Which material has the highest-breakdown voltage and ohms?

R

Radium

Guest
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?


Thanks,

Radium
 
Radium wrote:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?
Click to expand...
You probably mean highest dielectric strength.

"PBN exhibits extremely high electrical resistivity (yet is uniquely
combined with good directional thermal conductivity) and the highest
dielectric strength of any commercially available material."

Dielectric Strength of 200kV per mm

Can this material block the flow of lightning's megavolts?
Click to expand...
You bet.

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?
Not necessarily

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?
Click to expand...
Not necessarily.

--
Sue
 
Ink on paper.

9^999999999999999999999999999999999999999999999999999999999999999999999999
ohms but only

9^999999999999999999999999999999999999999999999999999999999999999999999998
volts.
 
Possibly you should learn something about high voltage and breakdown. After
you have learned the basics, then come back with (possibly) more intelligent
questions.

--

Don Kelly dhky@shawcross.ca
remove the X to answer
----------------------------
"Radium" <glucegen1@gmail.com> wrote in message
news:1179353482.746968.256310@k79g2000hse.googlegroups.com...
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?


Thanks,

Radium
Click to expand...
 
On 5/16/07 7:08 PM, in article 6OO2i.189635$6m4.2426@pd7urf1no, "Don Kelly"
<dhky@shaw.ca> wrote:

Possibly you should learn something about high voltage and breakdown. After
you have learned the basics, then come back with (possibly) more intelligent
questions.

--

Don Kelly dhky@shawcross.ca
remove the X to answer
----------------------------
"Radium" <glucegen1@gmail.com> wrote in message
news:1179353482.746968.256310@k79g2000hse.googlegroups.com...
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?


Thanks,

Radium



Don,
Click to expand...

You are missing the point. This Ra guy is just trying to infuriate us, and
he is succeeding.
-- Fermez le Bush--about two years to go.
 
On May 16, 3:11 pm, Radium <gluceg...@gmail.com> wrote:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Thanks,

Radium
Click to expand...
Why don't you do some research?
 
On May 16, 3:27 pm, Palindrome <m...@privacy.net> wrote:

Radium wrote:

Hi:


Which material has the highest breakdown voltage and electrical
resistance?

You probably mean highest dielectric strength.

"PBN exhibits extremely high electrical resistivity (yet is uniquely
combined with good directional thermal conductivity) and the highest
dielectric strength of any commercially available material."

Dielectric Strength of 200kV per mm
Click to expand...
Okay.


Can this material block the flow of lightning's megavolts?

You bet.
Click to expand...
Are you sure? You're saying that PBN has enough dielectric strength to
block out lightning? PBN can block millions of volts? Sounds too good
to be true.


Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

Not necessarily
Click to expand...
Okay.

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Not necessarily.
Click to expand...
How do ohms and dielectric strength relate? Is their an equation?
 
Radium wrote:

How do ohms and dielectric strength relate? Is their an equation?
Click to expand...
.....EASY :-

Reading + study + time - smoking dope = knowledge. This knowledge
then qualifies one to ask relevant questions

Someone suggested "crawl before you run", this is sage advice.
 
On 16 May 2007 21:49:19 -0700, Eric Gisse <jowr.pi@gmail.com> wrote:

On May 16, 3:11 pm, Radium <gluceg...@gmail.com> wrote:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Thanks,

Radium

Why don't you do some research?
Click to expand...
Practically speaking... Blocking lightning with an insulator is
difficult, if not impossible. The charge levels can be on the order
of billions of volts and the lightning is going to go somewhere.

Therefore, most, if not all, lightning protection schemes use
conductors, cages, cables, wires, sheet metal and attempt to safely
discharge the current into the ground and divert it from what you want
to protect.

Example, let's say you are driving a car through a thunderstorm.
You're going to generally be safer inside a car with a metal top, than
in a convertable with a non-conductive top, no matter how good an
insulator the roof of the car is made of.

Another example - Skyscrapers in storm areas can get struck hundreds
of times per year, yet the people who work or live in them are much
safer than people just walking around outside. You are generally
going to be surrounded by a conductive steel enclosure and be in
perfect safety.
 
On May 17, 8:11 am, Radium <gluceg...@gmail.com> wrote:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Thanks,

Radium
Click to expand...
You need to talk in terms of Dielectric Strength.
http://en.wikipedia.org/wiki/Dielectric_strength

Ceramics are one of the highest, they are used as the insulators on HV
power lines.

Look at a power pole and take note of the shape of the ceramic
insulators, they are this shape because the air around the insulator
will break down before the insulator will.

Dave.
 
In alt.engineering.electrical Radium <glucegen1@gmail.com> wrote:

| Are you sure? You're saying that PBN has enough dielectric strength to
| block out lightning? PBN can block millions of volts? Sounds too good
| to be true.

At 200kV/mm a few meters thickness of this stuff should work for you.
The catch is that if the lightning strike does happen, even though the
electrical voltage won't go through, the heat emitted from the arc
could damage the material and the next strike will getcha!

