In July 2017, the design office of Transconverter LLC began to develop the TGF56 U2 auxiliary converter for an AC electric locomotive.

The TGF56 U2 auxiliary converter is designed for converting single-phase alternating voltage of the winding of an electric locomotive traction transformer into three-phase voltages for supplying asynchronous electric motors of auxiliary machines and other AC equipment of an electric locomotive.

The TGF56 U2 converter will have two output channels with a three-phase rated voltage of 440 V, 60 Hz.

Each output channel will be rated for a nominal power of 90 kVA.