Description
The core of 220kV power transformer is made of high quality silicon steel sheet with multi-step lamination. It has the characteristics of low loss, low noise, low partial discharge, and strong short-circuit resistance. The coil adopts high quality oxygen-free copper wire, gasket pre-compression, inside and outside support strip and other process measures to ensure that the transformer has good dynamic and thermal stability. The oil tank adopts bending corrugated bell-type, beautiful and elegant appearance, the core adopts D-type iron yoke, 45 degrees oblique joints, core and oil tank all-round positioning, can ensure that the transportation of impact resistance.
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 Double-winding Power Transformer With Off-circuit Tap Changer
| Rated Capacity (kVA) | Voltage Combination (kV) | Connection Symbol | No-load Loss (kW) | Full-load Loss (kW) | No-load Current (%) | Impedance (%) | |
| HV | LV | ||||||
| 31500 | 220 242±2*2.5% |
6.3 6.6 10.5 11 |
YNd11 | 35 | 135 | 0.7 | 12~14 |
| 40000 | 41 | 157 | 0.7 | ||||
| 50000 |
49 |
189 | 0.65 | ||||
| 63000 | 58 | 220 | 0.65 | ||||
| 75000 |
10.5 11 13.8 |
67 | 250 | 0.6 | |||
| 90000 | 77 | 288 | 0.55 | ||||
| 120000 | 94 | 345 | 0.55 | ||||
| 150000 |
11;13.8; 15.75;20 |
112 | 405 | 0.5 | |||
| 180000 | 128 | 459 | 0.46 | ||||
| 240000 | 160 | 567 | 0.42 | ||||
| 300000 |
15.75; 18;20 |
189 | 675 | 0.38 | |||
| 360000 | 217 | 774 | 0.38 | ||||
220kV Double-winding Power Transformer With Off-circuit Tap Changer With 66kV of Low Voltage
| Rated Capacity (kVA) | Voltage Combination (kV) | Connection Symbol | No-load Loss (kW) | Full-load Loss (kW) | No-load Current (%) | Impedance (%) | |
| HV | LV | ||||||
| 31500 | 220±2*2.5% |
63 66 69 |
YNd11 | 38 | 151 | 0.89 | 12~14 |
| 40000 | 45 | 176 | 0.89 | ||||
| 50000 | 53 | 211 | 0.82 | ||||
| 63000 | 63 | 247 | 0.82 | ||||
| 90000 | 83 | 323 | 0.75 | ||||
| 120000 | 102 | 387 | 0.75 | ||||
| 150000 | 122 | 453 | 0.68 | ||||
| 180000 | 138 | 513 | 0.68 | ||||
| 240000 | 171 | 635 | 0.61 | ||||
Application：
Packaging and Transportation：
Hot Tags: 220kv double-winding power transformer with off-circuit tap changer, China, suppliers, manufacturers, factory, price, made in China
