19 PM
Subject: REFLECTOR:Alternator wiring
=20
Here I am, still doing wiring...
=20
My alternator I got from Franklin guys in CO got me scratching
my head. Many of the airplane wiring references refer to three major
connections to the alternator. Airframe GND, Alternator Field, and
Alternator Out.
=20
Now, as I look at my alternator, there appears to be four
connections. One is the GND which essentially is the casing bolted down
to the engine. Then there is a terminal that is marked with '+' symbol
that I figured is the OUT judging from the size of the bolt and nut on
the terminal. Now, on the side, there is a plastic connector that has
two, yes two, wires coming out. One is yellow and the other is green.
They are marked 'S' and 'L'. I am guessing one of them is the 'Field'
but which one?
=20
Has anyone got this figured out?
=20
Hiroo
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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>This makes sense. So, what I =
have it
an automotive alternator. I think I have a sense of what I need to
do. I can install an idiot light on my panel, and get an =
over-voltage
protection. I think AS&S sells one.</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Thanks for the =
info.</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Hiroo</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b> =
reflector-admin@tvbf.org
[mailto:reflector-admin@tvbf.org] <b><span style=3D'font-weight:bold'>On =
Behalf
Of </span></b>Laurence Coen<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, May 01, =
2003 10:07
AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> =
reflector@tvbf.org<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: =
REFLECTOR:Alternator
wiring</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Hiroo,</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>The "S" =
connection is the
"Sense" or field reference. When connected to the buss it
automatically compensates for any voltage drop in the alternator power
wire. The "L" is the "Light" connection and is =
for
the so called idiot light output. This configuration comes from =
the
automotive world. On an auto the + or "Bat" terminal is
connected directly to the battery and is not switched. When the =
ignition
is turned on , power is applied to the sense lead which causes the =
"idiot
light" to come on. When the engine starts and the alternator =
begins
to produce power the "idiot light" goes out. The primary =
reason
that aircraft have over voltage protection and cars don't is the master =
relay
or solenoid. On a car the battery provides over voltage protection =
since
it is always connected to the alternator. Airplanes can isolate =
the
battery by turning off the master with the engine still running and the
alternator still connected to the aircraft buss. Under these =
conditions
it is likely you will get an over voltage surge and maybe smoke some =
expensive
stuff on your panel if you don't have over voltage =
protection.</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>I hope this is helpful and =
doesn't
simply add to the confusion.</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Larry =
Coen</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>SE RG =
Franklin</span></font></p>
</div>
<blockquote style=3D'border:none;border-left:solid black =
1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'=
>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>----- Original Message =
----- </span></font></p>
</div>
<div style=3D'font-color:black'>
<p class=3DMsoNormal =
style=3D'margin-left:.5in;background:#E4E4E4'><b><font size=3D2
face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span=
></font></b><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> <a
href=3D"mailto:humeno@microsoft.com" =
title=3D"humeno@microsoft.com">Hiroo Umeno</a>
</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><b><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;font-weight:bold'>To:</span><=
/font></b><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> <a
href=3D"mailto:reflector@tvbf.org" =
title=3D"reflector@tvbf.org">reflector@tvbf.org</a>
</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><b><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;font-weight:bold'>Sent:</span=
></font></b><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> Tuesday,
April 29, 2003 3:19 PM</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><b><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;font-weight:bold'>Subject:</s=
pan></font></b><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>
REFLECTOR:Alternator wiring</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
</div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Here I am, still doing =
wiring…</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>My alternator I got from =
Franklin
guys in CO got me scratching my head. Many of the airplane wiring
references refer to three major connections to the alternator. =
Airframe
GND, Alternator Field, and Alternator Out.</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Now, as I look at my =
alternator,
there appears to be four connections. One is the GND which =
essentially is
the casing bolted down to the engine. Then there is a terminal =
that is
marked with ‘+’ symbol that I figured is the OUT judging =
from the
size of the bolt and nut on the terminal. Now, on the side, there =
is a
plastic connector that has two, yes two, wires coming out. One is =
yellow
and the other is green. They are marked ‘S’ and
‘L’. I am guessing one of them is the =
‘Field’ but
which one?</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Has anyone got this figured =
out?</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Hiroo</span></font></p>
</blockquote>
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=00
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