Re: High Voltage but Low Current fuses...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

Why not use thin aluminum wire... much lower melting point, much faster
transition from solid to liquid (as anyone who as attempted to weld Al can
attest)
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, July 15, 2003 6:29 PM
Subject: Re: High Voltage but Low Current fuses...


 > Original poster: "Mark Broker by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<mbroker-at-thegeekgroup-dot-org>
 >
 > Excellent idea, Antonio!  I believe that some mid-high voltage fuses (say
 > 13.8kV) have a stiff spring at one end to pull the gap apart.  I would
 > think that would work here, too, only with pen springs or similar.  But
 > that's probably more complex than a simple weight.  The weight mustn't be
 > too large or it could promote a premature failure over time - copper
creeps
 > when hot.
 >
 > Regards,
 >
 > Mark Broker
 > Chief Engineer, The Geek Group
 >
 > On Mon, 14 Jul 2003 21:02:37 -0600, Tesla list <tesla-at-pupman-dot-com> wrote:
 >
 > >Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz
 > ><teslalist-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>
 > >
 > >Tesla list wrote:
 > > >
 > > > Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
 > >
 > > > 1.  ~30000 V withstand and break.
 > > >
 > > > 2.  About 250mA of fuse current, but NOT at all critical.  The current
is
 > > > either 100 mA (normal) or 500 amps (Yipps!!  turn it
 > > > off!!)  ;-))  Basically a far "much less than 1 amp" but very high
voltage
 > > > fuse...
 > >
 > > > Any ideas are welcome.  Both of my little projects seem to need darn
good
 > > > high voltage fuses...  The fuses themselves might become the third
project
 > > > ;-))
 > >
 > >Maybe this, that is easy to assemble:
 > >A vertical fuse made with thin wire, with the upper end secured at a
 > >fixed support, and the lower end connected to a flexible wire and a
 > >weight that can fall if the fuse opens.
 > >
 > >Antonio Carlos M. de Queiroz
 > >
 >
 >
 >
 >
 >
 >