Three-Phase Oil Immersed Transformer (with OLTC)
1. The SZ11(12,13) Series 10kV, 20kV, 35kV three-phase oil-immersed transformer with OLTC is widely used in industry and agriculture power grids for urban and rural applications.
2. It also has great energy saving and environmental protection features.
3. The lamination pattern of this product changed traditional lamination craft, improving magnetic circuit distribution in the iron core. Due to this, the no-load loss, on-load current and noise are decreased by 20% and load loss decrease 10%.
4. All index complied with GB1094-1996<>, GB/T6454-2008 technical data and requirements for three-phase oil-immersed power transformers.
1. On-load regulating transformer is equipped with an on-load tap-changer.
2. It features high efficiency and low loss. This greatly reduces operating costs.
3. High reliability and advanced performance.
4. Stage three level joint for the iron core, painting curing varnish to reduce load loss and noise.
5. New winding structure, reasonable oil passage design. The new insulation structure improves strength and short circuit resistance ability.
Technical Parameters
| Rated Capacity | Vector Group | Voltage Combination (kV) | No-load current | No-load loss | Load loss | Short circuit impedance | |
| (kVA) | High Voltage | Low Voltage | |||||
| (H.V.) | (L.V.) | % | W | (75 ℃)W | % | ||
| 200 | Yyno Dyn11 | 6 ±4 ×2.5 6.3 ±4 ×2.5 10 ±4 ×2.5 10.5 ±4 ×2.5 11 ±4 ×2.5 | 0.4 | 1.80 | 330 | 2890 | 4.0 |
| 250 | 1.70 | 400 | 3400 | 4.0 | |||
| 315 | 1.60 | 475 | 4080 | 4.0 | |||
| 400 | 1.50 | 570 | 4930 | 4.0 | |||
| 500 | 1.40 | 680 | 5870 | 4.0 | |||
| 630 | 1.30 | 870 | 7230 | 4.5 | |||
| 800 | 1.20 | 1060 | 8840 | 4.5 | |||
| 1000 | 1.10 | 1240 | 10370 | 4.5 | |||
| 1250 | 1.00 | 1460 | 12300 | 4.5 | |||
| 1600 | 0.90 | 1865 | 14710 | 4.5 | |||
| 2000 | 0.80 | 2200 | 17310 | 4.5 | |||
| 2500 | 0.70 | 2610 | 21430 | 4.5 | |||
| Rated Capacity | Vector Group | Voltage Combination(kV) | No-load current | No-load loss | Load loss | Short circuit impedance | |
| (kVA) | High Voltage | Low Voltage | |||||
| (H.V.) | (L.V.) | % | W | (75 ℃) W | % | ||
| 2000 | Yd11 | 35 ±3 ×2.5 38.5 ±3 ×2.5 | 6.3 10 10.5 | 1.0 | 2160 | 19125 | 6.5 |
| 2500 | Yd11 | 1.0 | 2550 | 20530 | 6.5 | ||
| 3150 | Yd11 | 0.9 | 3030 | 24570 | 7.0 | ||
| 4000 | Yd11 | 0.9 | 3630 | 28990 | 7.0 | ||
| 5000 | Yd11 | 0.85 | 4350 | 34000 | 7.0 | ||
| 6300 | Yd11 | 0.85 | 5280 | 36550 | 7.5 | ||
| 8000 | YNd11 | 0.75 | 7380 | 40375 | 7.5 | ||
| 10000 | YNd11 | 0.75 | 8700 | 47770 | 7.5 | ||
| 12500 | YNd11 | 0.7 | 10260 | 56525 | 8.0 | ||
| 16000 | YNd11 | 0.7 | 11400 | 69890 | 8.0 | ||
| 20000 | YNd11 | 0.65 | 13500 | 80275 | 8.0 | ||
Note: Data included in the table are for reference only. For more information please contact us.
Accessories of oil-immersed type distribution transformers
Pressure relief valve
Contact thermometer
Integrated safety detector
Oil level indicator
Vibration dampers
Alternative terminations – plug-in connectors (outer cone and inner cone), busbar bushings, bushing flags, cable boxes
Product process
