Sensored bushing

Bushing for connecting a separable connector to a switchgear or to a transformer in a power distribution network of a national grid for distributing electrical power at medium or high voltages, the bushing comprising

• a) a bushing body comprising a solidified, electrically insulating casting material;
• b) a bushing conductor, embedded in the casting material, for conducting power at medium or high voltages into the switchgear or the transformer, and
• c) an integrated primary capacitor, operable in a high-voltage portion of a voltage divider for sensing a voltage of the bushing conductor,
• wherein the primary capacitor comprises a low-voltage electrode, a high-voltage electrode and a dielectric;
• wherein the high-voltage electrode is a section of the bushing conductor;
• wherein the low-voltage electrode is embedded in the casting material and comprises a circumferential wall surrounding the bushing conductor and forming a cavity;
• wherein the dielectric is formed by a portion of the casting material arranged in the cavity, and
• wherein the circumferential wall comprises a mesh of conductive wires forming a plurality of apertures between the conductive wires to allow the casting material radially outside the circumferential wall to be mechanically connected with the casting material in the cavity, wherein the bushing further comprises at least one low-voltage capacitor, comprised in a low-voltage portion of the voltage divider and electrically connected in series to the primary capacitor, wherein the at least one low-voltage capacitor comprises a discrete capacitor, embedded in the casting material.