• How to Use the Overload Capacity of Dry Type Transformers? The overload capability of dry type transformer The overload capacity of the dry type transformer is related to the ambient temperature, the load condition before the overload (initial load), the insu...
  • How to Maintain A Dry Type Transformer? Today's first-class dry-type transformer is primarily equipment that relies on air convection to cool. Therefore, it has good heat dissipation performance and excellent environmental applicability. Th...
  • Dry Type Transformer Cooling Method The dry mode of the dry type transformer is divided into natural air cooling (AN) and forced air cooling (AF). In the case of natural air cooling, the transformer can be operated continuously for a lo...

Introduction to Encapsulated Dry Type Transformer

Oil-free pillow transformer

The power transformer without oil pillow structure is a encapsulated dry type transformer. There is a pipe (oil column) above the transformer tank so that the oil level of the transformer is not lower than the transformer bushing. The fuel tank is covered with a heat sink, and the heat sink is a hollow thin plate that directly communicates with the fuel tank. When the oil temperature increases, the heat sink will protrude to both sides, and the plurality of heat sinks can accommodate the expanded oil.

Due to the poor heat dissipation effect of the heat sink, it is generally used for a transformer with a small capacity.

Dry power transformer

At present, transformers used in urban and large buildings have gradually adopted dry power transformers. The transformer has no fuel tank, and the iron core and the winding are installed in a common box. Dry-type transformer windings are sealed with epoxy resin to ensure sealing and insulation. There are also heat dissipation channels in the larger capacity windings. The large capacity transformer is equipped with a fan for forced ventilation. Due to material and process limitations, the current dry power transformer voltage does not exceed 35kV, and the capacity is not more than 20000kV. Large high-voltage power transformers still use oil cooling.