Transformer Substation, also known as a pre-assembled substation or prefabricated substation, is a compact indoor and outdoor power distribution equipment consisting of a high-voltage switchgear, distribution transformer, and low-voltage distribution unit, all integrated according to the wiring scheme. It organically combines functions such as transformer voltage reduction and low-voltage distribution, installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fireproof, theft-proof, heat-insulating, fully enclosed, and movable steel structure box. It is particularly suitable for urban network construction and renovation and represents a new type of substation that has emerged after the construction of civil substation buildings. The Transformer Substation is applicable to mines, factories, oil and gas fields, and wind power stations, replacing the original civil power distribution rooms and substations to become a new type of complete set of transformer and distribution equipment.