Class 628 EMU of DB-Nahverkehr, seen on RE 5215 (Luxembourg Ville---> Trier Hbf), while crossing the Sure river, which marks the German-Luxemburg border.
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The voltage change-over (25kV 50Hz AC ---> 15kV 16 2/3Hz AC) is well in evidence here, yet irrelevant in this case.
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Wasserbillig [Igel Frontière].
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25th May 2006. 
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P.L.Guillemin (plguillemin@yahoo.fr)