The classification of common transformers can be summarized as follows
1. Divided by phase:
1) Single-phase transformer: used for single-phase load and three-phase transformer group.
2) Three-phase transformer: used for raising and lowering voltage of three-phase system.
2. According to the cooling method:
1) Dry-type transformer: Relying on air convection for natural cooling or increasing fan cooling, it is mostly used for high-capacity buildings, high-speed toll stations, electricity, local lighting, electronic circuits 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 purpose:
1) Power transformer: used for the step-up and step-down voltage of the power transmission and distribution system.
2) Instrument transformers: such as voltage transformers, current transformers, measuring instruments and relay protection devices.
3) Test transformer: It can generate high voltage and conduct high voltage test on electrical equipment.
4) Special transformers: such as electric furnace transformers, rectifier transformers, adjustment transformers, capacitor transformers, phase-shifting transformers, etc.
4. Divided by winding form:
1) Dual winding transformer: used to connect two voltage levels in the power system.
2) Three-winding transformer: Generally used in a substation in a power system area to connect three voltage levels.
3) Autotransformer: used to connect power systems with different voltages. Can also be used as a common step-up or step-down transformer.
5. According to the form of iron core:
1) Core transformer: Power transformer for high voltage.
2) Amorphous alloy transformer: Amorphous alloy iron core transformer is a new type of magnetically conductive material, which reduces the no-load current by about 80%. It is a distribution transformer with ideal energy saving effect, especially suitable for load rates in rural power grids and developing regions. Lower places.
3) Shell-type transformers: special transformers for large currents, such as electric furnace transformers, welding transformers; or power transformers for electronic instruments and televisions, radios, etc.
1. Divided by phase:
1) Single-phase transformer: used for single-phase load and three-phase transformer group.
2) Three-phase transformer: used for raising and lowering voltage of three-phase system.
2. According to the cooling method:
1) Dry-type transformer: Relying on air convection for natural cooling or increasing fan cooling, it is mostly used for high-capacity buildings, high-speed toll stations, electricity, local lighting, electronic circuits 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 purpose:
1) Power transformer: used for the step-up and step-down voltage of the power transmission and distribution system.
2) Instrument transformers: such as voltage transformers, current transformers, measuring instruments and relay protection devices.
3) Test transformer: It can generate high voltage and conduct high voltage test on electrical equipment.
4) Special transformers: such as electric furnace transformers, rectifier transformers, adjustment transformers, capacitor transformers, phase-shifting transformers, etc.
4. Divided by winding form:
1) Dual winding transformer: used to connect two voltage levels in the power system.
2) Three-winding transformer: Generally used in a substation in a power system area to connect three voltage levels.
3) Autotransformer: used to connect power systems with different voltages. Can also be used as a common step-up or step-down transformer.
5. According to the form of iron core:
1) Core transformer: Power transformer for high voltage.
2) Amorphous alloy transformer: Amorphous alloy iron core transformer is a new type of magnetically conductive material, which reduces the no-load current by about 80%. It is a distribution transformer with ideal energy saving effect, especially suitable for load rates in rural power grids and developing regions. Lower places.
3) Shell-type transformers: special transformers for large currents, such as electric furnace transformers, welding transformers; or power transformers for electronic instruments and televisions, radios, etc.
