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Message
John, I don't follow the aero-electric list, but I did look
around for the posts you mentioned. I didn't see them right off, and I
can't really imagine sizing a fuse smaller than the alternator output
rating. If you can find those posts in the archive, tell me what the
subject line was, and I'll take a look.
I had it the wrong way around. Bob
Nuckolls said:
The JJS/JJN series fuses are very
fast acting and were
deliberately oversized for alternator b-lead
applications
to prevent nuisance tripping. An JJS/JJN-80 fuse
is
fine for alternators from 35 to 60A.
Given low cost
availability of the ANL series limiters
and in light of their VERY
robust overcurrent carrying
behavior, you'll want to size the limiter
closer to the
rated output of the alternator. ANL limiters are
available
in a variety of sizes which you can check out by
downloading this data sheet.
http://www.bussmann.com/library/bifs/2024.pdf
Note these devices are designed to clear HARD
faults
in the hundreds of amperes . . . exactly the type of
fault to be expected in the alternator b-lead
circuit.
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