Classification of transformers.

1, Classified by use: power transformers, special transformers (electric furnace transformer, rectifier, power frequency test transformer, voltage regulator, mine transformer, audio transformer, medium frequency transformer, high frequency transformer, impact transformer, instrument transformer, electronic transformer, reactor, transformer, etc.).

2, According to the structure classification: double-winding transformer, three-winding transformer, multi-winding transformer, autotransformer.

3, According to the cooling method classification: oil immersed transformer, dry transformer.

4, According to the cooling method classification: natural cooling, air cooling, water cooling, forced oil circulation air (water) cooling, and water cooling.

5, According to the core or coil structure classification: core transformer (insert core, C-type core, ferrite core), shell transformer (insert core, C-type core, ferrite core), ring transformer, metal foil transformer, radiation transformer, etc.

6, According to the number of power phase classification: single-phase transformer, three-phase transformer, polyphase transformer.

7, According to the conductive material classification: copper wire transformers, aluminum wire transformers and half copper and half aluminum, superconducting transformers.

8, According to the voltage regulation mode classification: can be divided into no excitation voltage regulation transformer, load voltage regulation transformer.

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