BSM3 busway system is a product that our company has developed after long-term practice and continuous experiments in busway industry. Its conductor adopts T2 quality copper; its conductor that selected is thin and wide, which takes full advantage of the skin effect of conductors. Since the conductor is wide, the area of heat dissipation is large; the effect of small loading area conductor possesses rather large current carrying capability. A comprehensive experiment conducted by an authority laboratory suggests the property of it perfectly meets the requirements of the national standard (GB7251.1 and GB7251.2). It is widely applied for its advanced performance and moderate price. It excellent performance in operation win the preference from lots of customers.