* All Chinese setting interface is optional * Wide voltage input: 3 phases 323-528V * Quick start up and shut down (A4 series 0.01s quick start up and shut down) * Motor speed tracking restart, smooth without impact * Low frequency high torque: closed loop vector starting torque: closed loop vector starting torque 0.00Hz 180% It is widely used in ceramic cement, power power plants, glass, packaging, printing, cable, water treatment and other transmission and fan control