Prefabricated substations, also known as European-style box-type substations, are factory-prefabricated compact distribution equipment for indoor and outdoor use that combine high-voltage switchgear, distribution transformers, and low-voltage distribution equipment according to specific wiring schemes. They organically integrate functions such as transformer voltage reduction and low-voltage distribution, installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, theft-proof, heat-insulated, fully enclosed, and movable outdoor enclosure. They are particularly suitable for urban grid construction and renovation, representing a new type of substation that emerged after traditional civil substations. Prefabricated substations are suitable for mines, industrial enterprises, oil and gas fields, and wind power stations, replacing traditional civil distribution rooms and substations to become new integrated power distribution equipment.