Introduction YB-12 series of prefabricated substation our company to meet the needs of the urban network construction, designed and developed a series of products. The series is one of the medium-voltage switchgear, transformers, low voltage power distribution equipment combinations according to certain wiring scheme into one of complete power distribution equipment. This series of prefabricated substation is suitable for 12KV, rated frequency 50Hz three-phase AC system, the capacity of 2500kVA and the following configuration in residential areas, commercial hotels, large construction sites, high-rise buildings, industrial and mining enterprises and temporary construction sites, for use in Ring Power, also applies to radiation terminal power supply.