I have customer that builds high-voltage lightning arrestors for
transmission and distribution lines. The use a wire insulated with silicon
insulated about 3/8" to 1/2" in diameter to handle voltages up to about
40Kv. They may not be too concerned about corona loss since their power
supply is about the size of a small refrigerator and has an input breaker
for 240V (480V?) of at least 30A.



~ Bob Ammerman
RAm Systems

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
> Of Jason White
> Sent: Thursday, April 02, 2015 8:22 PM
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE] Low corona HV wiring
>=20
> In a pinch, what I have done in the past is take a length of rather nice
silicone
> air line (1/8" inner diameter, 3/8" outer) use it to sheath existing low
voltage
> wires (short 10kV pulse). Perhaps I mearly got lucky, since most air line
(that I
> know of) isn't rated for this application. However, I suspect due to its
> thickness that it would capable of more when used in over top of an
existing
> high voltage rated wire.
>=20
> If you have no other alternative, I would look for something like that
either
> on ebay or at your local hardware store. I have had good luck on the
former.
>=20
> On Thu, Apr 2, 2015 at 7:32 PM, David VanHorn <microbrix@gmail.com>
> wrote:
> > I need suggestions for a small wiring job.  I'm running 50kV from a
> > VanDeGraff generator to a resistor and a spark gap.  I don't want to
> > take too much of a hit from corona losses, but I don't want to get too
> exotic.
> > The spark gap end needs to be removable, and I'll probably blue tape
> > the other end to the VDG sphere.
> >
> > I don't know what sort of commonly available wire might be suitable.
> > Spark plug wire?
> > 50 is a bit hot really for spark plug systems, the plug gap is much
> > smaller than that at least in cars.  50 will jump over an inch between
> > small spheres.
> >
> > The total length is less than three feet.
> >
> >
> > Ideas?
> > --
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>=20
>=20
>=20
> --
> Jason White
> --
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