20KV oil immersed transformer
Product introduction
S11 / 20kV oil immersed distribution transformer is widely used in industrial and mining enterprises, agriculture and civil buildings, and also suitable for places with many oil and chemical substances in petroleum and chemical industries. The low-voltage winding with the capacity of 630 ~ 2000kVA adopts the tubular or spiral structure, with high mechanical strength, balanced ampere turn distribution and good short-circuit resistance.
· Service conditions
1. Altitude 1000 m
2. Maximum ambient temperature + 40 ℃
3. Minimum ambient temperature - 25 ℃
4. Sunshine intensity 0.1w/cm (wind speed: 0.5m / s)
5. Maximum daily temperature difference 25K
6. Indoor relative humidity: daily average value ≤ 95%, monthly average value ≤ 90%
7. Maximum wind speed 35m / S (Note: wind speed refers to the average wind speed during 10min 10m from the ground)
8. Load with 10 mm ice cover and 17.5 M / s wind speed
9. Earthquake resistance
The horizontal acceleration on the ground is 0.2g; and the vertical acceleration is 0.1g. The method of resonance, sine and beat wave test is adopted; 5 times of excitation, 5 waves each time, 2s interval each time. The safety factor shall not be lower than 1.67.
10. Rated frequency : 50Hz
11. Installation location: indoor / outdoor
12. Specific creepage distance of external insulation: indoor ≥ 20 mm / kV Outdoor ≥ 30 mm / kV
13. System short-circuit current: 20kV not more than 20KA
· Structural features:
1. The low-voltage winding is of cylindrical or spiral structure, with high mechanical strength and good short-circuit resistance.
2. The corrugated oil tank is adopted to replace the oil conservator. The oil tank cover and the oil tank are all welded along the edge or fastened with bolts, thus prolonging the service life of the transformer oil.
3. After oil removal, embroidery removal and phosphating treatment, the product is sprayed with three times of primer and one time of finish paint inside and outside. The product is salt fog proof, damp heat proof and fungus proof, which can meet the special requirements of metallurgy, petrochemical system and wet and polluted areas. It is beautiful and reliable.
4. The transformer oil tank is fully sealed, and equipped with pressure reducing valve, signal thermometer, gas relay, etc according to the standard requirements to ensure the safe operation of the transformer.
5. This series of products are beautiful in appearance, small in size, and can reduce the installation area. It is an ideal maintenance-free distribution product.
| Main technical parameters |
| Main circuit rated voltage(V) | .......................... | Ac 400 (600) |
| Rated voltage of auxiliary circuit (V) | .......................... | Ac 220/380 (400) dc 110/220 |
| Rated frequency (Hz) | .......................... | 50(60) |
| Rated insulation voltage(V) | .......................... | 690(1000) |
| Rated current(A) | The level of bus | ≤6000 |
| Rated short-time bus withstand current (kA/1s) | .......................... | 50,80 |
| Rated peak withstand current of bus (kA/0.1s) | .......................... | 105,176 |
| Power frequency test voltage (V/1min) | main circuit | 2500 |
| Auxiliary circuit | 1760 |
| bus | Three-phase four-wire system | A,B,C,PEN |
| Three-phase five-wire system | A,B,C,PE,N |
| Protection grade | .......................... | IP30 |
Package Details:
Product Tags:
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