S11 Series
Oil-Immersed Power TransformerS11 series oil-immersed transformer is applicable to the 3-phase, 50Hz distribution network system. ...
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S11 series oil-immersed transformer is applicable to the 3-phase, 50Hz distribution network system. ...
S11 seriesoil-immersed transformer is applicable to the 3-phase, 50Hz distributionnetwork system. It is used for primary power input and second power output ofpower grid. This s11 series transformers accord with domestic and foreignstandards such as IEC60076, GB/T6451 and GB1094.
Features
1. The iron core of the transformers ismanufactured from a high grade, low loss, cold rolled grain oriented siliconsteel sheet. The step-lap joint structure of the iron core can be either 3steps or 5 steps. Two advanced cutting lines are used to realize automaticproduction of this lamination. Compared with normal structure, the loss of ouriron core is reduced by 7~10%, the no-load current is reduced more than 30%.
2. The coil is made of oxygen-free copperelectromagnetic wire. As a result, the usable range of layer winding isextended and the axial oil duct is added. It has following features:
4. Insulating parts are fabricated using compactingtechnology to realize a minimum shrinkage.
5. The advanced drying system is based onthe phase-change theory of kerosene to quickly squeeze the water out frominsulating parts and fully dry the whole components. The warm-up and vacuumizingof the system can be done automatically by the microcomputer. The vacuum level can reach 6 Pa. The systemalso has the functions like fault self-detection and remote diagnosis.
Item | Unit | Data | Data | Data |
Rated voltage | kV | 10/0.4 | 35/0.4 | 13058 |
Tapping range | / | ±2x2.5% | ±2x2.5% | ±3x2.5% |
Rated power | kVA | 50~2500 | 630~3150 | 2000~40000 |
Short-circuit impedance(%) | % | 4/4.5 | 6.5/7 | 6.5~8 |
Connection symbol | / | Dyn11,Yyn0 | Dyn11,Yyn0 | Dyn11,YNd11 |
Rated frequency | Hz | 50 | 50 | 50 |
Heat resistance grade | / | A | A | A |
Insulation level | kV | LI85 AC35 | LI220 AC85 | LI220 AC85/LI85 AC35 |