SNCF Class BB 10003 locomotive was used as a test machine for operations of the TGV-TMST on 750 V and 3000 V. In 1998 the locomotive was converted back to a non-experimental class - as SNCF BB 15007. (SNCF Class BB 15000) The results were not as good as synchronous motor technology; it was not until the introduction of GTO transistor technology that series production of an asynchronous induction motored locomotive began in France, as the "Eurostar" TGV (1992), and later the BB 36000 "Astride" (1996). SNCF Class BB 10003 The locomotive SNCF BB 10003 was an experimental prototype locomotive converted from a SNCF
SNCF Class BB 47000 SNCF Class BB 47000 The SNCF Class BB 47000 "Prima" electric locomotive is a locomotive, built by Alstom. This locomotive is the quadruple-voltage version of the Class BB 27000. So far, only one locomotive, numbered 47001, has been built and was tested by Fret SNCF with a view for further orders. In 2006 it became clear that SNCF wouldn't order this version anymore and the locomotive had passed on to Alstom as a permanent test bed locomotive for testing different Alstom technologies. In 2009, the locomotive was devoid of all technical components. Its bogies were re-used by the Prima II-prototype.