• Dry Type Transformer Protection Dry type transformer can use different shells depending on the environmental characteristics and protection requirements. The IP20 protective casing is usually used to prevent the entry of solid forei...
  • What Is the Organizational Structure of the Oil Type Transformer? The transformer, also called the converter, is to convert the high-voltage electricity produced by the power plant into the low-voltage electricity required by the electric appliance in the long-dista...
  • The Cause of Common Fires in Oil Type Transformers The oil type transformer has a large amount of insulating oil and a certain amount of combustibles such as cardboard, cotton yarn, cloth, and wood. These organic combustibles are prone to fire and exp...

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