Different types of transformer

1、 Divided by phase number
 Single phase transformer: used for single-phase load and three-phase transformer group.
 Three phase transformer: used for voltage rise and fall of three-phase system.

2、 By cooling mode
 Dry type transformer: relying on air convection for natural cooling or increased fan cooling, it is mostly used for power consumption of high-rise buildings, high-speed toll stations, local lighting, electronic circuits and other small capacity transformers.

 Oil immersed transformer: relying on oil as cooling medium, such as oil immersed self cooling, oil immersed air cooling, oil immersed water cooling, forced oil circulation, etc.

3、 By purpose

 Power transformer: used for voltage rise and fall of transmission and distribution system.

 Instrument transformer: such as voltage transformer, current transformer, measuring instrument and relay protection device.

Test transformer: it can generate high voltage and conduct high voltage test on electrical equipment.

 Special transformers: such as electric furnace transformer, rectifier transformer, adjustment transformer, capacitive transformer, phase-shifting transformer, etc.

4、 Divided by winding form

 Double winding transformer: used to connect two voltage levels in the power system.

 Three winding transformer: it is generally used in regional substations of power system to connect three voltage levels.

 Autotransformer: used to connect power systems with different voltages. It can also be used as an ordinary step-up or step-down transformer.