ZBW series combined substation, commonly known as European box transformer, is a combination of high-voltage electrical equipment, transformers, low-voltage electrical equipment into a compact complete set of power distribution devices, used in urban high-rise buildings, urban and rural buildings, residential areas, high-tech development zones, small and medium-sized factories, mines and oilfields, and temporary construction of electricity and other places, for receiving and distributing electrical energy in the distribution system. ZBW series combined substations have the characteristics of strong set, small size, compact structure, safe and reliable operation, convenient maintenance, and movable. Compared with conventional earth-built substations, the combined substations of the same capacity usually cover only 1/10 to 1/5 of the conventional substations, greatly reducing the design workload and construction amount, and reducing the construction cost. In the power distribution series, it is possible to…