HIGH-FREQUENCY FILTER ASSEMBLY

The present disclosure relates to a filter assembly for a high-voltage system, a bushing for a high-voltage system and a gas-insulated switchgear (GIS). The filter assembly includes a casing adapted to contain an electrically insulating medium. The casing includes a main tubular section and a side tubular section connected to the main tubular section and arranged to intersect the main tubular section. Further, an end of the side tubular section distant from the intersection with the main tubular section is sealed. The end of the side tubular section includes an electrically conducting material. The filter assembly includes also a conductor arranged within the main tubular section. The conductor extends along a longitudinal direction of the main tubular section and is adapted to convey a power at high voltage. In the present inventive concept, the capacitor is arranged within the side tubular section and is electrically connected between the conductor and the sealed end of the side tubular section. The capacitor extends along a longitudinal direction of the side tubular section.