1. Design work with individual construction solutions for autotransformer protection, coordination with an expert organization.
2. Construction and installation work:
2. Construction and installation work:
- dismantling of existing equipment and busbars;
- construction of a protective structure for an autotransformer made of monolithic reinforced concrete;
- installation of an oil receiver designed to receive the full volume of transformer oil;
- installation of oil drains to drain oil from the oil receiver into the existing oil sump;
- installation of new supports for equipment on the 220 kV open switchgear;
- installation of cellular-type portals, between which a mesh system (anti-drone mesh) is installed above the protective structure to prevent direct damage to the protective structure;
- installation of a working and emergency lighting system for the physical protection structure;
- grounding and lightning protection of the equipment being designed;
- installation of an autotransformer type ATDTN 125000/220/110/6 U1;
- installation of a 3-phase 220 kV surge arrester set type PCA33E192L21E2M8-245-5 with operation counters type SC13 (TycoElectronics RaychemGmbH);
- installation of a 3-phase 6 kV surge arrester set type MWK-8 (ABB);
- reconstruction and adaptation of a 6 kV bus bridge;
- installation of busbars for the 6-220 kV equipment to be installed.
- installation of a branch of cable trays 0.5 m wide;
- organization of cable connections between different links of the technological process of electricity generation.