[Amps] HV fuse

[R.Measures]

On Jul 20, 2004, at 12:22 AM, Traian wrote:

> Hi Rich,
>
> I think I wrote it wrong. The fuse was not actually destroyed 
> (exploded)
> but interrupted, so it did its job. It is quite big, seems to be made 
> from
> glassfibre+epoxy compound, hard to be destroyed.

> It was the second time when it happened (first was because of a
> cracked doorknob cap).
> It was "repaired" before using a proper sized thin copper wire as a new
> one it was impossible to find here. Even so, it still did its job.
> As usual for such mistake, I did learn something new, and now was
> about the HV fuses. What is interresting about that HV fuse
> (labeled Buss) is that its inside is splitted in two large compartments
> separated by a little wall with small hole in it (the wire is getting
> through).
> Later I found new 3 kV 1 amp glass HV fuses made in the former east
> Germany and they have also their interior splitted but this time in 
> three
> separate compartments of different size.
> Is this the "secret" of the HV fuse, can this  to be done as to 
> prevent the
> vapor arc?

HV fuses normally contain silica sand to quench the metal vapor arc.  I 
don't know if compartmentalization would accomplish the same thing.  
cheerz, Trajan
Richard L. Measures, AG6K, 805.386.3734.  www.somis.org