The transformer is an indispensable device in the power supply line, and its main components are a primary coil, a secondary coil and a core (core). The main functions are: voltage conversion, current conversion, impedance transformation, isolation, voltage regulation (magnetic saturation transformer) and so on. There are often transformers recycling in the market. Today, Xiaobian wants to introduce to you about the classification of Nanjing transformers and what are the functions of Nanjing transformers.
What are the classifications of Nanjing transformer recycling:
First, according to the number of phases: (1) single-phase transformer: commonly used in single-phase load and three-phase transformer group. (2) Three-phase transformer: used for the rise and fall voltage of the three-phase system.
Second, according to the cooling method: (1) dry type transformer: relying on air convection cooling, usually used for local lighting, electronic circuits are smaller than the capacity transformer. (2) Oil-immersed transformer: rely on oil as cooling medium, such as oil-immersed self-cooling, oil-immersed air-cooled, oil-immersed water-cooled, forced oil circulation, etc.
Third, according to the purpose: (1) Power transformer: used for transmission and distribution system rise and fall voltage. (2) Instrument transformers: such as voltage transformers, current transformers, measuring instruments and relay protection devices. (3) Test transformer: It can generate high voltage and carry out high voltage test on electrical equipment. (4) Special transformers: such as electric furnace transformers, rectifier transformers, adjusting transformers, etc.
Fourth, according to the form of winding: (1) Double winding transformer: used to connect two voltage levels in the power system. (2) Three-winding transformer: Generally used in power system regional substation, connecting three voltage levels. (3) Autotransformer: A power system used to connect different voltages. It can also be used as a normal boost or post-down transformer.
5. According to the core form: (1) Core transformer: power transformer for high voltage. (2) Shell-type transformer: special transformer for high current, such as electric furnace transformer, electric welding transformer; or power transformer for electronic equipment and television, radio, etc. Recycling or recycling of used or used transformers.
Classification of transformers: 1. Classification by cooling method: natural cooling type, air cooling type, water cooling type, forced oil circulation wind (water) cooling method, and water internal cooling type. 2, according to the way of moisture classification: open transformers, potted transformers, sealed transformers. 3, according to iron core or coil structure classification: core transformer (insert core, C core, ferrite core), shell transformer (insert core, C core, ferrite core) ), toroidal transformers, metal foil transformers, radiant transformers, etc.
What are the functions of Nanjing Transformer:
Voltage conversion; current conversion, impedance transformation; isolation; voltage regulation (magnetic saturation transformer); autotransformer; high voltage transformer (dry and oil immersed), etc., commonly used core shapes of transformers are E and C cores , XED type, ED type CD type.
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