How is the basic working principle of a box type transformer different from that of a traditional transformer?

A box type transformer is an electric transformer integrated in a closed box, usually used for power distribution and voltage conversion. It converts high voltage electric energy into low voltage or vice versa through physical principles so that it can be effectively used in different power systems.
The basic working principle of box type transformers is the same as that of traditional transformers, both of which are based on the principle of electromagnetic induction to achieve voltage conversion. Specifically, when AC current passes through the primary winding of the transformer, a changing magnetic field is generated around it, and this changing magnetic field is transmitted to the secondary winding through the iron core of the transformer. Due to the electromagnetic induction of the secondary winding, a voltage corresponding to the primary winding is generated, thereby achieving voltage increase or decrease. In other words, the core working mechanism of box type transformers and traditional transformers is the same, both of which achieve power conversion through electromagnetic induction.
The design of box type transformers is usually more compact and highly integrated. It encapsulates all the core components of the transformer, including windings, iron cores, oil pools (if necessary), and control systems, in a sturdy box. The biggest advantage of this design is that it is easy to install and maintain, especially in places with limited space or special environmental requirements. The box structure can also provide additional protection for the transformer to prevent damage to the equipment by external factors such as weather, dust or chemical corrosion.
In contrast, traditional transformers usually do not have such an integrated design. The various components of traditional transformers may be installed separately in different equipment modules or external frames, which usually take up more space and require more external protection measures to prevent the influence of the external environment. Traditional transformers may rely more on external protection devices and systems, such as external oil cooling systems or gas insulation systems to ensure the stability and safety of their operation.
Box-type transformers are also generally more advantageous than traditional transformers in terms of protection performance. Due to the closed design of the box, it can effectively prevent the entry of moisture, dust and other external contaminants, thereby reducing the chance of transformer failure in harsh environments. Traditional transformers usually require additional protection equipment, such as external protective covers, to deal with similar environmental risks.
Although box-type transformers have many advantages in modern applications, especially in terms of compactness, protection and integration, their cost is usually slightly higher than that of traditional transformers. This is because box-type transformers require more design, manufacturing and installation costs to meet their high integration and additional protection requirements. Due to the design of the box, the size and weight of the box transformer are sometimes slightly larger than traditional transformers, especially when it needs to handle higher power, its size may be larger.