The BKYBW-12 series AC prefabricated substation is a compact, complete power distribution unit that combines high-voltage electrical equipment, transformers, and low-voltage electrical equipment. It is used in urban high-rise buildings, rural buildings, residential communities, high-tech development zones, small and medium-sized factories, mines, oil fields, and temporary construction sites for receiving and distributing electrical energy within the power distribution system. The BKYBW-12 series prefabricated substation features strong integration, small size, compact structure, safe and reliable operation, convenient maintenance, and portability. Compared to conventional civil engineering substations, a prefabricated substation of the same capacity typically occupies only 1/10 to 1/5 of the floor space, significantly reducing design and construction workload and costs. In power distribution systems, it can be used in ring network distribution systems, as well as dual-power or radial t