Circuit breakers or fuses?

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skeeter_ca

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When i was at Copperstate i noticed several aircraft, all LSA's, using a fuse panel instead of circuit breakers. It sure is a cheaper way of doing it but is it just as good? I would not be wanting to look for a replacement fuse while flying, where as resetting a circuit breaker is easy.

Although i did see some fuses that have a neat little light inside to let you know if the fuse is good.

skeeter
 

Hot Wings

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Neither: Polyfuse

Resettable fuse - Wikipedia, the free encyclopedia

Looks like a good compromise between cost and function.

Jim Wier had a few articles in Kit Planes dealing with them. They aren't direct replacements for fuses or circuit breakers as they have their own set of "idiosyncrasies" that need to be taken into consideration.

I like the idea well enough to try them on my current project.
 

jhausch

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Dec 10, 2008
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Have you spent any time on Aeroelectric? That's a great place to lurk (on the Matronics lists) for electrical stuff.

Short answer - fuses blow faster and any single failure should still allow you to continue to a safe landing. Breakers are nice, but not a necessary component in a well designed system.
 
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