Filter

Filter with three phases comprising for each phase a respective input terminal, a respective output terminal and a respective capacitor, wherein for each of the three phases the input terminal is electrically connected via a connection point to the output terminal, wherein the connection points of the three phases are electrically connected via the respective capacitors in star or delta form, wherein the filter comprises a housing containing two coil blocks, wherein the housing comprises a first side and a second side opposite the first side, wherein the two coil blocks are arranged along a line between the first side and the second side, wherein the housing tapers from the first side towards the second side, wherein the housing comprises a third side for fixing the filter on a wall or for fixing the two coil blocks and a fourth side opposite the third side, wherein the distance between the third side and the fourth side decreases in the direction toward the second side, wherein the two coil blocks are selected from two of the following three coil blocks:

• an input-side coil block having three input-side coils, wherein for each of the three phases one of the three input-side coils is connected between the connection point and the input terminal,
• a secondary coil block having three secondary coils, wherein the connection points of the three phases are electrically connected via the three secondary coils and the three capacitors in star form or in delta form or in a combination of a star and delta form, and
• an output-side coil block having three output-side coils, wherein for each of the three phases one of the three output-side coils is connected between the connection point and the output terminal.