ABB ACS880-31-025A-3 11 kW ultra-low harmonic drive. ABB ACS880-31-025A-3 is a current ACS880 ultra-low-harmonic wall-mounted drive rated 11 kW, 25 A, 380-415 V AC, frame R3, IP21. Its active supply unit and integrated low-harmonic filter keep total harmonic current distortion below 3% under nominal undistorted-network conditions without an external harmonic filter. It provides Direct Torque Control, Safe Torque Off and flexible industrial communications for demanding applications across industrial applications.