... current according to instruction current, the main circuit adopted PWM converter.Technical Features:Compensate any order harmonic with variable amplitude ... many harmonic and reactive power sources. Adopt full-bridge PWM converter to generate compensation current, the power unit is ... interference for production line. Wanlida Active Filter/400V/4L/50A,100A,150A,200A,250A,300A,350A,400A, 450A, 500A, 550A, ...