3-Phase AC Filters / DC Filters. 1-Stage Filter for 3-Phase Systems. 3 phase line filter with standard attenuation. Available as high voltage filter (up to 520 VAC). High symmetrical and asymmetrical attenuation In the frequency range from 10kHz up to 300MHz. Standards: IEC 60939; UL 1283, edition 5 and CSA 22.2 No. 8-M1986 @ Ta 75°C for filter types with excellent attenuation up to 110A and high attenuation filter (L-) types. UL PENDING for filter types with excellent attenuation with rated current >110A and high voltage filter (-I) types. Approvals: VDE Certificate Number: 40004666 + 40004673; UL File Number: E72928. Applications: Voltage rating 480 and 520 VAC for world wide acceptance. Protection against interference voltage from the mains. For photovoltaic systems and industrial applications. Suitable for use in equipment according to IEC/UL 60950.