Re: Z-Machine Sparkage - Substation Fault

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

Original poster: "David Sharpe by way of Terry Fritz <teslalist-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Jim

Check Bussman (google), also this link.

  http://www.bussmann.co.uk/New%20HV/High%20voltage%20fuse%20technology.pdf

They mention the use of "explosive charges" for fuse operation (>1kVAC/DC)

Regards
Dave Sharpe, TCBOR
Chesterfield, VA. USA



Tesla list wrote:

 > Original poster: "Jim Lux by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
<jimlux-at-earthlink-dot-net>
 >
 > I hadn't heard of actual explosives or propellants being used in fuses.
 > Could you give a mfr and model number?  This is fascinating..
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Sunday, April 13, 2003 10:33 AM
 > Subject: Re: Z-Machine Sparkage - Substation Fault
 >
 >  > Original poster: "David Sharpe by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>
 >  >
 >  > Godfrey
 >  >
 >  > Several HV fuse manufacturer's in fact use explosive charges in fuse
 > cartridge
 >  > to separate/isolate current carrying elements in an over current event.
 > The
 >  > violent explosion of the fuse when the transformer was flaming suggests
 > that
 >  > the primary side fault current was very high (certainly > 1kA).
 >  >
 >  > Regards
 >  > Dave Sharpe, TCBOR
 >  > Chesterfield, VA. USA
 >  >
 >  > Tesla list wrote:
 >  >
 >  >  > Original poster: "Godfrey Loudner by way of Terry Fritz
 >  > <teslalist-at-qwest-dot-net>" <ggreen-at-gwtc-dot-net>
 >  >  >
 >  >  > Do these expulsion fuses have high explosive charges inside to 
blow out
 >  >  > arcs? Was that loud humming sound made by bussing transformer
 > laminations?
 >  >  >
 >  >  > Godfrey Loudner
 >  >  >
 >  >  >  >I'm going to show at an electrical
 >  >  >  > safety training class at work, just to illustrate how bad a >high
 > power
 >  >  > fault
 >  >
 >  >