Transformer installation and classification

Classification of power transformers

1. According to the number of phases:

1) Single-phase transformer: used for single-phase load and three-phase transformer group.

2) three-phase transformer: used for three-phase system up and down voltage.

2, according to the cooling mode:

1) dry transformer: rely on air convection for natural cooling or increase fan cooling, mostly used for high-rise buildings, high-speed charging stations and local lighting, electronic lines and other small capacity transformers.

2) oil-immersed transformer: rely on oil as cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, forced oil circulation, etc.

3. According to use:

1) Power transformer: used for up and down voltage of power transmission and distribution system.

2) Instrument transformers: such as voltage transformers, current transformers, for measuring instruments and relay protection devices.

3) Test transformer: can produce high voltage, high voltage test of electrical equipment.

4) Special transformers: such as furnace transformers, rectifier transformers, adjusting transformers, capacitive transformers, phase-shifting transformers, etc. Basic track horizontal error roller rotation is flexible, roller brake assembly is firm