What is the relationship between the temperature and service life of the dry transformer

2022-12-22 17:29:05

75次

Temperature is a concept of an external environment. It is also affected and restricted by temperature for the operating environment of the dry transformer. Without a good temperature, it is impossible to make the dry transformer run well. For the temperature of the dry transformer, It not only affects the operation of the dry transformer, but also affects the life of the use of dry transformers. Therefore, it is necessary to correctly grasp the temperature of the dry transformer and run a dry transformer at a suitable temperature. This is conducive to improving the dry dry Life life of the type transformer. So what is the relationship between the two?

1. The relationship between the service life of the dry transformer and the insulation temperature:
Most of the dry transformers use oil paper insulation that is A -level insulation. For a dry transformer with A -level insulation, during normal operation, when the temperature of the surrounding air is 40 ° C, the limit working temperature of the dry transformer winding is 105 ° C.
Practice and research have shown that if the winding can maintain the temperature of 95 ° C continuously, it can ensure that the dry transformer has a service life of 20 years. According to the relationship between temperature and life, it can also lead to a so -called 8 ° C rules: the life of the above temperature is the basis. Each of the winding temperature is 8 ° C, the service life of the dry transformer is shortened by 1/2.
According to relevant information and practice proof:
When the insulation operating temperature of the dry transformer is 95 ° C, the service life of the dry transformer is 20 years.
The insulation operating temperature of the dry transformer is 105 ° C, and the service life of the dry transformer is 7 years.
When the insulation operating temperature of the dry transformer is 120 ° C, the service life of the dry transformer is 2 years.
2. Correctly adjust the load of the dry transformer so that the dry transformer can reach the ideal service life:
The insulation temperature inside the dry transformer is mainly related to the size of the load current, that is, the load current is large, the insulating temperature is high, and the load current is low.
The temperature of the dry transformer is closely related to the life of the dry transformer, so it is necessary to correctly grasp the temperature of the dry transformer correctly to ensure that the dry transformer runs in the appropriate ground temperature, so that the dry transformer can exert a larger land. Advantages, ensure the safety and smooth operation of dry transformers!