... fouling,thermal efficiency, less energy consumption. FeaturesMedium-frequency power 1.Designed power 350KW,frequency 1000-2500Hz. 2.Equipt with HMI of ... controlled rectifier and full-bridge control parallel inverter. 5.Medium-frequency transformer can be tapped,variable turns ratio, parallel. 6. ... ,hydraulic type former bending arm and after clambing bending. new Medium-frequency pipe bending equipment