South-Ukraine NPP. Re-equipment. Replacement of voltage transformer type NDE-750-72U1 with name 2TN-OHL Dniprovska. Detailed design

Site location: Yuzhnoukrainsk, Mykolaiv region, Ukraine

Client: SE NNEGC Energoatom

Design stage: Detailed design

Scope of work:

• calculations for the choice of VT, confirming suitability;
• diagrams of secondary voltage circuits (from VT to output terminals of cabinets), blocking circuits, signaling the disconnected position of automatic switches in VT secondary circuits, etc.;
• sensitivity calculations of circuit breakers in VT secondary circuits;
• calculations of the section of the cables of the secondary circuits of the VT from the terminal box of the secondary circuits of the VT to the output terminals of the cabinet of the intermediate terminal, to ensure an acceptable level of voltage drop, fire and thermal resistance;
• layout diagrams of 2ТН at switchgear 750 kV;
• assignments to the plant for the manufacture of cabinets for secondary circuits of high voltage transformers and an intermediate terminal;
• cable log and external connection diagrams;
• specifications and order specifications of equipment, products, materials and spare parts;
• estimate documentation:
  • for the purchase of equipment;
  • for dismantling, installation of equipment;
  • for commissioning.

The detailed design complies with the requirements of Annexes E and G of DBN A.2.2-3:2014