If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #4074
Joined: Mon Aug 29 2011, 06:58AM
Location: Australia
Posts: 335
Andre wrote ...
anyone knows where can I get some better insulation than HV oil? or the name of a epoxy that I can use, I'm working at 80KV
Fully dried oil intended as HV insulation has an incredibly high dielectric strength, something on the order of 10-15 MV per metre. Are you sure that your oil is clean and free of moisture? If your working with a transformer or similar, have you pulled a vacuum over it to eliminate air pockets? Oil should be more than enough insulation for 80kV.
If you need something stronger than oil, perhaps a very thick layer of super-high-quality PTFE sheeting? The trouble with solid dielectrics is getting a good seal on the surface you're insulating, to eliminate surface tracking. I've had a coil fail because it surface-tracked underneath the Teflon tape, something I've never witnessed with oil.
Thanks guys I found this list so I'm going to try a few things
Dielectric strength comparison between materials Material * Dielectric strength (kV/inch) Vacuum 20 Air 20 to 75 Porcelain 40 to 200 Paraffin Wax 200 to 300 Transformer Oil 400 Bakelite 300 to 550 Rubber 450 to 700 Shellac 900 Paper 1250 Teflon 1500 Glass 2000 to 3000 Mica 5000
and also this list
transformer oil seems to be stronger than Fluorinert according to the link
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
One thing to keep in mind - if you are planning on potting or submerging any high frequency circuits - be sure to account for the added dielectric constant as this will add a lot of stray capacitance in your circuit.
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
better insulation than HV oil??
