Three-phase supply voltage 200-240 V 50 Hz. EMC radio interference filter for frequency converters, for converters ATV630D30M3 - D37M3, Category C3, 160 m. Filter rated current 13.9 mA. The maximum lengths are only examples, as they may vary depending on the stray capacitance of the motors and cables used. When motors are connected in parallel, the length of all cables must be considered. The specified values depend on the rated switching frequency of the converter, which is determined by the rated size of the converter. Maximum length of shielded cable according to IEC/EN 61800-3 Category C2 (50 m). Maximum length of shielded cable according to IEC/EN 61800-3 Category C3. For stricter requirements, additional EMC input filters can be used. They reduce conducted emissions to values below Category C1, C2, or C3 of the IEC/EN 61800-3 standard. The use of these additional filters is only possible in TN networks (connection to neutral conductor) or TT networks (connection of the neutral conductor to ground). According to IEC/EN 61800-3, Annex D2.1, filters in IT systems (isolated or neutral grounded impedance) may result in continuous insulation monitoring only occurring in random operation.