[Milsurplus] BC-375 HV fuses needed

[Richard Brunner]

Maybe the pico-fuse vaporizes and the ensuing arc is snuffed out by the
surrounding borax.  DC arcs are hard to stop.  Generally you have to
extend and cool it until it is too cool to sustain the plasma.  AC arcs
are easy. (well, easier)

Richard


On Tue, 2011-09-13 at 15:10 -0400, WA5CAB at cs.com wrote:
> I'm interested, too.  If it works reliably it may be a general solution.
> 
> However, I need to point out that in a fuse, it isn't the air gap that the 
> arc is propagating through.  But ionized metal vapor, a plasma.
> 
> In a message dated 09/13/2011 13:59:51 PM Central Daylight Time, 
> brunneraa1p at comcast.net writes: 
> > Theory says it won't work, but I will not argue against success.  Maybe
> > you have devised a new combination HV fuse!  Do let us know what
> > happened.
> > 
> > Richard
> > 
> > 
> > On Mon, 2011-09-12 at 20:23 -0500, David Stinson wrote:
> > >----- Original Message ----- 
> > >From: "Richard Brunner" <brunneraa1p at comcast.net>
> > >Subject: Re: [Milsurplus] BC-375 HV fuses needed
> > >
> > >
> > >>A 120 volt fuse isn't going to interrupt a high voltage circuit, but 
> > >>it
> > >>will continue to arc, introducing voltage drop to the circuit fault 
> > >>and
> > >>maybe limit damage...
> > >
> > >Hmmm.... I've had one of them open on mine already
> > >while testing 211s.
> > >It didn't arc.  It worked just like it was supposed to.
> > >I haven't tried to replace the picofuse yet so don't know if
> > >it blew to pieces or what.  I'll see if I can find it.
> > >1000 volts in air won't sustain an arc over very much distance.
> > >And the leads on a picofuse would melt-off quickly.
> > 
> 
> Robert & Susan Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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