Oil-immersed power transformers, voltage class 220 kV

Oil-immersed power transformers, voltage class 220 kV
Oil-immersed power transformers, voltage class 220 kV Oil-immersed power transformers, voltage class 220 kV Oil-immersed power transformers, voltage class 220 kV
Stationary three-phase two-winding oil-immersed general purpose power transformers
Transformers with off-circuit tap changer on HV side, the range of tap-changing ± 2 x 2,5 % with the cooling system ONAF, OFAF. These transformers are designed for operation in units of power stations.
Type, regulatory document Rated voltage, kV Connection of windings Losses, kW Total Weight, kg
HV LV no load loss short-circuit loss
3-phase, OCTC, ONAF, 25 MVA (СТО 15352615-024-2012 230 6,30; 11,00 YH/D-11 25,0 130,0 ***
3-phase, OCTC, ONAF, 40 MVA (СТО 15352615-024-2012) 230 6,30; 11,00 YH/D-11 40,0 170,0 ***
3-phase, OCTC, OFAF, 80 MVA (СТО 15352615-024-2012) 242 6,30; 10,50; 13,80 YH/D-11 60,0 280,0 ***
3-phase, OCTC, OFAF, 125 MVA (СТО 15352615-024-2012) 242 10,50; 13,80 YH/D-11 90,0 380,0 157400
3-phase, OCTC, OFAF, 80 MVA (СТО 15352615-024-2012) 242 13,80; 15,75; 18,00 YH/D-11 90,0 580,0 ***
3-phase, OCTC, OFAF, 225 MVA (СТО 15352615-024-2012) 225 15,75 YH/D-11 110,0 530,0 215000
Transformers without tap-changing, with the cooling system OFAF are designed for operation in integration with the power station.
Type, regulatory document Rated voltage, kV Connection of windings Losses, kW Total Weight, kg
HV LV no load loss short-circuit loss
3-phase, OCTC, OFAF, 125 MVA (СТО 15352615-024-2012) 242 10,50; 11,00; 11,50; 13,80 Yн/D- 11 90 380 157400
3-phase, OCTC, OFAF, 250 MVA (СТО 15352615-024-2012) 242 13,80; 15,75 Yн/D- 11 150 600 242000
3-phase, OCTC, OFAF, 400 MVA (СТО 15352615-024-2012) 242 15,75; 20,00 Yн/D- 11 200 850 ***
Transformers with on-load tap changer on the HV side, the range of tap-changing ±12x1% with the cooling system ONAF, OFAF.
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, 25 MVA (СТО 15352615-024-2012) 230 6,6; 11,0; 38,5 YH/D-11 22 120 82500
3-phase, OLTC, ONAF, 25 MVA (СТО 15352615-024-2012) 230 6,6-6,6; 11,0-11,0 YH/D-D-11-11 22 120 82500
3-phase, OLTC, ONAF, 40 MVA (СТО 15352615-024-2012) 230 6,3-6,3; 6,6-6,6; 11,0-11,0; 11,0-6,6 YH/D-D-11-11 50 170 99000
3-phase, OLTC, ONAF, split-winding, (auxiliary) 40 MVA (СТО 15352615-024-2012) 230 6,3-6,3; 6,6-6,6; 11,0-11,0; 11,0-6,6 YH/D-D-11-11 50 170 99000
3-phase, OLTC, ONAF, 63 MVA (СТО 15352615-024-2012) 242 10,5 YH/D-11 45 265 120000
3-phase, OLTC, ONAF, split-winding, (auxiliary) 63 MVA (СТО 15352615-024-2012) 230 6,3-6,3; 6,6-6,6; 11,0-11,0; 11,0-6,6 YH/D-D-11-11 45 265 120000
3-phase, OLTC, ONAF, split-winding, 63 MVA (СТО 15352615-024-2012) 230 6,3-6,3; 6,6-6,6; 11,0-11,0; 11,0-6,6 YH/D-D-11-11 45 265 120000
3-phase, OLTC, OFAF, split-winding, 63 MVA (СТО 15352615-024-2012) 230 6,3-6,3; 6,6-6,6; 11,0-11,0; 11,0-6,6 YH/D-D-11-11 45 265 ***
3-phase, OLTC, OFAF, split-winding, 100 MVA (СТО 15352615-024-2012) 230 11,0-11,0 YH/D-D-11-11 102 340 ***
3-phase, OLTC, OFAF, split-winding, 160 MVA (СТО 15352615-024-2012) 230 11,0-11,0 YH/D-D-11-11 155 500 ***
3-phase, OLTC, OFAF, split-winding, 200 MVA (СТО 15352615-024-2012) 230 11,0-11,0 YH/D-D-11-11 100 630 ***
Stationary three-phase three-winding oil-immersed general purpose power transformers
Transformers with on-load tap changer on the neutral HV side, the range of tap-changing ± 12%, ± 12, transformers with off-circuit tap-changer on MV side, the range of tap-changing ± 2 х 2,5 % with the cooling system ONAF. These transformers are designed for operation in electrical networks of external installation
Type, regulatory document; Rated voltage, kV Connection of windings Losses, kW Total Weight, kg
HV MV LV no load loss short-circuit loss
3-phase, 3-winding, OLTC, ONAF 25 MVA (СТО 15352615-024-2012) 230 27,5; 38,5 6,6; 10,5; 11,0; 27,5 YH / YH /D-0-11 30 130 94000
3-phase, 3-winding, OLTC, ONAF 40 MVA (СТО 15352615-024-2012) 230 38,5 6,6; 11,0 YH / YH /D-0-11 54 220 ***
3-phase, 3-winding, OLTC, ONAF 63 MVA (СТО 15352615-024-2012) 230 38,5 6,6; 11,0 YH / YH /D-0-11 60 270 155000

*Transformers are subject to be designed and manufactured on the customer's request in the prescribed manner.
*** According to the design documents on the results of acceptance tests.


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