What are the differences between European and American transformers?
Writer： Hengfeng you electric Time：2023-03-29 views：times
The difference between European transformer and American transformer lies in their composition, high-voltage part and application.
1、 Different composition: American transformer, high voltage protection consists of plug-in fuse, backup fuse + load switch; For European transformer, high voltage protection shall be based on load switching frequency, and air pressure, vacuum, SF6 load switch + fuse shall be selected; Larger capacity.
2、 The high voltage part is different: there are only two ways for American high voltage transformer, ring network (dual power supply) or terminal power supply. The European transformer adopts independent high-voltage unit, which can be customized according to user requirements. Since each functional unit is independent, each unit (high voltage, transformer and low voltage) can be customized according to user requirements. American transformer is limited by high voltage, its volume is small, and its performance is far less flexible than that of European transformer. But it is much cheaper than European transformers.
3、 Different applications: American transformer is suitable for multi-storey residential buildings and other non key buildings with relatively low power demand. From the actual use, after the American box transformer is equipped with a small ring network switching station, it can fully meet the power supply requirements of multi-storey houses. Due to the failure of box transformer, it has little impact on residents, but it is not suitable for small high-rise and high-rise buildings.
It is used for the public requirements that the primary side AC rated voltage is 12kV, the maximum capacity of the transformer is 1600KVA, and the working frequency does not exceed 50Hz. It is suitable for outdoor pre installed substations. The substation is externally connected through cables and can be operated from inside and outside. It is applicable to urban high-rise buildings, urban and rural buildings, residential quarters, high-tech development zones, small and medium-sized factories, mines, oil fields and places for temporary construction power. It is used for receiving and distributing power in the power distribution system.
What are the differences between European and American transformers?
Characteristics of American box type substation
Advantages: small volume, small floor area, easy placement, easy camouflage, easy to coordinate with the environment of the community. It can shorten the length of low-voltage cable, reduce line loss, and reduce the cost of power supply.
Disadvantages: low power supply reliability; Without electric mechanism, it is impossible to add distribution automation device; No capacitor device, which is unfavorable to reducing line loss; Due to the different civil foundation of box transformer with different capacity, it is inconvenient to increase the capacity of box transformer; When the box transformer is overloaded or the user increases the capacity, the civil engineering needs to be rebuilt, there will be a long power outage time, which will increase the difficulty of the project.
Application: American box type substation is applicable to the power consumption of multi-storey houses and other unimportant buildings with relatively low power supply requirements. According to our actual use, after the American box transformer is equipped with a small ring network switching station, it is fully suitable for the power supply demand of multi-storey houses. Because the failure of box transformer has little impact on residents, but it is not suitable for small high-rise and high-rise buildings.
Characteristics of European box type substation
Advantages: the radiation is lower than that of American box transformer, because the transformer of European box transformer is placed in a metal box to play a shielding role; Distribution automation can be set, and it also has the main advantages of American box transformer.
Disadvantages: the volume is large, which is not conducive to installation and has a certain impact on the environmental layout of the community;
Application: European box type substation is applicable to multi-storey residential buildings, small high-rise buildings, high-rise buildings and other important buildings
