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An American box-type substation, also known as a prefabricated substation or a compact substation, is an electrical power distribution system designed to integrate high-voltage electrical equipment within a compact, weatherproof, and often portable enclosure. This type of substation is widely used in urban areas, industrial facilities, and wherever space is limited, requiring efficient and safe power distribution.

The key advantages of American box-type substations include:

1. Compactness: All necessary equipment is integrated into a single, space-saving unit. It is about 1/3 of the European box-type substation with the same capacity and 1/5 of the distribution room;

2. Ease of Installation: Being prefabricated, they can be quickly installed on site with minimal disruption. In addition, simple maintenance, and relatively low comprehensive cost;

3. Flexibility: They can be easily relocated if needed and are adaptable to various site conditions.

4. Safety: Enclosed design enhances safety by protecting the equipment from environmental factors and unauthorized access.

5. Standardization: Many components are standardized, simplifying maintenance and replacement.

These substations are designed to meet strict safety standards and regulations, ensuring reliable and safe power distribution.