What are the types of transformers?

Transformer is an electrical device used to change AC voltage. It can be divided into many types according to its purpose, structure and working principle. The following are some common types of transformers:

1. Power Transformer: A transformer used to change the voltage in the power system. It is usually used to step up or step down the voltage to meet the needs of power transmission and distribution systems.

2. Distribution Transformer: A transformer used to reduce high voltage in the power system to a lower voltage for use by users. Typically used for power distribution in urban and industrial areas.

3. Isolation Transformer: Used to isolate circuits, usually without changing the voltage. It is primarily used to provide galvanic isolation and protection of equipment while reducing electromagnetic interference.

4. Autotransformer (Autotransformer): Unlike ordinary transformers, autotransformers have only one winding, and the voltage is boosted or reduced through part of the shared winding. It is commonly used in applications such as regulating voltage, starting motors, etc.

5. Voltage Regulator: A transformer used to automatically adjust the output voltage to maintain stability. In power systems, voltage regulators are used to control the voltage in a substation or grid.

6. Current Transformer: Used to convert high current into low current of corresponding proportion, usually used for measurement and protection equipment.

7. Voltage Transformer: Used to transform high voltage into low voltage of corresponding proportion, usually used for measurement and protection equipment.

8. Special purpose transformers: including welding transformers, power transformers, audio transformers, etc., designed and manufactured according to specific needs.

9. Dry-Type Transformer: A transformer that does not use insulating oil. The insulating material is usually air or solid and is suitable for indoor environments.

10. Oil-Immersed Transformer: A transformer that uses insulating oil. The oil is used for both cooling and insulation. It is usually suitable for outdoor environments.

These are just some basic types of transformers. There are actually many more transformer types, and the specific choice depends on its use in the power system and the specific application requirements.