ABB ACS880-31-156A-5 90 kW ultra-low harmonic drive. ABB ACS880-31-156A-5 is a current ACS880 ultra-low-harmonic wall-mounted drive rated 90 kW, 156 A, 380-500 V AC, frame R8, 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.