There are several key differences between dry-type and oil-immersed transformers, and understanding these differences can help you better choose the right type of transformer. Here are their key differences:

1 appearance and internal structure is different:from the appearance of the encapsulation form is different, dry-type transformer can directly see the core and coil, while the oil-immersed transformer has a shell, with oil soaked coil, can not see the internal coil.

2. Leads in different forms: dry-type transformers mostly use silicone rubber bushings, while most of the oil transformers use porcelain bushings.

3. Different cooling methods: dry-type transformers use ventilation and special materials for cooling, while oil-immersed transformers use insulating oil to cool the transformer.

4. Different scope of use: dry-type transformer because of its miniaturization and easy to install the characteristics of small and local power systems for a variety of environments, while the oil-immersed transformer is suitable for large-scale power systems, industrial and mining enterprises.

5. Price difference: dry-type transformer price is higher, large volume, moisture and dust poor, noisy, there is the same risk of combustible and explosive, while the oil-immersed transformer is cheaper and easier to maintain, but there is a risk of combustible and explosive.

6. different insulation medium: dry-type transformer using gas insulation medium, such as air, nitrogen, etc., no need to maintain and deal with the oil medium, environmental protection, safety, fire safety, while the oil-immersed transformer using oil as an insulating medium, the need for regular replacement and testing of the quality of the oil, deal with waste oil and other oil pollution problems.

7. Different ways of heat dissipation: dry-type transformer through the winding or shell set up on the radiator direct heat dissipation, no radiator and other auxiliary equipment, easy to construct and install, while the oil-immersed transformer through the combination of oil and cooler indirect heat dissipation, can withstand higher loads, maintain a more stable temperature.

8. Installation places are different: dry-type transformers can be installed in the low-voltage distribution room, and installed side by side with the low-voltage distribution cabinets, while the oil-immersed transformers need to be fire-resistant, usually installed in a separate transformer indoor or outdoor.

Dry-type transformers and oil-immersed transformers have their own characteristics, suitable for different scenes, through the above introduction, you can better understand the dry-type transformers and oil-immersed transformers, and according to the actual needs of the choice of the appropriate type of transformer.