Check with a fuse supplier. For MV current-limiting fuses, the answer is definitely no, they have to be applied within a specific voltage range. For expulsion fuses like fuse links in cutouts, I suspect it may be OK, but I wouldn't take my word on it. Never seen it done.
It might work most of the time but a CLF needs a certain amount of available energy to fulfill its current-limiting (arc-quenching) capability. So the published interrupting rating only applies within the specified application voltage range.
I'm really struggling to understand what you are trying to accomplish. Low voltage fuses are pretty cheap. But whatever floats your boat.
In the UK - which has a generally damp climate - our LV O/H service drops are usually protected by a fused cut-out, essentially a ruggedised and weather-proof fuseholder. We don't have a large problem with people at ground level interfering with them. They're too busy stealing the earthing grids...
As Scotty says, these outdoor pole mounted low voltage fuses are in widespread use in the UK. Pretty much every pole mounted transformer substation has them, but they are also used as switchable open points on the distribution system. You can get heads to fit standard hot sticks to operate them, but it is fiddly from ground level. Taking them out is easy, putting them back in is sometimes a pain if they are mounted anything more than about 3or 4m up. The fuseholder is rated for 400A max.
@Marmite: That's exactly what I need, and trying to accomplish. The only hold back being those are difficult to obtain in the US. Only off the shelf solution is a HV cutout.
Out of curiosity, what is the theory behind fusing overhead LV in the UK?
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