Dry-type Transformer Temperature Range

The temperature range of Dry Type Transformer is mainly related to the heat resistance grade of the insulation material used. Generally speaking, the normal operating temperature of the dry-type transformer should be below the maximum temperature allowed by its insulation material. The specific temperature range is as follows:

‌Maximum allowable temperature‌: When the dry-type transformer uses F-class insulation material, the maximum allowable temperature is 155℃; when using H-class insulation material, the maximum allowable temperature is 180℃‌.
‌Normal operating temperature‌: The temperature of the dry-type transformer during normal operation generally does not exceed 95℃, and it cannot be overloaded. Under normal use conditions, its temperature should be kept within a relatively stable range to avoid accelerated insulation aging and shortened equipment life‌.
‌Temperature rise limit‌: In addition to the maximum allowable temperature, dry-type transformers also have temperature rise limits. For example, the temperature rise of F-class insulation materials should be less than 100K, and the temperature rise of H-class insulation materials should be less than 125K. These temperature rise limits are to ensure that the transformer will not be damaged due to overheating during long-term operation‌.
In summary, the temperature range of dry-type transformers is limited by the heat resistance grade of their insulation materials. The normal operating temperature should not exceed its maximum allowable temperature and must be controlled within the temperature rise limit to ensure safe and stable operation of the transformer. In practical applications, the temperature range should be determined based on the specific model of the transformer and the grade of its insulation material.