Braking resistor, for ATV930U22M3 drive. Reference values for a heavy braking cycle (lifting applications). Power VA 3.4 kW, protection class IP20, resistance 60 O at 20 °C. Supply voltage 200-240 V or 380-480 V 50/60 Hz. Load factor for resistors The value of the average power that can be dissipated from the resistor into the housing at 50 °C. Determined for a load factor during braking that corresponds to the majority of common applications. Heavy overload 54 s braking at a braking torque of 1 Tn and 6 s braking at a braking torque of 1.65 Tn for a cycle of 120 s. Number required per drive 1.