The design of the MDTS is based on a heat-insulated container complete with lighting, heating and ventilation systems, inside of which the main and secondary equipment is mounted. The design of the containers provides for the possibility of performing the loading and unloading operations while allowing their transportation to the installation site. The transformers enclosure is fitted with reliable equipment cooling system and forced ventilation system, while noise insulation is also arranged. Each complete MDTS consists of two semi trailers with equipment containers placed onto them. MDTS 10(6)/0.4 kV is capable of operating either as a single two-transformer substation or as two single-transformer substations.

MDTS modules are of universal configuration and ensure the ease and convenience of setup and connection of main equipment to 10(6)/0.4 kV power network, including connection of controls, automation, relay protection, power metering and monitoring and signaling systems.

The switchgear units are constructed as two stand-alone containers intended for placement of individual bus sections.  Entrance for 10(6) kV and 0.4 kV cables into the MDTS is provided at the bottom part of the module, behind the HVSG racks. The containers that house the power transformers have passages arranged for inspection of the equipment (transformers and SG 0.4 kV). Each switchgear unit has its dedicated auxiliary transformer or a power transformer for connection of 0.4 kV consumers.

The containers are interconnected by control and power cables so as to allow for organization of switchgear units of the first and the second categories of power supply reliability.