Transformers are very common power facilities in daily life, mainly based on the principle of electromagnetic induction. We often see high-voltage transformer boxes on the streets, inside which there are transformers. So, do you know what types of transformers there are?
What types of transformers are there
1. By phase number:
1) Single-phase transformer: Used for single-phase loads and three-phase transformer groups.
2) Three-phase transformer: It is used for raising and lowering voltage in a three-phase system.
2. By cooling method:
1) Dry-type transformers: They rely on air convection for natural cooling or by adding fans for cooling. They are mostly used in high-rise buildings, power supply at expressway toll stations, local lighting, electronic circuits and other small-capacity transformers.
2) Oil-immersed transformers: Relying on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, and forced oil circulation, etc.
3. By application:
1) Power transformer: It is used for raising and lowering voltage in power transmission and distribution systems.
2) Instrument transformers: such as voltage transformers and current transformers, used in measuring instruments and relay protection devices.
3) Test transformer: It can generate high voltage and conduct high-voltage tests on electrical equipment.
4) Special transformers: such as electric furnace transformers, rectifier transformers, regulating transformers, capacitive transformers, phase-shifting transformers, etc.
4. Classified by winding form:
Double-winding transformer: It is used to connect two voltage levels in the power system.
2) Three-winding transformer: Generally used in regional substations of power systems to connect three voltage levels.
3) Autotransformer: It is used to connect power systems of different voltages. It can also be used as a common step-up or step-down transformer.
5. Classified by core form:
1) Core-type transformer: A power transformer used for high voltage.
2) Amorphous alloy transformer: Amorphous alloy core transformers are made of new magnetic conductive materials, reducing no-load current by approximately 80%. They are distribution transformers with relatively ideal energy-saving effects and are particularly suitable for rural power grids and developing regions with low load rates.
3) Shell-type transformers: Special transformers used for large currents, such as electric furnace transformers and welding transformers; Or power transformers used for electronic instruments and televisions, radios, etc.