MV/LV Prefabricated Substation

The traditional transformer is designed in the box type shell. It has small volume, light weight, low noise, low loss and high reliability. It is widely used in residential areas, commercial centers, light stations, airports, factories and mines, enterprises, hospitals, schools and other places.
As a complete set of distribution equipment, box type transformer is composed of transformer, high voltage control equipment and low voltage control equipment. Its basic principle is that through the pressure start-up system, armored wire, substation automatic system, DC point and corresponding technical equipment, reasonable assembly is carried out according to the specified sequence, and all components are installed in a specific fully sealed steel box structure such as waterproof, dustproof and rodent proof, so as to form a specific transformer. Box type transformer has been widely used in power engineering construction.
Because the box type transformer has the advantages of small space occupation, convenient operation, high application income, flexible combination mode and high operation safety, it is widely used in various fields, and has become an indispensable important power equipment in power engineering construction. The advantages are as follows:
First, because the internal structural arrangement of the box type transformer is more reasonable, it takes up less space. Compared with the traditional transformer, the box type transformer installs the high-voltage distribution equipment into a sealed steel structure box by scientific and reasonable means. Its internal structure is very compact, and the gap between various components is also quite small. Therefore, the space occupied by the box type transformer is relatively small.
Secondly, the operation method of box type transformer is very simple, convenient and convenient for rapid assembly. Through the understanding of the construction requirements of electric power engineering, the special designer can make simple and convenient operation of independent main wiring and matching equipment outside the box according to different requirements, so as to facilitate rapid assembly.
Thirdly, the application income of box type transformer is high. From the point of view of creation cost, we can clearly see that the creation cost of box type transformer is often between 300000 and 500000. From the perspective of operation cost, it can be seen that even under full load operation, the power consumption of box type transformer is about 1 million kwh less than that of ordinary transformer every year, and the maintenance cost is also less even if there are problems. Therefore, the box type transformer has higher application income.
Fourthly, the combination mode of box type transformer is flexible. Because of the compact and simple structure of the box type transformer, each unit of the box transformer is an independent system, which makes the box type transformer have a strong flexibility in the combination mode.
Fifthly, the safety and stability of box type transformer are high. Because the enclosure of the box type transformer is made of metal conductor with strong anti-corrosion ability, the interface between the internal equipment and the equipment is also made of insulating materials. There are air conditioning and dehumidification equipment in the box, which greatly improves the resistance of the box transformer to the external environment, and improves the safety and reliability of its operation.
Equipment structure
Box type transformer is not only a transformer, it is equivalent to a small substation, belongs to the distribution station, directly provides power to the user. It includes high-voltage room, transformer room and low-voltage room; the high-voltage room is the power supply side, generally 35kV or 10kV incoming line, including high-voltage busbar, circuit breaker or fuse, voltage transformer, lightning arrester, etc. in the transformer room, there are transformers, which are the main equipment of box transformer, and there are low voltage buses in the low-voltage room Busbar), low-voltage circuit breaker, metering device, lightning arrester, etc. lead out the line from the low-voltage bus bar to supply power to users.
The protection of box type transformer is specially designed to protect the transformer. It is a high-tech product of power automation which integrates protection, monitoring, control, communication and other functions. It is an ideal electrical unit for intelligent box type transformer. The product has a built-in protection library composed of more than 20 standard protection programs. It has a complete and powerful collection function of voltage and current analog quantity and switching value of primary equipment (current measurement is realized by protection CT).