Talk:Three-phase electric power: Difference between revisions
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== Revision as of 12:58, 27 March 2014 == |
== Revision as of 12:58, 27 March 2014 == |
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Can we clear this up? It's not clear why my edit was reverted. To my knowledge, the standard electrical install required for most home-loan financing is a 200-A 2-phase system. There are other details if you look farther up the distribution network but at a residence, there are 2 phases and a neutral. So... what's the reason for the reversion? <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Neffk|Neffk]] ([[User talk:Neffk|talk]] • [[Special:Contributions/Neffk|contribs]]) 19:41, 5 May 2014 (UTC)</span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot--> |
Can we clear this up? It's not clear why my edit was reverted. To my knowledge, the standard electrical install required for most home-loan financing is a 200-A 2-phase system. There are other details if you look farther up the distribution network but at a residence, there are 2 phases and a neutral. So... what's the reason for the reversion? <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Neffk|Neffk]] ([[User talk:Neffk|talk]] • |
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[[Special:Contributions/Neffk|contribs]]) 19:41, 5 May 2014 (UTC)</span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot--> |
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:It's fed from one of the three phases of the distribution, which is converted to a split-phase. The result is two opposing phases (180°, or + vs – of same "phase"), not two of the three three-phase (120°) phases. [[:File:Polemount-singlephase-closeup.jpg]] is pretty standard last hop before residence. Notice one primary-side bushing, and two secondary (plus center-tap neutral). [[User:DMacks|DMacks]] ([[User talk:DMacks|talk]]) 19:57, 5 May 2014 (UTC) |
:It's fed from one of the three phases of the distribution, which is converted to a split-phase. The result is two opposing phases (180°, or + vs – of same "phase"), not two of the three three-phase (120°) phases. [[:File:Polemount-singlephase-closeup.jpg]] is pretty standard last hop before residence. Notice one primary-side bushing, and two secondary (plus center-tap neutral). [[User:DMacks|DMacks]] ([[User talk:DMacks|talk]]) 19:57, 5 May 2014 (UTC) |
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It looks like two phases, but in electric-speak it counts as one. Phases that are 180 degrees apart don't count as additional phases. I agree it is a funny rule. Note also that you could use center-tapped transformers on a three-phase wye system, and, I believe, it would still be three, and not six. I don't have any reference for that, though. [[User:Gah4|Gah4]] ([[User talk:Gah4|talk]]) 02:19, 3 April 2015 (UTC) |
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== 3-times the power? == |
== 3-times the power? == |
Revision as of 02:19, 3 April 2015
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Balanced Circuits
I added a section outlining the balanced wye conneced and delta connected modes. The circuit diagrams with generator side offer more to the reader than the other two delta and wye diagrams. The voltage and current derivations add more to the story of where the VLL and VLN conversions come from than in the single phase load section. I would consider also consolidating the single phase load section moving its Unbalanced section as a second part to the balanced circuits. — Preceding unsigned comment added by Jaredmporter (talk • contribs) 22:38, 27 November 2013 (UTC)
- Sounds like a good idea. Minor point is to be careful of the WP:TONE...just say what it is, rather than saying that "we see" it or that something is good to note. DMacks (talk) 23:00, 27 November 2013 (UTC)
- That's a neat equation-alignment feature, no? DMacks (talk) 05:23, 2 December 2013 (UTC)
- yes, it is. 85.110.119.56 (talk) 06:03, 3 December 2013 (UTC)
Archived
Old discussions, some of which haven't been active in years, can be found in the talk page archives linked above. --Wtshymanski (talk) 00:40, 29 March 2014 (UTC)
Revision as of 12:58, 27 March 2014
Can we clear this up? It's not clear why my edit was reverted. To my knowledge, the standard electrical install required for most home-loan financing is a 200-A 2-phase system. There are other details if you look farther up the distribution network but at a residence, there are 2 phases and a neutral. So... what's the reason for the reversion? — Preceding unsigned comment added by Neffk (talk •
contribs) 19:41, 5 May 2014 (UTC)
- It's fed from one of the three phases of the distribution, which is converted to a split-phase. The result is two opposing phases (180°, or + vs – of same "phase"), not two of the three three-phase (120°) phases. File:Polemount-singlephase-closeup.jpg is pretty standard last hop before residence. Notice one primary-side bushing, and two secondary (plus center-tap neutral). DMacks (talk) 19:57, 5 May 2014 (UTC)
It looks like two phases, but in electric-speak it counts as one. Phases that are 180 degrees apart don't count as additional phases. I agree it is a funny rule. Note also that you could use center-tapped transformers on a three-phase wye system, and, I believe, it would still be three, and not six. I don't have any reference for that, though. Gah4 (talk) 02:19, 3 April 2015 (UTC)
3-times the power?
"While a single phase AC power supply requires two conductors (Go and Return), a three phase supply can transmit three times the power by using only one extra conductor. This means that a 50% increase in transmission cost yields a 200% increase in the power transmitted. [3]"
That depends on how the sytem is set up and under what condition power is transfered and measured. The transfer may be 3 times or squareroot(3)=1,73 times the transfer of two phase connected loads. KjellG (talk) 15:04, 28 May 2014 (UTC)
Merge
Hello. This article and three phase are about exactly the same topic. Three phase explains the mathematics of a three phase system, but I think than that should be explained here as well, since it's a single topic. Under the relevant policy on merging I think that this is an instance of overlap. I can understand having several articles on a topic when it's very lengthy and complex, like relativity (physics) and introduction to special relativity but this is not the case here. Regards. QrTTf7fH (talk) 16:10, 4 August 2014 (UTC).
- Go for it. Once you eliminate the math typesetting from three phase, there's not much content that isn't duplicated here or better off here. Wikipedia is not a textbook and showing all the derivations is a job for a textbook, not an encyclopedia. --Wtshymanski (talk) 02:50, 5 August 2014 (UTC)
As an undergraduate physics student and high-functioning autistic, these articles should be kept separate as the theory and application in the real world are quite different even though there is significant overlap. An analagous situation would be microeconomics and macroeconomics. The size and scope of the two articles here are different enough that both should be improved and contain links to each other. Another crucial point here is that physicists define electricity and mathematically treat it from a different perspective as electrical engineers. Interestingly, the first comment above mentions both special relativity and general relativity and from the perspective of the most general audience, certainly two separate articles are more than justified. Possibly the two articles could/should be merged but not until the content is both improved and simplified as to complexity so the general reader level is at least as supported as the electrical engineer reader. Cheers. Gf1422 (talk) 08:41, 1 September 2014 (UTC)
Hello, I think it is very badly written and is confusing. — Preceding unsigned comment added by 202.6.136.224 (talk) 06:01, 10 February 2015 (UTC)