What is the difference between dry type transformer and oil?

Oil-immersed transformers and amorphous alloy transformers are different descriptions of transformer characteristics and cannot be compared.

The so-called oil-immersed transformer is a transformer that uses transformer oil or other liquids (silicone oil, vegetable oil) as the insulation and heat dissipation medium.

Correspondingly, solid insulating materials (such as epoxy resin, etc.) are used as insulation for dry-type transformers. Amorphous alloy is a special core material. Although it is a metal material, there is no crystal structure in its structure. It is a transformer that uses silicon steel sheets (or electrical steel strips) as the core. The advantage is that the no-load loss of the transformer with silicon steel sheet core will be greatly reduced.

That is to say, the oil-immersed transformer can use amorphous alloy materials to make the iron core or silicon steel sheet to make the iron core.

Similarly, a transformer that uses amorphous alloy materials to make a core can be an oil-immersed transformer that uses oil insulation, or a dry-type transformer that uses materials such as epoxy resin for insulation.

The classification of power distribution and power transformers is divided into dry type or oil-immersed type in terms of insulating materials.

From the core material, it is divided into transformers with amorphous alloy cores and transformers with silicon steel cores.

Of course, there are other sub-methods. For example, a low-voltage side of 0.4kV is usually called a distribution transformer, and a low-voltage side of 3kV or above is usually called a power transformer.