What is the temperature of the dry-type transformer?
Insulation heat-resistant grade for the F-class epoxy resin casting transformer alarm temperature factory setting is generally 130 degrees.
It depends on the insulation of the transformer is how much. Generally the highest temperature has 105/120/130/155 degrees and so on. Normal use, more than 80 degrees on the need to use the cooling measures. Another dry-type transformers do not install the temperature sensor, then it is not alarm, only installed the temperature sensor will!
Dry-type transformers are generally 130 ° C alarm.
Most dry-type transformers now use H-class insulation. Under normal circumstances, the normal operation of the transformer temperature control control settings: 80 ℃ automatic fan, 100 ℃ automatic fan, 130 ℃ high temperature alarm, 150 ℃ high temperature trip.
National standard "dry-type transformers" GB6450-1986 on the dry-type transformer temperature limit to make the provisions.
1, the dry-type transformer coil:
A. The use of A-class insulation material, the limit operating temperature at 105 ℃, the maximum temperature rise should be less than 60K;
B. When using E-class insulation material, the maximum working temperature at 120 ℃, the maximum temperature rise should be less than 75K;
C. When using B-class insulation material, the maximum working temperature at 130 ℃, the maximum temperature rise should be less than 80K;
D. When using F-class insulation material, the maximum working temperature at 155 ℃, the maximum temperature rise should be less than 100K;
E. When using H-class insulation material, the maximum working temperature at 180 ℃, the maximum temperature rise should be less than 125K;
F. When using C-class insulation material, the maximum working temperature at 220 ℃, the maximum temperature rise should be less than 150K.
2, the core, metal parts and adjacent materials, in any case, shall not appear to make the core itself, other parts or adjacent materials damaged by the temperature. Now most of the dry-type transformers are used H-class insulation material, it is generally said that the dry-type transformer temperature should be below 180 ℃.
