SNCF TGV Sud-Est

The SNCF TGV Sud-Est or TGV-PSE is a French TGV train built by Alstom and operated by SNCF, the French national railway company. It is a semi-permanently coupled electric multiple unit which operates primarily between Paris and the south-east of France.

The TGV Sud-Est fleet was built between 1978 and 1988 and operated the first TGV service from Paris to Lyon in 1981. Currently there are 107 passenger sets operating, of which nine are tri-current (25 kV 50-60 Hz AC - French lignes à grande vitesse, 1500 V DC - French lignes classiques, 15 kV 16⅔ Hz AC - Switzerland) and the rest bi-current (25 kV 50–60 Hz AC, 1500 V DC). There are also seven bi-current half-sets - TGV La Poste - without seats which carry mail for La Poste between Paris and Lyon. These are painted in a distinct yellow livery.

Each set is made up of two power cars and eight carriages (capacity 345 seats), including a powered bogie in each of the carriages adjacent to the power cars. They are long and wide. They weigh with a power output of under 25 kV.

Originally the sets were built to run at but most were upgraded to during their mid-life refurbishment in preparation for the opening of the LGV Méditerranée. The few sets which still have a maximum speed of operate on routes which have a comparatively short distance on the lignes à grande vitesse, such as those to Switzerland via Dijon. SNCF did not consider it financially worthwhile to upgrade their speed for a marginal reduction in journey...
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