Application characteristics of oil immersed transformer
Writer： Hengfeng you electric Time：2023-05-09 views：times
Distribution transformer is one of the important equipment in the power supply and distribution system of industrial and mining enterprises and civil buildings. Because oil immersed transformer has the characteristics of excellent performance and low price, most power transformers use transformer oil as insulation and cooling medium.
Oil immersed transformer
Development history of oil immersed transformer
At the end of the 19th century, transformers began to use transformer oil as insulation and cooling medium, and oil immersed transformers appeared. In addition to rich natural storage and low price, transformer oil has been widely used because of its following characteristics.
Characteristics of oil immersed transformer
1) When used with fiber materials, it has good insulation performance, which can reduce insulation distance and cost.
2) Transformer oil has low viscosity and good heat transfer performance.
3) It can well protect the iron core and winding from the influence of moisture in the air.
4) Protect insulating paper and insulating paperboard from oxygen, reduce the aging of insulating materials and prolong the service life of transformer.
At present, except for some small and medium-sized capacity transformers and gas transformers for special purposes, the vast majority of large and medium-sized transformers still use transformer oil as cooling and insulation medium.
For transformers impregnated with transformer oil, the insulation heat resistance grade is class A, and the long-term working temperature is 105 ℃.
Applicable place of oil immersed transformer
1. Non enclosed oil immersed transformer: mainly including S8, S9, S10 and other series products, which are widely used in industrial and mining enterprises, agriculture and civil buildings.
2. Closed oil immersed transformer: it mainly includes S9, S9-M, s10-m and other series products, which are mostly used in places with oil and chemical substances in petroleum and chemical industries.
3. Sealed oil immersed transformer: mainly bs9, S9 -, S10 -, s11-mr, SH, sh12-m and other series products, which can be used for power distribution in industrial and mining enterprises, agriculture, civil buildings and other places.
Product drawing of oil immersed transformer
