• 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...

Distinguish Between Oil Immersed Power Transformers and Dry-type Transformers

It is easy to distinguish from appearances.

The biggest difference between Oil immersed power transformer and dry type transformer is there’s "oil" or not, and the oil is liquid, it can liquid, so the oil-immersed transformer must have the shell, the shell is internal transformer oil, soaked in oil of the transformer coil, the transformer coil cannot be seen from the outside; But the dry type transformer has no oil, does not need the shell, can see the transformer coil directly; Another feature is that the oil immersed power transformer has an oil pillow on top, and the transformer oil is stored inside. However, modern oil-immersed transformers are also produced without oil pillow.

Advantage of oil immersed power transformer 

In order to help the oil-immersed transformer convenience for heat dissipation, which is convenient for the flow of the internal insulation oil cooling, the external design of radiator, just as a heat sink, and the dry type transformer is don't have the radiator, radiator on transformer coil below the fan, the fan is a bit like the indoor machine of household air conditioner; 
because of the need of fire prevention, Oil immersed power transformer generally is installed in a separate transformer indoor or outdoor, and dry type transformer must be installed indoors, generally installed in the low-voltage distribution room, and low-voltage distribution cabinet side by side installation