Poste Extérieur
English translation: Open Air Substation
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| 15:21 Aug 26, 2012 |
| French to English translations [PRO] Tech/Engineering - Construction / Civil Engineering / Tender dossier | |||||||
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|  Selected response from: Daryo United Kingdom Local time: 16:36 | ||||||
Grading comment
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| 5 +2 | Open Air Substation |
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| 3 | Open type outdoor substation /outdoor open-type substation |
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Answers
1 hr confidence: 
peer agreement (net): +2
peer agreement (net): +2Open Air Substation Explanation: Lot 1: Poste Extérieur 220/60 kV dEL BAYADH II - 2x80 MVA Open Air Substation - Step-Down Transformers 220kV to 60kV, located at EL BAYADH II, 2 units of 80 MVA power each "Classification by insulation Switches, circuit breakers, transformers and other apparatus may be interconnected by air-insulated bare conductors strung on support structures. The air space required increases with system voltage and with the lightning surge voltage rating. For medium-voltage distribution substations, metal-enclosed switchgear may be used and no live conductors exposed at all. For higher voltages, gas-insulated switchgear reduces the space required around live bus. Instead of bare conductors, bus and apparatus are built into pressurized tubular containers filled with sulfur hexafluoride (SF6) gas. This gas has a higher insulating value than air, allowing the dimensions of the apparatus to be reduced. In addition to air or SF6 gas, apparatus will use other insulation materials such as transformer oil, paper, porcelain, and polymer insulators." [http://en.wikipedia.org/wiki/Electrical_substation] |
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Grading comment
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5 hrs confidence: 
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