Beijing Power Equipment Group was built in 1952, which is subordinate to the North China Grid Company Limited, is the first large state-owned enterprise engaged in the manufacturing and repairing of power equipment in China's electric power system. China's State Bureau of Statistics listed BPEG in China's top 500 industrial machinery enterprises, ranking No. 109 in 1993. Metal-enclosed bus is one of the main products of our plant. Since 1978 the first set of metal-enclosed bus was successfully developed, we have designed and manufactured more than 820 sets of metal-enclosed bus and its associated facility for hydro, coal, nuclear power generating plants home and abroad. The products have been operating well, and some even more than 30 years. Practice shows that our products have the characteristics of installed conveniently, operated safely and quality reliably. Our products have been identified by the Ministry of Electric Power and then started to produce in 1986. Meanwhile, we drafted the state\\\\\\\'s existing (GB/T8349-2000) consigned by the National Bureau of Standards. Due to excellent product design and reliable operation, our products were awarded as Beijing quality products and national quality products in 1987, and were recommended by the Ministry of Electric Power as the preferred domestic manufacturer of metal-enclosed bus for many years.