Box-type substation, depending on the structure and the use of different components, divided into American and Continental me change me change two typical style.

High and low voltage switchgear, transformers from the composition of the structure, this box-type substation called Continental me change. Likened to the high and low voltage switchgear, transformers built a house.

The structure will load switch, ring network structure is simplified and fuse into the transformer tank immersed in oil, oil-immersed arresters also used zinc oxide surge arresters, transformer oil canceled pillow, fuel tank and radiator exposed to the air, this box-type substation called American box. Likened to hang next to the transformer box.

Judging from the volume, Continental me change due to internal installation of conventional switchgear and transformers, bulky products. American box changed due to a smaller volume integrated installation.

From protection, Continental me change the use of the high-pressure side load switch plus limiting fuse protection. Occurs when a blown fuse phase with the load switch fuse striker same division three gates, to avoid missing running, the required load transfer switch has cut off current capability. Using the low side load switch current limiting fuses protect American box using the high-pressure side fuse protection, but only from the switching load switch and cut off the pressure conversion function of load current, smaller capacity. When the high-pressure side of a phase fuse blows, the low pressure side of the voltage is reduced, automatic air switch Molded undervoltage protection or overcurrent protection will be action, low voltage operation does not occur.

From product costs, the European box becomes this high. From the product price cuts, the American changed me there is a big price cut, while American box changed phase five column core can be changed to a three-phase three-column core, after the other hand, the high-pressure part of the American box can be modified from moved to the transformer tank tank outside the space occupied by high-pressure chamber.