The switch cabinet has high technical performance index, which can meet the development need of the electricity market and compete with the existing imported products. The device has been widely used by power consumers and it is suitable for power distribution systems in power plants, petrochemical industry, metallurgy industry, textile industry and high-rise buildings. In the places with high automation level and computer interface such as large-scale power plants and petrochemical systems, it is a complete set of low-voltage distribution equipment for power distribution, motor centralized control and reactive power compensation in power generation and distribution system with three-phrase AC frequency 50Hz/60Hz and rated current up to 5000A.