ABB ACS880-34-503A-5 355 kW ultra-low-harmonic drive module. ABB ACS880-34-503A-5 is a current ACS880 ultra-low-harmonic drive module rated 355 kW and 503 A at 380-500 V AC, using R11. It integrates active-front-end harmonic mitigation for typically below 3% input-current distortion under nominal network conditions. ABB Direct Torque Control, Safe Torque Off and flexible industrial communications support demanding crane, mining, metals, cement, marine, oil and gas, test-bench and process applications across industrial applications.