Suitable for power plants, substations, factories and mines enterprises power user communication fifty hz, rated voltage 380 v, rated current to 3150 a of the power distribution system, as power, lighting and power distribution equipment of electric power conversion, distribution and control with. This product has high breaking capacity, dynamic thermal stability, electrical solutions agile, combination convenient, chained, practical strong, novel structure, protection level higher characteristic. Can be used as low voltage switchgears renewal of product use.