Basic knowledge of box transformer

Classification of box changes:

According to the appearance and shell material, the box transformer can be divided into:

Landscape shell box change: wooden slats

Landscape shell box change: stone ordinary iron shell box change

According to the user's requirements of the appearance

The stone type:

Landscape shell box change:

Advantages: good flame retardant performance, good fire performance can be selected according to the surrounding environment and color, at the same time play a role in beautifying the environment

Batten type:

Landscape shell box change:

Advantages: strong sun resistance, not easy heat conduction, reduce the operating temperature of the internal equipment.

Frost resistance, corrosion resistance, no rust, no maintenance, long service life.

Have good moistureproof property, won't produce change because of cold hot change.

Ordinary iron shell type box change:

Advantages: good flame retardancy, good fire resistance, good mechanical properties, good impact resistance

According to the structure, it is divided into:

Combined substation (American box transformer)· Preassembled substation (European box transformer)

According to the structure of the tank, it can be divided into two types: total tank type and separate tank type.

European type box changes using ring network type and terminal type of two types.

American box characteristics:

Advantages: small size covers an area of small, easy to place, easy to camouflage, easy to coordinate with the community environment. Can shorten the length of low-voltage cable, reduce line loss, but also reduce the cost of power supply.

Disadvantages: low power supply reliability: no electric mechanism, can not add distribution automation device: no capacitor device, adverse to reduce line loss; Due to the different capacity of the civil foundation of the box change is different, so that the capacity of the box change is inconvenient; When the box becomes overloaded or the capacity of users is increased, there will be a long power cut time for civil construction reconstruction, which will increase the difficulty of the project.

Application: American box transformer is suitable for multi-storey residential buildings and other unimportant buildings with relatively low power supply requirements. According to our actual use, American box with small ring network switch station, fully suitable for multi-storey residential power demand. Because is the box change failure, the impact on residents is not big, but not suitable for small high-rise and high-rise.

European box change:

Advantages: the radiation is lower than the American box, because the European box transformer is placed in the metal box to play the role of shielding; Distribution automation can be set, but also the main advantages and disadvantages of the American box: large volume, is not conducive to installation, the environment layout of the district has a certain impact; Application: European-style box transformer is suitable for multi-storey residential buildings, small high-rise buildings, high-rise buildings and other important buildings