The 4P-SA series of high-current three-phase four-wire power filter, in line with the needs of the majority of three-phase four-wire wiring, especially high-attenuation filter performance and easy installation of its features. This series of filters to install design, especially considering the high attenuation performance required to have symmetry in the line impedance load or load asymmetry. Noise suppression range is in full compliance with EN133200, UL1283, IEC60950 and VDE 0 565. They are very suitable for the standard requirements of EN55011 CLASS A