[Types of transformers] What types of transformers are there How many types of transformers are there?
Transformers are divided according to their uses:
Power transformers are used to increase and decrease voltage in power transmission and distribution. Commonly used transformers.
Test transformers to generate high voltage and conduct high-voltage tests on electrical equipment.
Instrument transformers, such as voltage transformers and current transformers, are used in measuring instruments and relay protection devices.
Special purpose transformers, such as electric furnace transformers for smelting, rectifier transformers for electrolysis, welding transformers for welding, and voltage regulating transformers for testing.
TransformersDivided according to the number of phases:
Single-phase transformers, used for single-phase loads and three-phase transformer groups.
Three-phase transformer, used to step up and down the voltage of a three-phase system.
According to winding form:
Autotransformer, used to connect ultra-high voltage and large-capacity power systems.
Two-winding transformer, used to connect two voltage levels.
Three-winding transformers, connected to thirty voltage levels, are generally used in regional substations of power systems.
TransformersAccording to core type:
Core-type transformers are used for high-voltage power transformers.
Shell type transformers are special transformers used for large currents, such as electric furnace transformers and welding transformers.
TransformersDivided according to cooling methods:
Oil-immersed transformers, such as oil-immersed self-cooling, oil-immersed air-cooling, Oil-immersed water cooling, forced oil circulation and water internal cooling, etc.
Dry-type transformers rely on air convection for cooling and are generally used for small-capacity transformers such as local lighting and electronic circuits.
Inflatable transformers use special chemical gas (SF6) instead of transformer oil for heat dissipation.
Evaporative cooling of the transformer, using special liquid instead of transformer oil for insulation and heat dissipation.
TransformersAccording to capacity:
Small, Voltage (kV): ≤35, Capacity (kVA): 5～500
Medium size, Voltage (kV): ≤35, Capacity (kVA): 630～6300
Large, Voltage (kV): ≤110, Capacity (kVA): 8000～63000
Special Large, Voltage (kV): ≥ 220, Capacity (kVA): ≥ 3150
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