Talk:25 kV AC

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Yes, "mains" is not a term commonly used in English in North America. However, the term "household electricity" is not a suitable alternate term in this context, even though it might be in some others, since electrified railway lines are not household. If Americans don't understand the word "mains", pick a better alternate term. --144.136.125.106 06:47, 24 December 2005 (UTC)

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[edit] 50 kv AC

"Two isolated freight lines passing through desert country had double 25 kV to 50 kV to further reduce energy losses in their transmission lines." Where were these lines? Myrtone (the strict Australian wikipedian)(talk)Contrubitions

One is in the US, the Black River coal line, IIRC.
The other is the Sanhalda iron ore line in South Africa. Tabletop 06:26, 29 October 2006 (UTC)
I'm positive i remember reading in a book (sadly the book wasn't mine and i don't have access to it now, nor do i remember the exact title) that there was one in australia too. Plugwash 14:04, 29 October 2006 (UTC)

[edit] impractical without high voltage power electronics?!

i'm sure here in the uk we had workable 25KV trains that used mechanical tap changers for power control, indeed from the sounds i hear onboard trains it seems like some railcars with tap changers in are still running. Plugwash 02:49, 30 September 2006 (UTC)

[edit] "accuracy"

Any one know why this;

 The factual accuracy of this article is disputed.
Please see the relevant discussion on the talk page. (March 2008)

has been sitting on this article for ages, i see no real contentious talk on this talk page to explain why, so I've removed it

Pickle 02:18, 28 November 2006 (UTC)

Yes look at the message above, i'm pretty sure that you can do 25KV powered systems quite practically with tap changers rather than power electronics but i don't know enough detail to correct the article. Plugwash 03:03, 28 November 2006 (UTC)
Based on Plugwash's comments, I have moved the {{Disputed|date=March 2008}} tag into the History section, where the talk about power electronics is localized.
This way, readers will not be misled into thinking that there is a question about whether, say, 25 kV is used for railroads, for example, or about other basic facts in various undisputed sections of the article.
I will try to incorporate Stevewinder's comments, below, into an improved History section, possibly with a subsection about British mechanical tapchangers, and see if that is well received and a way to resolve the disagreement.
--Eliyahu S Talk 20:41, 1 January 2007 (UTC)

In the UK electric locomotives of classes 81 - 87 (excluding 87 101) used mechanical tapchangers. On classes 81, 83 and 85 the tapchanging was done on the low-tension (secondary) side of the transformer, and on the other classes it was done on the high-tension side, using an auto-regulating winding. Tapchangers had 38 steps, except on Classes 81 & 85, which had 19 steps, each used twice via a 'buck and boost' system. Classes 81 - 85 had, in addition, two stages of traction motor field weakening. Class 86 had no field weakening, and Class 87 had one stage. Tapchangers were driven by an electric step-motor, except on Class 83 where an air motor was used.

Stevewinder 07:33, 26 December 2006 (UTC)

