A substation is a type of high voltage switching system, a distribution transformer and a low voltage energy distribution device. It is a compact power distribution system for the inner and outer areas, pre-fabricated on the factory side, arranged according to a specific wiring scheme. Combined, the substation is installed in a moisture-protected, rust-free, dust-tight, nail-resistant, fire-resistant, theft-resistant, heat-insulating, fully closed and drivable steel case, which is particularly suitable for urban network construction and conversion, A new type of substation is created after the civil substation.