European box change and American box change difference
Today, I will give you a popular science about European box change and American box change in the end where is the difference between them, please follow me to see it.
So what is a box change?
In the sense of box transformer: it refers to box-type substation, generally refers to pre-installed substation, but also non-pre-installed type (size, transportation and other restrictions can not be pre-installed). According to GB 17467-2010 High/Low Voltage Pre-Installed Substations, pre-installed substations are defined as type tested equipment used to transfer electrical energy from a high voltage system to a low voltage system or from a low voltage system to a high voltage system. It includes transformers, low - and high-voltage switchgear, connecting wires and auxiliary equipment in the housing. Generally speaking, we can quickly distinguish American box variants from American box variants according to their appearance. In addition, because the structural characteristics and stability of the American box transformer and the American box transformer are not the same, the application site is also different.
The difference between European box transformer and American box transformer wiring:
The United States box transformer generally has one or two 10KV incoming line, low voltage group outlet cable, 4~6 separate transformer, transformer is generally 500KVA~800KVA. When the European box transformer is a single transformer, there are two 10KV incoming line, a single transformer is generally 500KVA~800KVA, low voltage group outlet cable is generally 4~6. Two transformers have two 10KV incoming lines, each transformer is 500KVA~800KKVA, low-voltage group outlet cable is generally 8~12.
The advantages and disadvantages of European box and American box:
American box-type transformer has the advantages of small size, small total area, convenient installation, convenient concealment, and harmonious community environment. It can reduce the length of cable, reduce the loss of distribution line, reduce the cost of distribution equipment. The disadvantage of American box-type transformer is low distribution stability; Without electric organization, distribution automation equipment cannot be improved; No power capacitor equipment, unfavorable to reduce the distribution line loss; The noise is higher than the level 3 station and level 5 station, because the level 3 station and level 5 station will put the transformer in the room, with sound insulation and noise reduction effect; In addition, the centralized electromagnetic wave radiation of the level 3 and 5 stations is dissolved into more radiation sources; Because the civil engineering is not the same as the volume box transformer, the box volume is not convenient; When the load of the box changes or the volume of the customer increases, the civil engineering must be rebuilt, the power failure time is long, and the difficulty coefficient of the project is increased.
European type box is characterized by noise equivalent to three type station and one type station, the radiation source is less than the American type box, because the classical European type box transformer in the metal material box has the interception effect, can set the distribution automation, not only has the advantages of three type station and one type station, and has the specific advantages of the American type box. But the deficiency is large volume, unfavorable installation, reasonable layout of community environment has certain harm.
Generally speaking, there are all kinds of defects in the United States and Europe, but due to the development of science and technology, distribution automation, capacitor compensation and other cutting-edge technologies continue to use, box transformer will replace the traditional earth house distribution power station, become an indispensable part of the power supply system. Shunzhi Electric Power Equipment Co. LTD. SHZPower is a supplier of electrical automation, medium and low voltage switchgear, box-type substation, distribution cabinet and multimedia box.
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