Sum up the application knowledge of various transformers
Time: 2019.09.27 Source: http: //qrfw813t.icu Author: Shanghai Mechanical and Electrical Equipment Co., United States
The primary role of a power transformer is to change the voltage to facilitate power transmission. Divided by cooling method: Dry-type transformer: Relying on air convection for cooling, it is generally used for small-capacity transformers such as lighting and electronic circuits. 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.
Divided by phase: single-phase transformer: used for single-phase load and three-phase transformer group. Three-phase transformer: used for raising and lowering voltage of three-phase system. According to use: Power transformer: used for the rise and fall voltage of the power transmission and distribution system. Instrument transformers: such as voltage transformers, current transformers, used to measure appearance and relay protection equipment.
Experimental transformer: It can generate high voltage and conduct high-voltage experimental transformers for electrical equipment. Special transformer: such as electric furnace transformer, rectifier transformer, adjustment transformer, etc. Divided by iron core method: core transformer: power transformer for high voltage. Shell-type transformers: special transformers for large currents, such as electric furnace transformers, electric welding transformers; divided by winding method.
Dual winding transformer: used to connect two voltage levels in the power system. Three-winding transformer: Generally used in substations in the power system, connecting three voltage levels. Autotransformer: used to connect power systems with different voltages. Can also be used as a general step-up or step-down transformer.