A transformer is a device that uses electromagnetic mutual induction to transform voltage, current, and impedance. The functions of the transformer mainly include: voltage conversion; current conversion, impedance transformation; isolation; voltage regulation (magnetic saturation transformer).
The classification of commonly used transformers can be summarized as follows:
(1) 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 small-capacity transformers such as high-rise buildings, high-speed toll stations, local lighting, and electronic circuits.
(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.
(2) According to the form of winding:
(1) Two-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.
(3) According to the iron core form:
(1) Core transformer: Power transformer for high voltage.
(2) Amorphous alloy transformer: Amorphous alloy core transformer is a new type of magnetic conductive material, the no-load current is reduced by about 80%. It is a distribution transformer with ideal energy saving effect, especially suitable for rural power grids and developing regions. Where the load rate is low.
(3) 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. Shanghai Hongzhi-box transformer.
New terminal blocks for transformers have been widely used in the world's electrical and electronic engineering industries: large transformers. Transformer terminal block, structural design and convenient wiring, screw connection is strong, can be quickly and conveniently installed on the 2X10mm rail. The product design conforms to international standards such as IEC 60947-7-1.
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