Extremely lightweight MEE-NTSD auxiliary power supply for the entire train with multi-level, active redundancy for the new Coradia Nordic vehicles. SMA provides auxiliary power supplies for a total of 55 commuter trains for Storstockholm Lokaltrafik (SL). They are manufactured by ALSTOM LHB in Salzgitter and belong to the family of regional commuter trains CORADIA.

The auxiliary power supply for CORADIA LIREXTM for Storstockholm Lokaltrafik (SL) belongs to SMA's product family MEE-NTSD (SD = Short Distance) for regional trains and is based on the MEE-NT platform. SMA has thus an innovative and sophisticated modular platform proven in daily use for auxiliary power supplies in different applications.

Conclusion
SMA's MEE-NTSD is a sophisticated platform of auxiliary power supplies for short-distance traffic. This auxiliary power supply features power converters operating in parallel for reasons of redundancy. Based on this innovative and trendsetting platform it was possible to develop an ultra-lightweight auxiliary power supply for CORADIA LIREX of SL.