How does a dry-type transformer dissipate heat ?

The external work of the dry-type transformer will continuously improve the performance and efficiency of the dry-type transformer, and the external work of the dry-type transformer will make the energy and heat inside the dry-type transformer continue to increase. At this time, the dry-type transformer The temperature of the dry-type transformer is constantly increasing. When the temperature of the dry-type transformer increases to a certain amount, the dry-type transformer will catch fire and have the possibility of explosion.

During the heavy operation of dry-type transformers, the heat generated by the loss of windings and iron cores must be dissipated in time, otherwise overheating will cause insulation damage. For small-capacity dry-type transformers, the ratio of external surface area to dry-type transformer volume is relatively large, and self-cooling methods can be used to dissipate heat through radiation and natural convection. The self-cooling method is suitable for small indoor dry-type transformers. In order to prevent fires, dry-type dry-type transformers are generally used instead of oil-immersed dry-type transformers. Since the loss of a dry-type transformer is proportional to its volume, as the capacity of the dry-type transformer increases, its volume and loss will increase with the cube of the core size, while the external surface area will only increase with the quadratic of the size.

How does a dry-type transformer dissipate heat?

Large-capacity dry-type transformer cores and windings should be immersed in oil, and the following cooling measures should be taken:

Most dry-type transformers and many electrical dry-type transformers use this cooling method.

1. For dry-type transformers with small capacity, the oil can be cooled by the smooth surface of the oil tank.

2. For medium-capacity dry-type transformers, the surface of the oil tank should be corrugated to increase its heat dissipation area, or a chip or flat tube radiator should be installed to make the oil circulate in the radiator.

3. Radiation radiators should be installed on the oil tank surface of large-capacity dry-type transformers. Use a blower or small fan to blow cool air over the radiator to enhance its cooling effect.