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Fuses versus Breakers
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March 10th 05, 08:28 PM
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Generally, you size a breaker several times the normal operating
current. So if your vario draws 0.1A a 0.5A breaker would be a good
choice. The voltage drop is proportional to current, so at 0.1A it
will be less than 0.4V. This should be of no consequence to your
vario. A fuse will have a lower voltage drop, but isn't resetable.
No, you should size a fuse acording to the WIRE! So if you wire is
rated for 5A, then fit a 5A fuse. Be sure to check inrush current
and fit a `slo blo' if needed.
While a fuse is highly reliable, it isn't perfect. And you can be
assured that if it does fail it will be at the worst possible
moment.
The best way I know of to increase fuse reliability is to replace
them every few years. Or it is for 3AG or the like.
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West Australia 6076
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