The commercial director of the customer company "Partner TT" was present at the tests. The company works with the largest electric power companies in Siberia and the Far East. Transformer TDTNSH - 40 000/110 will be used to ensure stable power supply during coal mining. Another unit of the same type will go to the substation in July. And in June, ERSO employees will ship the TM-6300/10 device to the customer's address.