Description
220kV three-winding power transformer with on-load tap-changer adopts high quality magnetic materials and efficient winding design, which has high transmission efficiency and can reduce energy loss in transmission process. The transformer can achieve precise regulation of output voltage by adjusting the voltage of the medium voltage winding in the on-load condition, and has strong on-load regulating capability. The transformer adopts a variety of safety protection measures and can operate stably in the power system with high safety and reliability.
Features:
1. Scientific computing tools: the transformer uses advanced electric, magnetic, thermal and mechanical computing software to calculate electro-magnetic field and magnetic flux leakage distributions, to analyze wave processes, and to select reliable insulation margin, thus to guarantee product reliability.
2. Reasonable structural layout: The transformer uses multilevel stepped lap helical structure to reduce the no-load losses and noise. Its core is supported by inside rods,and its winding uses cardboard tubes to enhance short circuits withstand capacity,we also uses baffle plate to direct the oil flow for reduction of winding temperature rise. Heterotypic radiators are applied to improve the cooling centers for reduction of oil temperature rise. All internal insulating parts and metal structural parts have round processed for reduction of partial discharge.
3. Advanced technology: Its core is automatically cut with high precision and few burrs. It works without folding the upper yoke, with surface coated double H curing adhesive and fastened. We have vertical winding machine with digital control tension device. Its active part adopts phase-assembly technology, and the lead is wholly pre-fabricated. Automatic control of Kerosene Vapor-phase drying process is used.
4. Perfect quality guarantee system: The company strictly controls the quality of products according to ISO19001 standard.
5. To meet the client’s needs, we can provide products of other voltage ratios, Vector Groups, and rated capacities, as listed in the table.
Product parameters：
220kV Three-winding Power Transformer With On-load Tap-changer
| Rated Capacity (kVA) | Voltage Combination (kV) |
Connection Symbol |
No-load Loss (kW) |
Full-load Loss (kW) |
Impedance (%) | No-load Current (%) | ||
| HV | MV | LV | ||||||
| 31500 |
220±8*1.25%
|
69 115 121 |
6.3 6.6 10.5 11 35 37 38.5 |
YNyn0d11 |
44 | 162 |
H-L 22-24
H-M 12-14
M-L 7-9 |
0.77 |
| 40000 | 52 | 189 | 0.70 | |||||
| 50000 |
60 |
225 | 0.63 | |||||
| 63000 | 70 | 261 | 0.63 | |||||
| 90000 |
10.5 11 35 37 38.5 |
92 | 351 | 0.56 | ||||
| 120000 | 115 | 432 | 0.56 | |||||
| 150000 | 135 | 513 | 0.49 | |||||
| 180000 | 159 | 630 | 0.49 | |||||
| 240000 | 193 | 780 | 0.45 | |||||
220kV Three-winding Auto-Transformer With On-load Tap Changer
| Rated Capacity (kVA) | Voltage Combination (kV) |
Connection Symbol |
No-load Loss (kW) |
Full-load Loss (kW) |
Impedance (%) | No-load Current (%) | ||
| HV | MV | LV | ||||||
| 31500 |
220±8*1.25% |
115 121 |
6.3 6.6 10.5 11 35 37 38.5 |
YNyn0d11 |
25 | 108 |
H-L 28-34
H-M 8-10
M-L 18-24 |
0.56 |
| 40000 | 30 | 132 | 0.56 | |||||
| 50000 |
36 |
157 | 0.49 | |||||
| 63000 | 42 | 189 | 0.49 | |||||
| 90000 | 51 | 247 | 0.42 | |||||
| 120000 |
10.5 11 35 37 38.5 |
64 | 308 | 0.42 | ||||
| 150000 | 76 | 365 | 0.35 | |||||
| 180000 | 85 | 419 | 0.35 | |||||
| 240000 | 104 | 540 | 0.30 | |||||
Application：
Packaging and Transportation：
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