Operating temperature description of distribution dry-type transformer
Writer： Hengfeng you electric Time：2023-04-18 views：times
Operating temperature description of distribution dry-type transformer
The operation of dry-type transformer needs a certain temperature. Generally speaking, the temperature of dry-type transformer also changes constantly. The temperature of dry-type transformer should be carried out within the normal range. How is the temperature of dry-type transformer carried out within the normal range? Follow the electrical engineer of hengfengyou and the of dry-type transformer factory to understand and consult in detail:
The temperature rise of dry-type transformer shall not exceed 70 ℃. Excessive temperature will accelerate the aging of insulating parts in the equipment. If you want to adjust the ambient temperature of the transformer during driving, it can be controlled below 50 ℃. Generally speaking, when the factory ships, set the fan cooling at 90 ℃, start the high temperature alarm at 120 ℃ and close the ultra-high temperature shutter at 160 ℃. The higher the temperature when driving, the greater the resistance value, the more heat generated and the lower the efficiency. This is a positive and negative account of the problem. For example, in the case of class F insulation system, it is appropriate to control the normal driving to 40-60 ℃. Under normal conditions, the temperature of dry-type transformer reaches 98 ℃. No more load. Generally, the temperature rise of low-voltage equipment shall not exceed 65 ℃. If the temperature is too high, it will accelerate the aging of the insulation part of the equipment and reduce its service life.
Heat resistance grade of insulating material for dry type transformer
When the coil of dry-type transformer is made of class a insulating material and its limit working temperature is 105 ℃, the high temperature rise shall be less than 60K;
When class E insulating material is used, when its ultimate working temperature is 120 ℃, the * high temperature rise shall be less than 75K;
When class B insulating material is used, when its ultimate working temperature is 130 ℃, the * high temperature rise shall be less than 80K;
When class F insulating material is used, when its ultimate working temperature is 155 ℃, the * high temperature rise shall be less than 100k;
When class H insulating material is used, when its ultimate working temperature is 180 ℃, the * high temperature rise shall be less than 125k;
When class C insulating material is used, when its ultimate working temperature is 220 ℃, the * high temperature rise shall be less than 150k.
The above are the normal temperature range and main temperature grade of common dry-type transformers for your reference. If you have any other opinions on common dry-type transformers, please log in to our website for details!
