Product Description
Oil immersed transformers use oil as the main insulation method and rely on oil as the cooling medium, such as oil immersed self cooling, oil immersed air cooling, oil immersed water cooling, and forced oil circulation. The main components of a transformer include iron core, winding, oil tank, oil pillow, respirator, explosion-proof tube (pressure relief valve), radiator, insulation sleeve, tap changer, gas relay, thermometer, oil purifier, etc.
Between the layers of silicon steel sheets in oil immersed transformers, due to long-term immersion in the transformer, oil can penetrate into it, and the transformer oil has elasticity and buffering effect, so the noise of oil immersed transformers is low. But its pressure regulating switch is inside the fuel tank, and the contact of the switch during pressure regulation is not visible from the outside. If the contact cannot be made, it is equivalent to a circuit breaker. If the contact is poor, it is easy to burn out the switch when the load is too high.
Operating temperature: Oil immersed transformers can operate according to the nameplate under specified cooling conditions, but the top oil temperature should not exceed 90 ºC. To prevent insulation aging of the transformer, the top oil temperature should generally not exceed 85 ºC frequently, and the alarm setting should be set at 80 ºC.
Overload: Transformers can operate under normal overload and accident overload conditions, and overload signals should be installed. If overload signals cannot be installed, a comprehensive measuring instrument should be used. The overload signal value for oil immersed transformers should be 1.1-1.2 times the rated current of the transformer. The overload signal value of dry-type transformers should be 1.2-1.3 times the rated current of the transformer (based on the current of the fan when it is running).
After the overload signal of the transformer is activated, attention should be paid to the changes in its load and temperature. If conditions permit, timely inspection and examination of the cause of the overload should be carried out. If the overload is high (more than 1.3 times the rated current) or the temperature exceeds the upper limit, the load should be reduced. When installing a comprehensive side instrument on a transformer, data should be downloaded monthly and the load analyzed. For transformers with a tendency towards overload, the data download cycle should be shortened, and the transformer load and temperature should be measured during the calculation of overload time. If conditions permit, timely inspections and checks should be conducted to identify the cause of overload. If the load on the transformer exceeds the rated current by more than 1.3 times or the temperature exceeds the upper limit, the load should be reduced.
Detailed Photos
Product Parameters
The iron core is continuously rolled without seams. The width of the R-type iron core ensures that the cross-section of the iron core is circular, while the stepped iron core is made by rolling multiple layers of width. After forming the iron core, vacuum annealing is carried out to eliminate stress and reduce losses.
S11 and 10KV low loss power transformers adopt a fully sealed corrugated oil tank structure, and the transformer oil does not come into contact with the surrounding air, so the transformer oil will not absorb external moisture, thus not reducing insulation strength; In addition, due to the inability of oxygen to enter the fuel tank, the aging of insulation materials is avoided, which improves the service life of the product and also enhances social benefits.
Technical features: Energy saving: The S11 model has an average reduction of 30% in no-load loss and 25% in load loss compared to GB/T6451, and an average reduction of 20% in operating costs.
Long service life: The transformer oil tank adopts a fully sealed structure, and the oil tank can be bolted or welded to the edge of the tank. The transformer oil does not come into contact with air, which extends its service life.
FAQ
| Are you the manufacturer or trader? |
| GANG KONG is a leading & professional manufacturer located in Zhejiangprovince of China. |
| What is your main markets? |
| Our main market is in home & a half in South-East Asia, Middle East,West-AfricaEast-European countries & Some South America..etc |
| What is your delivery & after-sales serive? |
| The delivery is according to order gty, normally for containers order we need 1month. Per each month 20 containers (20'ft or 40'ft)are no problem for us . Wecan answer user's question and solve their problem in 24 hrs per each day andgive full technical support in time to all of our products. |
| Do you accept OEM and ODM? |
| Yes. Our R & D team owns latest technology ,can develop & produce products ascustomers' drawing & under their brand |
| What is your payment terms? |
| a. 30% T/T in advance as deposit ,balanced against the shipping documents |
| b. irrevocable L/C at sight for order which amount is over 100 thousand USD |
| C. for old business partner,we can negociate together for other special terms |
| If i want to visit you ,how to do ? |
| Our company is located in Yueqing city of Zhejiang province China,which is about40 minutes by car to Wenzhou air port & 30 minutes from Yueqing train station.About 1 hrs by air from Shanghai international airport and 1 hrs from Ningbo bytrain. lf you need invitation letter before come to China,we can give it to you. |
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