Features: advanced design concepts, design scheme of large computer, three-dimensional composition, short-circuit force, electromagnetic simulation, modern chemical equipment, first-class processing technology, scientific and efficient management team, providing high-quality products. The product has the advantages of energy saving, high efficiency, low noise, strong overload capability, two winding current harmonic distortion characteristics of low frequency. The high and low pressure side is equipped with a high precision current transformer, which can meet the requirement of high sensitivity differential protection. At the same time, with the import and export of insulator, bracket, wire, lead wire and the transformer to take over the soft connection buffer structure, greatly reducing the lead wire on the tension of the transformer. Meet photovoltaic, wind SVG power supply equipment, has been Guanfan applied to domestic and foreign new energy projects.