ZBW Series AC combined substation combines high-voltage electrical equipment, transformers, and low-voltage electrical equipment into a compact complete set. It has the characteristics of strong set performance, small size, compact structure, safe and reliable operation, convenient maintenance and movable, etc. Compared with civil-based substations, the capacity of the box-type substation with the same capacity is usually only 1/10 to 1/5 of the conventional substation, which greatly reduces the design workload and construction volume, and reduces the construction cost.