Box type substation is also called prefabricated substation or prefabricated substation. It is a kind of high-voltage switchgear, distribution transformer and low-voltage distribution device. It is a factory prefabricated indoor and outdoor compact distribution device arranged in accordance with a certain wiring scheme. It is an organic combination of transformer step-down, low-voltage distribution and other functions. It is installed in a moisture-proof, rust proof, dust-proof, rat proof, fire-proof, theft-proof, heat-insulating, fully enclosed and movable steel structure box, especially It is a new kind of substation after the civil substation. Box type substation is suitable for mines, factories, oil and gas fields and wind power stations. It replaces the original civil power distribution room and power distribution station and becomes a new complete set of power transformation and distribution equipment.