Classification of transformers:

1. Classification by usage: There are power transformers, special transformers (electric furnace change, rectification change, power frequency test transformer, voltage regulator, mining transformer, impact transformer, reactor, transformer, etc.).

2, According to the structure type: there are single transformer, three-phase transformer and multi-phase transformer.

3. According to the cooling medium: dry type transformer, liquid (oil) dip transformer and gas transformer.

4, According to the cooling method : there are natural cold, air-cooled, water-cooled, forced oil circulation wind (water) cold, and water-cooled.

5, According to the number of coils: there are autotransformers, double windings and three winding transformers.

6, According to the conductive material: there are copper wire transformers, aluminum wire transformers and semi-copper semi-aluminum, superconducting and other transformers.

7. According to voltage regulation: It can be divided into non-excitation voltage regulating transformer and on-load voltage regulating transformer.

8, According to the neutral point insulation level: there are fully insulated transformers, semi-insulated (graded insulation) transformers.

9, According to the core type: Core type transformers, shell-type transformers and radiant transformers.