I strongly believe that (at the very least) this article MUST re-named. At present it is just a voltage and a frequency and has nothing to relate it to railway electrification. At the very worst I would like to have this article deleted as being "unfit for purpose" as there is more material on here about other railway electrification systems such as 50kV and 6.25kV than the main subject which is 25kV, 50Hz AC, Overhead.
If this article is not improved then I shall simply write another article, with a more meaningful title, and with content that is both relevant and accurate, and then make every effort to have this one removed.ALECTRIC451 23:11, 16 January 2007 (UTC)
If you want to rename it go right ahead noones stopping you (if your account is too new to be able to do pagemoves just propose a new title here and i'll make the move). Merging into an existing article and redirecting is also fine. Plugwash 14:16, 17 January 2007 (UTC)
Yes this page is incredibly useless. In the bigger scheme of things;
v • d • e
Railway electrification
none of the other common voltages have pages (eg 1500V DC, etc), as above the title has little to do with what the intended purpose of the article - ie talk about railway electrification. The stuff that was here about the obscure voltage of 50 kV AC was interesting because that voltage is so obscure and isn't covered in that detail on the List of current systems for electric rail traction article - maybe we need a 50 kV AC article, maybe Wikipedia can cope with article on the major types of electrification - eg 15, 25, 50 kV AC, 1500V DC, 3000V DC, etc - third rail already covers extensively its voltages, but Overhead lines doesn't for its....
Pickle 17:22, 17 January 2007 (UTC)
As stated I have two problems with this page (1) The title (2) The Content. I see two solutions (a) We rename it to "Railway Electrification - 25kV, 50Hz AC, Overhead Line" (or something along those lines) and I will undertake to improve the content. (b) We abandon it and start afresh. On balance, I am minded to choose Option (a) as this page is linked to by a large number of other articles, and I would not wish to cause disruption to the links. If someone can help with the renaming (I am still new around here) then I shall work on improving the content, such that we make this page more useful than it currently is. ALECTRIC451 19:13, 17 January 2007 (UTC)
IMHO then this page is redundant, but until the other more appropriate pages are brought up to a better standard i don't favour deleting anything first. I threw together the "Railway electrification" template, to show what IMHO are the pages out there (excluding 25 KV AC). If i understand you correctly then a renamed Overhead lines article may be the best place to relocate and improve the current material that relates to all things OLE, beyond the introduction to electrification that is (presumably) Railway electrification system. I can move pages (ie rename), i can manually alter links across Wikipedia, although someone may know how to use/have access to a bot that could do it all. Pickle 21:40, 17 January 2007 (UTC)

[edit] A Proposal

I think we are getting close to a deal! We do have a page called Overhead lines and 25kV AC is a subset of that form of railway electrification system. If we moved the material on this article across to the Overhead lines article and renamed it to "Railway Electrification - Overhead Line Systems" (or something along those lines) then I would be happy to change the articles that link to this page so that they linked to the renamed overhead lines page. This article could then (with everyones agreement) be proposed for deletion (by whatever means suits people). If we can convince people that no information will be lost, then perhaps we can "close the deal". The information on 50kV railways could also be transferred to that page (I have it saved). In time, if enough material was placed on the renamed overhead lines page then a new article (or a stub) could be created. ALECTRIC451 22:20, 17 January 2007 (UTC)

Hi everybody, my name is Dario Romani from Rome, Italy, a railfan and electric traction enthusiast. It's the fisrt time I contribute in any way to Wikipedia, and curiosity attracted me to this stub. I agree it should not stand on its own and be part of Electric Traction. It should be completely rewritten as for history, starting with the Seebach-Wettingen in 1904 in Switzerland (10 KV/50 Hz), passing thru the Hollental line in Germany and the Hungarian 16KV/50 Hz system (a praise to Professor K Kando), the French takeover of Hollental and consequent birth of 25KV/50 Hz in Alsace-Lorraine, the British experience and so on, not forgetting Rheinbraun Brennstoff AG's 6KV/50 Hz (alive and well). Why dont'I do it? I am not logged in. There are already good articles on the internet. Start from buekkernet/trainspotting. I hope everybody can copy better from what's already available. Please try and make wikipedia excellent. daromany@tiscali.it

[edit] redirect to Railway electrification system

OK i know this page is bad, and we're *slowly* working on improving all Wikipedia railway electrification articles. however until thats done and all the info on this page (and its talk page) is superfluous then we can go through the proper motions and propose deletion, not just wipe it. Pickle 02:27, 11 February 2007 (UTC)

Good revert. As one of the opponents of this page, even I was annoyed to see it removed. I wish that people who are not part of the Wiki Trains Project would post their intentions on the talk page BEFORE taking unilateral action. Okay, I will make improvements to this page in order to protect it against deletion/redirection, but on the understanding that we rename it at some point. I hate the name of this page, but its inclusion is beyond question. --ALECTRIC451 18:39, 11 February 2007 (UTC)
Eaxctly there are lots of things needing doing and this page's continued existance with its current name and contents is still in doubt but proper talk, et al that is meant to happen didn't take place Pickle 21:15, 11 February 2007 (UTC)