S9 series oil immersed distribution transformer is suitable for 3.6kV up to 40.5kV power class. These series of distribution transformers is oil-immersed with power rating from 25 to 2500 kVA at 50/60 Hz power transmission and distribution system for power supply and lighting in industrial and agricultural field.
Scheme and connection group of windings is optional: Dyn0,Dyn5,Dyn11,YY0 etc. according to customer demand it is possible to make transformers with different connection of the Voltages and other construction solution.
Service environment:
- a) Air temperature: Maximum temperature: +40℃; Minimum temperature: -25℃.
- b) Humidity: Monthly average humidity 95%; Daily average humidity 90%.
- c) Altitude above sea level: Maximum installation altitude: 2500m.
- d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
- e) No frequent violent shake.
Features:
1. Energy saved: Compared with old type S7, no-load loss decreases 10.25% averagely and on-load current decreases 37.9%, which means 18.39% operation cost is reduced.
2. Long-term reliable service life: Fully enclosed transformer tank and rim shall be bolted together or welded firmly. Isolation between oil and air keeps insulation away from moisture, which lowers insulation aging and improves service life.
3. Free from untanking: Free from untanking before operation, so its cost is saved.
4. Free from maintenance
5. Low noise: Impacted structure in design, new material and new technology adopted and low noise.
6. Small size and artistic appearance: Owing to the corrugated plate used for radiation, oil volume is changed by adjustment and compensation through expansion and shrinkage of corrugated plate when the temperature of oil is changed. Corrugated tank is small size in good looking.
