The specialists of the Third Unit of JSC “SEM” accomplished installation of the main equipment for gas insulated switchgear (GIS 330 kV) at the Leningrad NPP site. This enabled the workers of adjustment organization to start the high-voltage tests.

The tests are conducted by the specialists of company “Atomtekhenergo” under supervision of engineering supervisor LLC “HD Service”. During the procedure a unique and special "High Volt" set of equipment is used that is capable of supplying voltage up to 680 kV. There only three such sets in this country.

The test purpose is to verify GIS assembly quality. To this end each section is supplied with a voltage of 450 kV, the rated voltage being 330 kV. If the equipment is capable of withstanding the higher voltage during one minute, the installation is deemed to be of high quality and ready for operation.

Up to this moment the specialists have verified more than half of GISes. The results are positive, not a single breakdown has been registrated. This confirms the high-quality of the assembly that was fulfilled by the erection electricians of the Third Unit of JSC “SEM”.


The Holding “Titan-2” is the largest in the North-West group of companies, erecting the most important objects of the nuclear industry and energy. The organization performs a full range of construction and installation works from engineering to commissioning.

The Holding “Titan-2” is one of the main contractors for the construction of power units No. 1 and No. 2 of the Leningradskaya NPP-2. Main organizations of the company perform 30% of general construction and 80% of installation works on the site. Specialists of the holding are engaged on the objects of the Leningradskaya NPP-2 first and second power units. The works are being performed in the buildings of the reactor, turbine, electricity, water, heating system and other structures of power units.