gaine d’adaptation pour Couplage

22:33 Jan 25, 2015 

Well over 24 hours from the time of posting your question, you have received just one answer; which (with all due respect to Tony) doesn’t help you much.

There are (literally) dozens of competent electrical engineers registered on Proz who work in the en/fr pair. But most of us are barred from answering your question (and from commenting on answers provided by paying members) because you:

directed this question specifically to ProZ.com users who:
... are native speakers of English
... are ProZ.com members.

I have over 40 years of engineering experience with MV systems like those referred to in your source text. I am a native speaker of (GB) English. But I have chosen not to pay for the privilege of answering your questions.

Remember: only a tiny minority of Kudoz answerers are paying members. You exclude the rest of us at your peril!

13:24 Jan 24, 2015 

Just to add that Schneider calls it 'tunnel' presumably because it is below floor level (bottom of p. 62).

13:20 Jan 24, 2015 

gaine d’adaptation pour Couplage --> tunnel for interconnecting bars

The equipment refs are from Schneider Electric:
F400 and DNF7 are a 1-40.5kV air-insulated switchboards, incorporating a withdrawable SF6 3-phase circuit-breakers with air or vacuum breakers on each phase.

Those subsystems are connected together electrically, either via a transformer (and/or other intermediate equipment), or directly via cables/busbars as shown as component 3 on the left-hand side of the diagram on p. 62 of the manufacturer's product information. In the simplest case (i.e., direct connection) the gaine d'adaptation pour couplage will be a made-to-measure (= dimensionné en fonction de la disposition physique des composantes du système) duct (the manufacturer calls it a 'tunnel') that encloses the cables/busbars to provide protection and (possible) cooling.

Compare relevant pages here:
http://ms.schneider-electric.be/Main/MCset_Fluair400/catalog...
and here
http://ms.schneider-electric.be/Main/MCset_Fluair400/catalog...

In answer to Tony's comment below, it is clear from those documents, that the French 'celule' is an English 'cubicle'.