Siemens International Trading Ltd, Shanghai has commissioned SMA Railway Technology GmbH to develop and manufacture 324 auxiliary power converters for metro vehicles. The auxiliary power converters will be integrated into the Siemens propulsion system and delivered to the Chinese manufacturer CSR ZELC.

Deliveries of the SMARTconverters for CSR, one of the largest Chinese vehicle manufacturers, have started in March 2013 and will end in 2015.

The auxiliary power converters transform and input voltage of 750 V DC into output voltages of 3 x 220 / 380 V AC and 110 V DC, 10 kW. The SMARTconverters will be in service in metro vehicles of the Turkish capital of Ankara.