Oil-immersed power transformers, voltage class 330 kV

Oil-immersed power transformers, voltage class 330 kV
Stationary three-phase two-winding oil-immersed general purpose power transformers.

Transformers without tap-changing, with the cooling system OFAF. These transformers are designed for operation in cooperation with a generator.
Type, regulatory document Rated voltage, kV Connection of windings Losses, kW Total Weight, kg
HV LV no load loss short-circuit loss
3-phase, OFAF, 250 MVA (СТО 15352615-024-2012) 347 13,80; 15,75 Yн/D-11 214 605 ***
Transformers with on-load tap changer on the HV neutral, the range of tap-changing ± 12% x 1%, with the ONAF, OFAF cooling system.
Type, regulatory document Rated voltage, kV Connection of windings Losses, kW Total Weight, kg
HV LV no load loss short-circuit loss
3-phase, OLTC, ONAF, Split-winding, auxiliary, 40 MVA (СТО 15352615-024-2012) 330 6,3-6,3; 10,5-10,5; 10,5-6,3 YH/D-D 80 80 ***
3-phase, OLTC, OFAF, Split-winding, 63 MVA (СТО 15352615-024-2012) 330 6,3-6,3; 10,5-10,5; 10,5-6,3 YH/D-D-11-11 100 230 ***
3-phase, OLTC, OFAF, Split-winding, 125 MVA (СТО 15352615-024-2012) 330 6,3-6,3; 10,5-10,5; 10,5-6,3 Yn/D-D-11-11 80 380 168300

*** According to the design documents on the results of acceptance tests.


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