Re: gapped mot

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

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

Current transformers ARE used on HV systems all the time.  I have a whole
pile of them in various configurations, and yes, all you do is run the HV
wire through the hole, and you're all set.

For those interested in DC, for about $25, you can get nifty little Hall
effect sensors that work very nicely...

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, January 05, 2002 6:54 PM
Subject: Re: gapped mot


> Original poster: "Matthew Smith by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <matt-at-kbc-dot-net.au>
>
> Hi All
>
> Stop me if I'm on the wrong track, but if isolation is the key, how
> about *total* electrical isolation?  CTs (current transformers) are
> non-intrusive, whether you use a standard clamp ammeter or just pass the
> output lead through an RF choke ring with a few turns of insulated wire
> around it, going to some measuring equimpent of your own devising...
>
> Is there any reason why this couldn't be used on an HV system?
>
> Cheers
>
> Matthew Smith
>
> Tesla list wrote:
> >
> > Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <jimlux-at-earthlink-dot-net>
> >
> > A regular ammeter with a bridge rectifier around it would probably also
> > work.  As Ted points out, isolated is the key...
> >
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Saturday, January 05, 2002 12:02 PM
> > Subject: Re: gapped mot
> >
> > > Original poster: "tesla by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <tesla-at-paradise-dot-net.nz>
> > >
> > > Ted in NZ here
> > > To measure MOT secondary current an isolated (ie insulated from other
> > > objects) moving iron ampmeter would do the trick. These can be had at
many
> > > electronics stores. Must be moving Iron and a FSD around 2 Amps would
be
> > > about right I think.
> > >
> > > Gapping a mot is an intersting idea, not tried I'll be very interested
in
> > > any feedback. Would imagine it would lower the primary inductance a
lot
> > and
> > > no load I/P current could be high.
> > > RgdsTed in NZ
> > > ----- Original Message -----
> > > From: Tesla list <tesla-at-pupman-dot-com>
> > > To: <tesla-at-pupman-dot-com>
> > > Sent: Sunday, January 06, 2002 4:21 AM
> > > Subject: gapped mot
> > >
> > >
> > > > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > > <PsychoticMinds1-at-aol-dot-com>
> > > >
> > > > Hi all
> > > >
> > > >              I have a question what would happen if i was to air gap
a
> > mot
> > > and
> > > > run it like i would a normal mot as my power supply?  And does
anyone
> > know
> > > a
> > > > safe way to messure the amperage on the hv side of a mot?
> > > >
> > > >
> > > >
> > >
> > >
> > >
>
> --
> Matthew Smith
> KBC, PO Box 150, Kadina, 5554, S. Australia
> Ph: (08) 88 212 395  Fx: (08) 82 190 157
> http://kbc-dot-net.au
>
>
>