In October, 2011 ООО Transconverter produced the first frequency converter PCh36 U1 for new electric suburban trains.

The frequency converter PCh36 U1 transforms the 3-phase voltage of 380V, 50 Hz into 3-phase voltage of 92..368 V, 20..80 Hz.

The frequency converter is issued to supply two air conditioners that are set on electric car ED4M and other series.

The frequency converter PCh36 U1 has a maximum output power of 47 kVA.