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neutre non distribué mis à la terre

English translation: COMMENT ONLY...

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09:22 Mar 6, 2007
French to English translations [PRO]
Tech/Engineering - Electronics / Elect Eng / Scheme
French term or phrase: neutre non distribué mis à la terre
I've already looked at http://www.proz.com/kudoz/667628 regarding "neutre non distribué" and http://en.wikipedia.org/wiki/Earthing_system.

This relates to the electrical power supply to a ship-to-shore gantry crane for handling containers.

"Régime de neutre : neutre non distribué mis à la terre"

Would "Neutral earthing scheme: isolated neutral connected to earth" do the job or do I need to use "not distributed" instead of "isolated" although I'm not getting many ghits with "not distributed" in proximity to "earthed"??
David Goward
France
Local time: 12:07
English translation:COMMENT ONLY...
Explanation:
No David, it si NOT 'isolated' — 'not distributed' conveys the right idea, though I don't believe that is the term actually used, which probably explains why you can't find it.

What it means is that only 3 wires go out (i.e. the 3 phases), and the end equipment (or facilities, installation, etc.) will be connected in 'delta' mode (i.e. no neutral) — the only neutral is at the supply (generator, etc.) end, where it is earthed. In a properly-balanced system, there should be no need for a neutral, as no neutral current should flow; it then only acts as an earth reference, so that the 3 phase voltages are referencec w.r.t. earth.

I've a feeling that there is a special name for this in EN, which is NOT the direct translation of the FR; I did a load of research on this years ago, I remember it took me ages, but I think in the end I found out the equivalent, possibly via an IEEE website?

Sorry I can't be more help, pushed for time today!
Selected response from:

Tony M
France
Local time: 12:07
Grading comment
I've not been able to find this special name so far, but have been short of time to do a proper search. I'll edit the archive entry later if necessary. Thanks for the info provided, Tony (and Charles).
2 KudoZ points were awarded for this answer

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Summary of answers provided
3 +1COMMENT ONLY...
Tony M


Discussion entries: 1





  

Answers


19 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +1
COMMENT ONLY...


Explanation:
No David, it si NOT 'isolated' — 'not distributed' conveys the right idea, though I don't believe that is the term actually used, which probably explains why you can't find it.

What it means is that only 3 wires go out (i.e. the 3 phases), and the end equipment (or facilities, installation, etc.) will be connected in 'delta' mode (i.e. no neutral) — the only neutral is at the supply (generator, etc.) end, where it is earthed. In a properly-balanced system, there should be no need for a neutral, as no neutral current should flow; it then only acts as an earth reference, so that the 3 phase voltages are referencec w.r.t. earth.

I've a feeling that there is a special name for this in EN, which is NOT the direct translation of the FR; I did a load of research on this years ago, I remember it took me ages, but I think in the end I found out the equivalent, possibly via an IEEE website?

Sorry I can't be more help, pushed for time today!

Tony M
France
Local time: 12:07
Specializes in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 1915
Grading comment
I've not been able to find this special name so far, but have been short of time to do a proper search. I'll edit the archive entry later if necessary. Thanks for the info provided, Tony (and Charles).

Peer comments on this answer (and responses from the answerer)
agree  Charles Hawtrey: So it's star-connected at source and delta connected for delivery, only possible with a balanced load. Less copper wire needed, and smaller motor than 1-phase. See www.catas1.org/eng/elec/edu/pt14.doc
1 hr
  -> Thanks, Charles! Yes, exactly!
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