The box-type substation, also known as the outdoor complete substation, has the advantages of flexible combination, convenient transportation, migration and installation, short construction period, low cost, small land occupation, no pollution, and convenient maintenance; Box-type substation (hereinafter referred to as BTS) is a kind of device where high-voltage switchgear, distribution transformer and low-voltage distribution devices areorganically combined together with functions of high-voltage power receiving, transformer step-down and low-voltage distribution according to a certain wiring scheme. It is installed in a moisture-proof, rust proof, fire-proof, heat isolated and movable steel structure box, which operates in a closed manner and is close to the load center to the greatest extent. It is especially suitable for areas with small and scattered load, such as urban network construction and transformation, temporary power supply for construction, residential quarters, tourist attractions, and street lamps, etc.