The Z (Y) BW-12KV and 24KV series high/low voltage prefabricated substations, also known as European box transformers, are suitable for public distribution networks with a rated voltage of 12KV and below, a rated frequency of 50HZ three-phase AC systems, and a capacity of 1000KVA and below. They are used in residential communities, factories, mining enterprises, large construction sites, high-rise buildings, airport terminals, and temporary facilities with ring networks and terminal power supply. It connects high-voltage switchgear, distribution transformers, and low-voltage distribution equipment through cables or busbars in three different compartments. All high and low voltage distribution equipment and transformers are conventional standardized products. The intelligent prefabricated substation series can combine high-voltage switchgear (RM6 or GA switch with electric remote automatic control device), transformers, low-voltage distribution equipment, low-voltage intelligent switches, reactive power automatic compensation, and other functions according to a certain wiring scheme, enabling it to achieve remote control, telemetry, remote measurement, remote adjustment and other functions through local or remote operation.