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I'd like to see a discussion of 'dielectric' or 'voltage' stress, specifically methods for calculating. Seems to be missing in this and related articles. One equation I found (that I have not been able to verify or complete is: "This configuration is mathematically expressed as E = (K)2(V)/-(d)ln(D/k2d), where E, again, is the voltage stress, D is the outside diameter of the wire in mils, d is the average conductor diameter in mils, V is the voltage, and k, and k2, are proportionality constant that depends on conductor standing and size." —Preceding unsigned comment added by 192.28.2.42 ( talk) 18:34, August 30, 2007 (UTC)
Alternately, it may refer to the application of current to a gas.
Can anyone tell me what this sentence is supposed to mean before i attempt to modify it? Light current 05:58, 7 August 2005 (UTC)
I think this article could be split. Move all the electrostatic discharge stuff to electrostatic discharge, and keep just the "battery failure" "car breaking down" stuff here. I want to merge the discharge articles that mean the same thing, as in Talk:Spark gap#Clarify the difference. Thoughts? - Omegatron 13:41, August 7, 2005 (UTC)
I made some changes that may help in the flow of the article. This article is still quite brief, since electrical breakdown can occur in liquids and solids as well as gases. Small (non lightning!) electrostatic sparks are merely sparks that have lower overall available energy than higher power capacitor discharge or power circuit sparks. Bert
I was told by a very experienced physicist the the color of an arc is dependent on the material being ionised. For copper, brass etc it may be blue , but for other metals it could be different colors. Please do not revert my edits without discussing with me first. Light current 19:43, 7 August 2005 (UTC)
You are both correct... sort of. Sparks (in particular long sparks) tend to reflect the spectra of the elements within the gaseous media that have the lowest ionization energy. During brief sparks, electrode materials don't contribute to the color except in small cathode and anode spots (the active electrode-gas interface). An arc, however, causes comparatively larger incandescent anode and cathode spots to develop on each electrode. Electrode material readily evaporates from these regions, then becomes ionized within the arc, coloring it. Lightning is a brilliant blue white from ionized oxygen and nitrogen, while an arcing power line or transformer is typically green from ionized copper. Bert
Could we have something about striae [1] please from somebody who, unlike me, knows what they are talking about? Cutler 23:03, 5 August 2007 (UTC)
Should there be something in the article about glow discharge, at least a link to the "Electric glow discharge" article? 74.13.185.122 ( talk) 01:39, 8 November 2009 (UTC)
Characteristic for a glow discharge is that there's a high resistance in the circuit limiting current and preventing avalanche breakdown. The mechanism of discharge is correctly described in detail. D. May 8/6/2015 — Preceding unsigned comment added by 84.128.96.60 ( talk) 23:44, 7 June 2015 (UTC)
So, it seems to me that this page should be merged with the page entitled Breakdown Voltage.
Any seconds? 98.237.253.233 ( talk) 07:04, 4 December 2009 (UTC)
I have made some contributions to the section mechanism and I apologize for my poor English. Someone is asked to polish it up. D. May Germany 6/8/2015 — Preceding unsigned comment added by 84.128.96.60 ( talk) 23:38, 7 June 2015 (UTC)
This recent revision added incorrect and uncited information, most alarmingly claiming that ozone is non-toxic (it is not). I'm reverting this, though I've also noticed that the entire section lacks any citations even besides this contribution. I'm a bit of a noob at editing Wikipedia so I don't know how to flag it, so I'll leave it for someone who knows what they're doing. 69.120.67.207 ( talk) 00:10, 29 July 2019 (UTC)
There is a wikipedia article about "Paschen's law" which can be linked in the "voltage-current" section. Also, the "gamma" in the formula is not defined here. If I remembered how to do these edits, I would. 3piecesuits ( talk) 00:04, 25 February 2020 (UTC)
This is the
talk page for discussing improvements to the
Electrical breakdown article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||
|
I'd like to see a discussion of 'dielectric' or 'voltage' stress, specifically methods for calculating. Seems to be missing in this and related articles. One equation I found (that I have not been able to verify or complete is: "This configuration is mathematically expressed as E = (K)2(V)/-(d)ln(D/k2d), where E, again, is the voltage stress, D is the outside diameter of the wire in mils, d is the average conductor diameter in mils, V is the voltage, and k, and k2, are proportionality constant that depends on conductor standing and size." —Preceding unsigned comment added by 192.28.2.42 ( talk) 18:34, August 30, 2007 (UTC)
Alternately, it may refer to the application of current to a gas.
Can anyone tell me what this sentence is supposed to mean before i attempt to modify it? Light current 05:58, 7 August 2005 (UTC)
I think this article could be split. Move all the electrostatic discharge stuff to electrostatic discharge, and keep just the "battery failure" "car breaking down" stuff here. I want to merge the discharge articles that mean the same thing, as in Talk:Spark gap#Clarify the difference. Thoughts? - Omegatron 13:41, August 7, 2005 (UTC)
I made some changes that may help in the flow of the article. This article is still quite brief, since electrical breakdown can occur in liquids and solids as well as gases. Small (non lightning!) electrostatic sparks are merely sparks that have lower overall available energy than higher power capacitor discharge or power circuit sparks. Bert
I was told by a very experienced physicist the the color of an arc is dependent on the material being ionised. For copper, brass etc it may be blue , but for other metals it could be different colors. Please do not revert my edits without discussing with me first. Light current 19:43, 7 August 2005 (UTC)
You are both correct... sort of. Sparks (in particular long sparks) tend to reflect the spectra of the elements within the gaseous media that have the lowest ionization energy. During brief sparks, electrode materials don't contribute to the color except in small cathode and anode spots (the active electrode-gas interface). An arc, however, causes comparatively larger incandescent anode and cathode spots to develop on each electrode. Electrode material readily evaporates from these regions, then becomes ionized within the arc, coloring it. Lightning is a brilliant blue white from ionized oxygen and nitrogen, while an arcing power line or transformer is typically green from ionized copper. Bert
Could we have something about striae [1] please from somebody who, unlike me, knows what they are talking about? Cutler 23:03, 5 August 2007 (UTC)
Should there be something in the article about glow discharge, at least a link to the "Electric glow discharge" article? 74.13.185.122 ( talk) 01:39, 8 November 2009 (UTC)
Characteristic for a glow discharge is that there's a high resistance in the circuit limiting current and preventing avalanche breakdown. The mechanism of discharge is correctly described in detail. D. May 8/6/2015 — Preceding unsigned comment added by 84.128.96.60 ( talk) 23:44, 7 June 2015 (UTC)
So, it seems to me that this page should be merged with the page entitled Breakdown Voltage.
Any seconds? 98.237.253.233 ( talk) 07:04, 4 December 2009 (UTC)
I have made some contributions to the section mechanism and I apologize for my poor English. Someone is asked to polish it up. D. May Germany 6/8/2015 — Preceding unsigned comment added by 84.128.96.60 ( talk) 23:38, 7 June 2015 (UTC)
This recent revision added incorrect and uncited information, most alarmingly claiming that ozone is non-toxic (it is not). I'm reverting this, though I've also noticed that the entire section lacks any citations even besides this contribution. I'm a bit of a noob at editing Wikipedia so I don't know how to flag it, so I'll leave it for someone who knows what they're doing. 69.120.67.207 ( talk) 00:10, 29 July 2019 (UTC)
There is a wikipedia article about "Paschen's law" which can be linked in the "voltage-current" section. Also, the "gamma" in the formula is not defined here. If I remembered how to do these edits, I would. 3piecesuits ( talk) 00:04, 25 February 2020 (UTC)