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / spamtrap-2007-05-17-0740@ipal.net |
|------------------------------------/-------------------------------------|
 
Radium wrote:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?
Click to expand...
Shitanium Illudium Phosdexate prepared as an incommensruate modulated
crystal lattice has a normalized specific dearcation index of
1.61803. That is the highest normalized specific index there is - by
almost 62% relative.


--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2
 
On May 16, 5:11 pm, Radium <gluceg...@gmail.com> wrote:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Thanks,

Radium
Click to expand...
It's easier to block lightning with a *conductor* than with a
dielectric shield. Google "Faraday cage" and "lightning rod".

Also note that lightning has no real need to travel in a straight line
from A to B. It will usually take the path of least resistance, which
might be somewhat straight, as long as there isn't a sheet of
dielectric in the way. But if there is a path *around* the dielectric
sheet that is lower resistance, then it will certainly take that
route.

Finally, note that people have been electrocuted standing 100 ft or
more away from the tree that lightning struck, as the current
*continued* traveling through the ground.

PD
 
I'm not infuriated. It is really quite asinine so one doesn't know whether
to laugh or cry.

Thanks
--

Don Kelly dhky@shawcross.ca
remove the X to answer
----------------------------
"Salmon Egg" <salmonegg@sbcglobal.net> wrote in message
news:C271256F.783A3%salmonegg@sbcglobal.net...
On 5/16/07 7:08 PM, in article 6OO2i.189635$6m4.2426@pd7urf1no, "Don
Kelly"
dhky@shaw.ca> wrote:

Possibly you should learn something about high voltage and breakdown.
After
you have learned the basics, then come back with (possibly) more
intelligent
questions.

--

Don Kelly dhky@shawcross.ca
remove the X to answer
----------------------------
"Radium" <glucegen1@gmail.com> wrote in message
news:1179353482.746968.256310@k79g2000hse.googlegroups.com...
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?


Thanks,

Radium



Don,

You are missing the point. This Ra guy is just trying to infuriate us, and
he is succeeding.
-- Fermez le Bush--about two years to go.
Click to expand...
 
"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
news:464C6550.E8B2BF40@hate.spam.net...
Radium wrote:

Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Shitanium Illudium Phosdexate prepared as an incommensruate modulated
crystal lattice has a normalized specific dearcation index of
1.61803. That is the highest normalized specific index there is - by
almost 62% relative.


--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2
Click to expand...
ROFL - the best answer I've read yet. :)
 
On Thu, 17 May 2007 07:23:12 -0700, Uncle Al <UncleAl0@hate.spam.net> wrote:

Radium wrote:

Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Shitanium Illudium Phosdexate prepared as an incommensruate modulated
crystal lattice has a normalized specific dearcation index of
1.61803. That is the highest normalized specific index there is - by
almost 62% relative.
Click to expand...
What, the shaving cream atom?
 
In sci.physics.relativity, Uncle Al
<UncleAl0@hate.spam.net>
wrote
on Thu, 17 May 2007 07:23:12 -0700
<464C6550.E8B2BF40@hate.spam.net>:
Radium wrote:

Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?

Shitanium Illudium Phosdexate prepared as an incommensruate modulated
crystal lattice has a normalized specific dearcation index of
1.61803. That is the highest normalized specific index there is - by
almost 62% relative.
Click to expand...
And it can be used to blow up the Earth, in case it obstructs anyone's
view of Venus.

:)

--
#191, ewill3@earthlink.net
"Your mother was a hamster and your father smelt of
elderberries!" - Monty Python and the Holy Grail

--
Posted via a free Usenet account from http://www.teranews.com
 
<phil-news-nospam@ipal.net> wrote in message
news:f2hiih317cp@news4.newsguy.com...
In alt.engineering.electrical Radium <glucegen1@gmail.com> wrote:

| Are you sure? You're saying that PBN has enough dielectric strength to
| block out lightning? PBN can block millions of volts? Sounds too good
| to be true.

At 200kV/mm a few meters thickness of this stuff should work for you.
The catch is that if the lightning strike does happen, even though the
electrical voltage won't go through, the heat emitted from the arc
could damage the material and the next strike will getcha!
Click to expand...
And depending on the geometry, you can get surface tracks along the surface,
around the edges. Stopping high voltage is more then just the dielectric
strength.

That's why high voltage bushings have the shape they do. To increase the
path length along the surface of the insulators.

daestrom
 
On 17/05/2007 08:11 Radium wrote:
Hi:

Which material has the highest breakdown voltage and electrical
resistance?

Can this material block the flow of lightning's megavolts?

Does a material with more ohms necessarily have a higher breakdown
voltage than a material with fewer ohms?

How about the converse? Does a material with a higher breakdown
voltage necessarily have more ohms than a material with a lower
breakdown voltage?


Thanks,

Radium
Click to expand...
plonk
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top