330kV Oil Immersed Transformer
Product introduction
330kV oil immersed power transformer is a self-developed product for the transformation of urban and rural power grids in China on the basis of absorbing advanced technologies at home and abroad. Its performance index is superior to GB/T6451< Technical parameters and requirements of three-phase oil immersed power transformer>, fully in line with manufacturing standards of JB/Y3837-1996 and GB1094.1.2-1996 and GB1094.3-2003 and GB1094.5-2008 and standard UEC-60076 recommended by International Electrotechnical Commission. This product has the outstanding characteristics of low loss, low noise and no pendant core. It has special innovation in safety, reliability, economy, etc.
Structural features
1. Low loss and noise: the core plate adopts the laminating form of high-performance silicon steel sheet and five layer step full oblique joint, which can provide low no-load loss and noise. The oil tank adopts the technology of magnetic shielding and copper shielding. According to the different positions of the leakage magnetic field, measures are taken to reduce the eddy current loss, which reduces the load loss and fundamentally solves the local overheating of the transformer.
2. Safe operation: the partial discharge capacity of the product is kept below 100pC. In order to prolong the service life of the transformer and improve its short circuit resistance, the cooling structure is designed reasonably. When the transformer is short circuited, the mechanical stress of the winding conductor is low, and there are other short-circuit withstand measures and strict production process as guarantee.
3. Reliable operation: at present, oil immersed power transformer usually controls on load operation by limiting the average temperature rise of winding to realize the thermal life of transformer. In the development process, the control of hot spot temperature is more important than that of average temperature for large capacity UHV Transformer. For transformers with natural oil circulation, the average temperature rise of oil may meet the requirements, while the temperature rise of hot spot may exceed its limit. Therefore, it is necessary to calculate and strictly control the hot spot temperature rise of large capacity transformer.
4. Easy installation and maintenance: in order to reduce the workload field installation, all accessories are pre installed before leaving the factory. The secondary cable is laid on the main body of the transformer before leaving the factory and led to the terminal box and control box. Most large capacity transformers adopt natural oil circulation and air cooling, and maintain 70% cooling capacity when the fan stopped.
Note: Due to continuous product improvement, the dimensions provided in this sample are for reference only. If necessary, our company can design and produce according to user requirements. Please contact the company in time.
| Rated Capacity (kVA) | Tapping Range of high voltage(%) | L.V. winding (kV) | Vector Group | No-Load Loss(W) | Load Loss (W) | No-load current (%) | Impedance voltage(%) |
| 90000 | 345 34±2X2.5% 363 36±2X2.5% | 10.5 13.8 15.75 18 20 | YNd11 | 68.0 | 274 | 0.44 | 14～15 |
| 12000 | 85.0 | 340 | 0.44 |
| 150000 | 101 | 402 | 0.41 |
| 180000 | 116 | 461 | 0.38 |
| 240000 | 145 | 572 | 0.34 |
| 360000 | 198 | 802 | 0.34 |
| 370000 | 202 | 818 | 0.30 |
| 400000 | 214 | 867 | 0.30 |
| 720000 | 332 | 1347 | 0.20 |
| Note: if you have any other special requirements, Please call :86-0532-80966388 |
·Order instructions:
1. The customer needs provide main parameters of the transformer (input and output voltage, capacity, loss, etc.)
2. Other customer requirements
Package Details:
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50KVA - 5MVA EHV Oil Immersed Transformer 3 Phase State Power 50 / 60Hz Frequency Images
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