This product is suitable for the power supply system with 50-60Hz, 3.6-35kV voltage and rated current 400-6300A. The enclosed busway has advanced structure, simple installation and strong safety, as well as excellent anti-short-circuit performance. Owing to aluminum or weak magnetic steel shell protection, it can effectively reduce eddy current or circulation structure of fever, and the temperature of the enclosed bus shell. Moreover, it can also reduce the power losses and electric power and increase the current-carrying capacity.