[Amps] HV fuse

[R.Measures]

•  The trouble with high voltage fuses is that the metal vapor  arc 
which forms as the fusing wire melts has only c. 30v drop.  However, a 
low-ESR 3000v filter C can still do plenty of damage at 2970v, so a 
foolproof means of limiting I-peak is needed.  In other words, the 
device that the HV fuse is supposed to be protecting from a current 
spike is not protected for a finite period of time, and damage may 
result.
-  A better solution is to limit I-peak with a suitable HV glitch R and 
use circuit breakers, or 250v fuses, in the primaries of the PS 
transformers.
cheerz, Lane

On Jul 12, 2004, at 5:11 PM, Lane Zeitler wrote:

> Gents,
> Anyone remember what wire size to use for a HV fuse??? Looking for 
> something that will pop at around 2 amps.
>
> Lane
> Ku7i
>
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org