- 1. The framework of substation is made of surface treated section steel, which has sufficient mechanical strength and rigidity.
- 2. The shell material can be stainless steel plate, cold-rolled steel plate, composite steel plate, metal inlaid antique wood strip, cement, etc.;
- 3. Each room is separated into an independent small room by steel plate, which can be arranged as a "mesh" font, "product" font and other forms;
- 4. In order to facilitate monitoring and maintenance, transformer room, high and low pressure room are equipped with lighting devices;
- 5. The top cover is double-layer structure, which can prevent heat radiation from increasing the indoor temperature;
- 6, the transformer is based on natural ventilation, when the temperature of the transformer room exceeds the set temperature, the axial fan installed on the top automatically starts to control the temperature of the transformer room;
- 7. Perfect protection performance, easy operation, high pressure side has a complete five anti-function to ensure the safety of maintenance;
- 8. Compact structure, beautiful appearance, can be coordinated with the surrounding environment;
- 1.Altitude ≤1000m
- 2. Ambient temperature: -25C-40° C, maximum temperature difference <
- 3. Relative humidity: The average daily relative humidity does not exceed 95%;
- 4. The average monthly relative humidity does not exceed 90%;
- 5. Earthquake resistance: ground horizontal acceleration < 0.4 m/s2;
- 6. Ground vertical acceleration 0.2m/s2;
- 7. Pollution level: Ⅲ;
- 8. There is no severe vibration and shock, and there is fire, chemical corrosion, explosion danger. Start to control the temperature of the transformer room;
- 9. Perfect protection performance, easy operation, high pressure side has a complete five anti-function to ensure the safety of maintenance;
- 10. Compact structure, beautiful appearance, can be coordinated with the surrounding environment;
| sort | Project name | unit | Main technical parameters |
| High Voltage unit | Rated frequency | Hz | 50 |
| Rated voltage | kV | 7.2 | |
| Rated current of main bus | A | 630, 1250, 1600 | |
| Rated short-time withstand current/time | K A/s | 20/4, 25/3, 31.5/4 | |
| Rated peak withstand current | kA | 50, 63, 80 | |
| Imin power frequency withstand voltage (to ground/new port) | kV | 32/36 42/48 115/95 | |
| Lightning impulse withstand voltage | kV | 60/70 75/85 185/215 | |
| Rated short-circuit breaking current | kA | 20, 25, 31.5 | |
| Short-time ground loop withstand current/time | kA/s | 20/2, 20/4 | |
| Rated short-circuit closing current of the main circuit | kA | 50, 63, 80 | |
| Rated active load breaking current | A | 630 | |
| Rated closed-loop breaking current | A | 630 | |
| Rated cable charging breaking current | A | 10 | |
| Rated capacity of no-load transformer for breaking | kVA | 1250 | |
| Rated transfer current | A | 1700 | |
| Mechanical life | Time | 3000, 5000, 10000 | |
| Low pressure unit | Rated frequency | Hz | 50 |
| Rated voltage | kV | 0.4/0.23 | |
| Rated insulation voltage | V | 690 | |
| Rated current of main loop | A | 100~3200 | |
| Rated short-time withstand current | kA/s | 30/1, 50/1, 100/1 | |
| Rated peak withstand current | kA | 63, 105, 176 | |
| 5s power frequency withstand voltage | kV | 2.5 | |
| Transformer unit | type | Oil-immersed, dry type | |
| Rated frequency | Hz | 50 | |
| Rated voltage | kV | 12(7.2)/0.4(0.23) | |
| Rated capacity | kVA | 30~1600 | |
| 1min power frequency withstand voltage | kV | 35(25) 28(20) | |
| Lightning impulse withstand voltage | kV | 75(60) | |
| Impedance voltage | % | 46 | |
| Tapping range | ±X2.5%±X5% | ||
| Coupling group | Y, yn0D, yn11 | ||
| BOX | High and low pressure chamber protection class | IP33D | |
| Protection class of transformer room | IP23D | ||
| Sound level (oil immersed/dry) | dB | ≤50/55 | |
| Secondary circuit withstand voltage level | kV | 1.5/2 |
