On the basis of BSM3 busway, we have researched and developed BSM3-1 series based on our long-term dedication in busway industry and clients’ demands through tests. The phase line is copper bar and both null line and earthing line are aluminum bars. While satisfying performance requirements, they can also reduce costs. The products have passed national compulsory CCC certification and totally conform to GB7251.1 and GB7251.6.