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Re: Danger, and I don't understand why.



Tesla List wrote:

> Original Poster: "Dr. Steinkamp" <steinkamp-at-iee.uni-hannover.de>
>
> -----Ursprüngliche Nachricht-----
> Von: Tesla List <tesla-at-pupman-dot-com>
> An: <tesla-at-pupman-dot-com>
> Gesendet: Donnerstag, 19. August 1999 00:49
> Betreff: Re: Danger, and I don't understand why.
>
> > Original Poster: "Robert Jones" <alwynj48-at-earthlink-dot-net>
> >
> > Hi all,
> >
> > The energy may be even higher.  If the primary is disconnected at the peak
> > of the input current the energy stored in the magnetisation flux (not the
> > current or windings) of the primary may get transferred to the secondary
> and
> > may add to its stored energy.
> >
> > Presumably this will happen even on a shorted pole pig which I assume has
> > little shunt inductance.  The time constant is an increasing function of
> the
> > core and copper volume so in general the time constant will be longer for
> a
> > larger transformer.  Also the maximum stored energy is proportional to the
> > core volume so that will be greater for a larger transformer.  So be
> careful
> > with those big pole pigs.
> >
> > -----Original Message-----
> > From: Tesla List <tesla-at-pupman-dot-com>
> > To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
> > Date: 16 August 1999 09:51
> > Subject: Re: Danger, and I don't understand why.
> >
> >
> > >Original Poster: Michael Tucknott <Michael.Tucknott-at-virgin-dot-net>
> > >
> > >Hi Terry & all
> > >
> > >Big snip ola--
> > >>
> > >> Also consider the energy stored in the transformer.  If it is a 60mA
> > >> transformer and you happen to catch it at the peak current of 85mA.
> Then
> > >> the energy stored per leg is 0.5 x L x I^2.  It this case, 0.5 x 3711 x
> > >> .085^2 = 13.4 joules!!  Given both legs, the neon can store almost six
> > >> times the energy the primary cap can!  So the neon by not only be able
> to
> > >> shock you but easily kill you too!!!  Dangerous indeed....
> > >>
> > >> Cheers,
> > >>
> > >>         Terry
> > >
> > >If this true for NST`s and OBIT`S would the same occur with the
> > >more powerfull pole pig or PT.
> > >
> > >Also if you are using MOT`s to limit your pig could thay retain
> > >a residual charge on there windings.
> > >
> > >Thanks to all for making Tesla coiling a safer hobby.
> > >
> > >Mike Tucknott
> > >*********************************************************************
> > >If at first you don`t succeed......
> > >
> > >It must be someone else`s fault so
> > >Find them; Blame them; Make them pay
> > >
> > >http://freespace.virgin-dot-net/michael.tucknott/tesla.html
> > >*********************************************************************
> > >
> > >hi there all,
>
> I'm a newcomer in teslacolisproblems. I need information:
>
> what is a copper magnetic wire?
> is it a wire with magnetic effecience without a current like a permanent
> magnet? I can't believe that.
>
> regards
>
> stone
> > >
> >
> >

  its a type of wire ....    normally used to wind solinoids (sp.?) for
electromagnets
it is a single strand wire with a shellac or varnish style of insulation...
sold
by the pound (sometimes it is found in multiple lb spools)   this stuff is
available in thicknesses from 12gage ( pencil lead thick )  to 40gage (less
than
a human hair thick) ... the common gage used for coiling is 22 gage for low to
medium powered coils. If you are just experimenting, use the inexpensive
stuff    but if you are planning to build for heavy usage try to find " Double
Formvar" wire.  ( it has been double dipped in the insulation e.g. 2 coats of
varnish).


Scot D