Today's Message Index:
----------------------
1. 07:07 AM - Re: SD-8 Alternator Question (Airdog77)
2. 04:30 PM - Re: Re: SD-8 Alternator Question (Robert L. Nuckolls, III)
3. 06:08 PM - Re: SD-8 Alternator Question (Airdog77)
4. 08:07 PM - Re: Re: SD-8 Alternator Question (Ron Springer)
Message 1
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| Subject: | Re: SD-8 Alternator Question |
Bob,
I believe you're referring to the fuse on the main connection to the battery contactor
from the S704-1 relay?
And Stu is referring to the SD-8 connection to the power bus, not the inline fuse
depicted on one of the two alternator leads shown on the B&C diagram.
I too have questions on whether this 15A fuse should be included, but figured since
Bob depicts it twice without it --both in the Z-13/8 and Z-25 diagrams that
include a bridge rectifier (that B&C doesn't) for self excitation-- then it
wasn't required.
Bob, can you confirm whether the 15A fuse at the actual SD-8 alternator feed is
required or not if the self excitation feature is employed?
Regards,
Wade
--------
Airdog
Wade Parton
Building Long-EZ N916WP
www.longezpush.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=477529#477529
Message 2
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| Subject: | Re: SD-8 Alternator Question |
At 09:06 AM 1/24/2018, you wrote:
>
>Bob,
>
>I believe you're referring to the fuse on the main connection to the
>battery contactor from the S704-1 relay?
>
>And Stu is referring to the SD-8 connection to the power bus, not
>the inline fuse depicted on one of the two alternator leads shown on
>the B&C diagram.
>
>I too have questions on whether this 15A fuse should be included,
>but figured since Bob depicts it twice without it --both in the
>Z-13/8 and Z-25 diagrams that include a bridge rectifier (that B&C
>doesn't) for self excitation-- then it wasn't required.
>
>Bob, can you confirm whether the 15A fuse at the actual SD-8
>alternator feed is required or not if the self excitation feature is employed?
Good eye! I'd forgotten about that fuse being
added some years ago. It's a good idea. One of
the failure modes for the rectifier/regulator
places a dead short on the SD-8 output. The fuse
keeps the dynamo from smoking. The RMS current
flowing out of the dynamo is about the same as
the DC output current from the rectifier/regulator.
This is a duty-cycle switched series regulator
with no energy-storage . . .
Bob . . .
Message 3
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| Subject: | Re: SD-8 Alternator Question |
Bob,
Thanks for confirming that fuse should be installed. I literally just bolted my
SD-8 to the vacuum pad during my engine build yesterday, so now I'll plan on
adding back in that inline fuse.
Ron- Thanks for asking the question.... perfect timing!
Regards,
Wade
--------
Airdog
Wade Parton
Building Long-EZ N916WP
www.longezpush.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=477557#477557
Message 4
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| Subject: | Re: SD-8 Alternator Question |
No problem. Thanks Bob!
Ron
On Wed, Jan 24, 2018 at 9:06 PM, Airdog77 <Airdog77@gmail.com> wrote:
>
> Bob,
>
> Thanks for confirming that fuse should be installed. I literally just
> bolted my SD-8 to the vacuum pad during my engine build yesterday, so now
> I'll plan on adding back in that inline fuse.
>
> Ron- Thanks for asking the question.... perfect timing!
>
> Regards,
> Wade
>
> --------
> Airdog
> Wade Parton
> Building Long-EZ N916WP
> www.longezpush.com
>
>
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