The most important works we have performed are:

1. Diagnostics and replacement of bushings of a transformer 250 MVA 400/110 kV at substation Tzarevetz;
2. Replacement of bushings of the Main transformer No 1 at PSHPP Chaira;
3. Assembly of the Main transformer No 2 at PSHPP Chaira;
4. Diagnostics of the phase R of an autotransformer AT 401-400/231/31,5 kV at TPP Maritsa East 3;
5. Diagnostics of a transformer 250 MVA 400/110/38 kV at the metallurgic plant Kremikovtzy;
6. Replacement of bushings 400 kV and 110 kV, repair of the cooling system, thermovacuum treatment and drying of a transformer 250 MVA 400/110/38 kV at the metallurgic plant Kremikovtzy;
7. Assemblies of phase T of the transformer 400/231/31,5 kV at TPP Maritsa East 3;
8. Diagnostics of a block transformer of 630 MVA 400/24 kV at NPP Balacovo, Russia;
9. Repair works and modernization of autotransformer of 200 MVA 220/110 kV at Thermal Power Plant (TPP) Varna;
10. Diagnostics of autotransformer of 200 MVA 220/110 kV at TPP Bobov dol;
11. Diagnostics of autotransformer of 180 MVA 220/110 kV at TPP Maritsa Eats 2;
12. Repair works of block transformer 180 MVA 220/18 kV at TPP Maritsa Eats 2 - 2 units;
13. Repair works and modernization of a block transformer 200 MVA 220/15,75 kV at TPP Maritsa East 3;
14. Diagnostics of 2 transformers 200 MVA 220/15,75 kV and 32 MVA 15,75/6,3 kV at TPP Bobov dol;
15. Repair works of a block transformer 180 MVA 220/18 kV at TPP Maritsa East 2;
16. Repair works and modernization of a transformer of 40 MVA 110/6/6 kV at ASAREL Medet;
17. Repair works of a power transformer T1 31,5 MVA 6,3/20/110 kV at TPP Sofia East;
18. Overhaul works of a power transformer type 20 MVA 110 kV at HPP Sandansky;
19. Overhaul works of a power transformer type 25 MVA 110 kV at HPP Lilyanovo.
20. Emergency repair of a transformer 75 MVA 110/21/6,3 kV at the metallurgic plant Kremikovtzy;
21. Emergency repair of a transformer 80 MVA 110/21/6,3 at TPP Sofia East;
22. Reconstruction and replacement of 15 PCs. of on load tape changers for transformers at TPP Varna, Maritsa East 2, etc.;
23. Overhaul repair works of power transformer 40 MVA at TPP Sofia East;
24. Diagnostics and repair works of a turbo-generator 30 MW at the TPP Sofia East;
25. Diagnostics of a turbo-generator TVV - 165-2 at TPP Maritsa East 2;
26. Repair works and rehabilitation of a transformer 25 MVA at TPP Maritsa East 3 - 2 units;
27. Tests and diagnostics of oilfilled cables of 220 kV at Saratovska HPP - Russia;
28. Repair works of a transformer 250000/110/15,75 kV at TPP Varna;
29. Diagnostics of a transformer 1T 250000/110 - 74Y1 at TPP Bitola - Republic of Macedonia;
30. Rehabilitation of an auto-transformer 180 MVA at TPP Sofia;
31. Rehabilitation of a transformer 31,5 MVA at TPP Sofia;
32. Analysis (examination) of a turbo-generator type TB-60-2 at TPP Sofia;
33. Replacement and assembly of a power transformer 63 MVA at the metallurgic works Kremikovtzy SA;
34. Analysis (examination) of synchronous motors at the metallurgic works Kremikovtzy SA;
35. Foundation of technology and manufacturing of sections for high-voltage motors at TPP Varna, totally 1500 pcs (for smoke ventilators and circulation pumps).
36. Diagnostics and modernization of cooler system of the power transformer 25 MVA 15,75/6.3 kV, installed in PS "Bitola", Macedonia.
37. Diagnostics of generator transformer 250 MVA, 400/15,75, installed in PS "Bitola", Macedonia.
38. Major repairs and modernization of cooler system of generator transformer 250 MVA 110/15,75 kV, installed in PS "Bitola", Macedonia.
39. Major repairs of autotransformer 250 MVA, 400/110/38,5 kV, installed in substation "Stolnic", Bulgaria.
40. Major repairs of power transformer 125 MVA, 110/6,3 kV, installed in Union Miniere, Pirdop, Bulgaria.