Today's Message Index:
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1. 03:19 AM - Re: ANL fuse 60 amp. (Robert L. Nuckolls, III)
2. 07:29 PM - Re: ANL fuse 60 amp. (Kelly McMullen)
Message 1
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| Subject: | Re: ANL fuse 60 amp. |
At 10:31 PM 5/29/2024, you wrote:
>B&C and SteinAir have them.
>
>Those things aren't really aircraft parts. They're more for
>car speakers and things like that. Not that they don't work
>fine. I have them in my airplanes too.
Not sure there is ANY catalog part, fuses and
limiters included, that you might call an
'aircraft' part. Catalog components become
suited to task for aviation 'cause
they appear on the drawings for a certified
airplane, military vehicle, spacecraft, etc.
The ANL/ANN series devices have been used aboard
aircraft for about 100 years . . . lots of them
scattered about B17's, KingAirs, LearJets and the
like. I introduced them to OBAM aviation a few
decades ago after an abortive decision to try
the JNN series fuses as bolt-on, in-line fuses
for b-lead protection.
http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Bussman/JNN_Specs.pdf
Bad idea, these critters didn't have the mechanical\
robustness needed for such service. Plan-B was
the ANL series devices and companion fuse-holders . . .
certainly ROBUST but rather huge for little
airplanes.
http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Bussman/ANL_Specs.pdf
http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Bussman/Limiter_FuseBlocks.pdf
Not too many years after that, the major players
in fusible protection (Bussman, Littlefuse, etc)
Brought out some hardened and more attractive
alternatives to the sheet-metal, limiters common
to some European cars. Those are illustrated on
the website as:
http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Littlefuse/498.pdf
http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Littlefuse/298.pdf
A visit to about any big automotive parts store
will provide sources for devices cited above
or very similar.
Holders for the modern devices are simple insulating
blocks drilled for fuse/wiring and attachment to the
airframe. I've made many of these things with a table
or band-saw and drill press. Phenolic, Delren, Lexan,
even kitchen cutting boards offer sufficiently
robust, non-conductive material for a base.
The car parts stores, amazon, ebay, et.als. will also
have manufactured holders.
http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Littlefuse/0498-MIDIFuseholder.pdf
But I usually build 'em when I need one.
You could also consider a fusible link. If it were
my airplane, a 6AWG b-lead protected by a 10AWG
fusible link would be an attractive up-grade from
bolt-on current limiters.
The nagging question is, Why did your original
limiter open up? Electrical fault or mechanical
aging? I think I'd jumper across your original
ANL mounting space with a hung of 12AWG wire
and fire up the engine to see how the alternator
is performing. Without seeing the wiring diagram
for your airplane, I'm guessing that the ANL was
for alternator b-lead protection?
Inquiring minds would like to know . . .
Bob . . .
////
(o o)
===========o00o=(_)=o00o========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
================================
In the interest of creative evolution
for the-best-we-know-how-to-do based
on physics and repeatable experiment.
Message 2
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| Subject: | Re: ANL fuse 60 amp. |
Bob,
I am procuring tomorrow the necessary pieces to test with a fusible
link, as I have not found what caused the fuse to blow.
It is 10 years old so age could have been a factor I didn't have the
pieces leftover from my build. I will test the system before installing
a new fuse.
Kelly
On 5/31/2024 3:19 AM, Robert L. Nuckolls, III wrote:
> The ANL/ANN series devices have been used aboard
> aircraft for about 100 years . . . lots of them
> scattered about B17's, KingAirs, LearJets and the
> like. I introduced them to OBAM aviation a few
> decades ago after an abortive decision to try
> the JNN series fuses as bolt-on, in-line fuses
> for b-lead protection.
> Plan-B was
> the ANL series devices and companion fuse-holders . . .
> certainly ROBUST but rather huge for little
> airplanes.
>
> http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Bussman/ANL_Specs.pdf
> <http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Bussman/ANL_Specs.pdf>
> http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Bussman/Limiter_FuseBlocks.pdf
>
> <http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Bussman/Limiter_FuseBlocks.pdf>
> A visit to about any big automotive parts store
> will provide sources for devices cited above
> or very similar.
>
> Holders for the modern devices are simple insulating
> blocks drilled for fuse/wiring and attachment to the
> airframe. I've made many of these things with a table
> or band-saw and drill press. Phenolic, Delren, Lexan,
> even kitchen cutting boards offer sufficiently
> robust, non-conductive material for a base.
>
> The car parts stores, amazon, ebay, et.als. will also
> have manufactured holders.
>
> http://aeroelectric.com/Mfgr_Data/Fuses_and_Current_Limiters/Littlefuse/0498-MIDIFuseholder.pdf
>
>
> But I usually build 'em when I need one.
>
> You could also consider a fusible link. If it were
> my airplane, a 6AWG b-lead protected by a 10AWG
> fusible link would be an attractive up-grade from
> bolt-on current limiters.
>
> The nagging question is, Why did your original
> limiter open up? Electrical fault or mechanical
> aging? I think I'd jumper across your original
> ANL mounting space with a hung of 12AWG wire
> and fire up the engine to see how the alternator
> is performing. Without seeing the wiring diagram
> for your airplane, I'm guessing that the ANL was
> for alternator b-lead protection?
>
> Inquiring minds would like to know . . .
>
> Bob . . .
>
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