What Is The Temperature Rise Design Of The Oil Immersed Transformer？

Oil-immersed transformer temperature is an inherent characteristic of oil-immersed transformer, generally speaking, the temperature specification of oil-immersed transformer is more important, the temperature of common oil-immersed transformer is constantly improved with the strength of the oil-immersed transformer operation, but the temperature of oil-immersed transformer also has a certain rising temperature. There are also certain rules to follow about the temperature rise of oil-immersed transformers. What are the common temperatures of oil-immersed transformers? We are still working with the small editor of our oil-immersed transformer manufacturer to feel the first rules of the various temperature changes and increases of oil-immersed transformers:

1. The winding of the general oil-immersed power oil-immersed transformer is related to the temperature rise of the air around the oil-immersed transformer, and the internal control specification is 65K, which refers to the uniform temperature rise of the winding, rather than the most popular temperature rise, and is considered according to the class A insulation level (105 degrees). However, in general, the oil-immersed transformer design will be controlled below 65K. 2, China’s oil-immersed transformer code rules: the highest annual average temperature of 20 degrees, the highest monthly average temperature of 30 degrees, the highest temperature of 40 degrees. 3, winding temperature, under normal circumstances, the user can not be detected. But the temperature at the top of the oil is detectable. Therefore, in the oil-immersed transformer manufacturer, the temperature rise of the top layer of oil has been made a rule, which is 55K. Of course, it will also be controlled below 55K when designing and manufacturing. And in this case, the winding temperature rise does not exceed 65K. 4, therefore, the operation part of the rule: no matter how much the ambient temperature, the oil immersed transformer oil top temperature can not exceed 85 degrees. This ensures that the most popular winding temperature of the oil-immersed transformer does not exceed 98 degrees. The winding uniform temperature does not exceed 85 degrees. In this case, the life of the oil-immersed transformer is 20 years.