Output filter du/dt Three-phase supply voltage 200-240 V. Du/dt output filter for frequency converter, IP00, for ATV630D55M3 - D75M3 converters. Rated current 305 A, max. switching frequency 2.5 kHz. The filters operate in a switching frequency range between 2 and 8 kHz. The values indicated depend on the nominal switching frequency of the converter. This frequency depends on the nominal size of the converter. These cable lengths are only examples as they vary according to the application. They are for motors in accordance with IEC 6034-25 and NEMA MG1/31.2006. If the filter is used with ATV650U07N4/N4E - D90N4/N4E converters, it must be installed in a separate cabinet to ensure protection class IP 55. Shielded cable (300/984 m).