A modular transformer substation is designed for receiving medium voltage and 50 Hz frequency three-phase electricity, transforming it to low voltage electricity and distributing to consumers. The modular rear transformer substation complies with the requirements of IEC 62271-202 and is manufactured according to the company standard harmonized with AB ESO. Its MT housing and roof are made of 2 mm steel sheets coated with powder paint, standard color RAL-7032. The base of the construction frame is made of hot-dip galvanized steel sheets with a thickness of 4 mm. The modular transformer substation is delivered to the customer together with a reinforced concrete foundation. The installation of the power transformer substation is provided through the door.