Sensored insulation plug for being inserted into a rear cavity of a medium-voltage or high-voltage separable connector in a power distribution network of a national grid, and operable to insulate a connection element of the separable connector on an elevated voltage and to sense the elevated voltage, the sensored insulation plug comprising a) a plug body formed by a solidified insulating material, and b) a primary capacitor, operable as a high-voltage capacitor in a voltage divider for sensing the elevated voltage, the primary capacitor having i) a high-voltage electrode for direct electrical connection to the elevated voltage; ii) a sensing electrode of a tubular shape, embedded in the plug body, arranged around the high-voltage electrode, and comprising a mesh of conductive wires forming a plurality of apertures between the wires to allow portions of the insulating material on opposite sides of the mesh to be mechanically connected with each other by insulating material in the apertures while the insulating material solidifies and thereafter; iii) a dielectric formed by a portion of the insulating material arranged between the sensing electrode and the high-voltage electrode, characterized in that the mesh is a deformable mesh, adapted to be deformed by insulating material in liquid state flowing around the mesh before solidification of the insulating material. a) a plug body formed by a solidified insulating material, and b) a primary capacitor, operable as a high-voltage capacitor in a voltage divider for sensing the elevated voltage, the primary capacitor having i) a high-voltage electrode for direct electrical connection to the elevated voltage; ii) a sensing electrode of a tubular shape, embedded in the plug body, arranged around the high-voltage electrode, and comprising a mesh of conductive wires forming a plurality of apertures between the wires to allow portions of the insulating material on opposite sides of the mesh to be mechanically connected with each other by insulating material in the apertures while the insulating material solidifies and thereafter; iii) a dielectric formed by a portion of the insulating material arranged between the sensing electrode and the high-voltage electrode, characterized in that the mesh is a deformable mesh, adapted to be deformed by insulating material in liquid state flowing around the mesh before solidification of the insulating material. i) a high-voltage electrode for direct electrical connection to the elevated voltage; ii) a sensing electrode of a tubular shape, embedded in the plug body, arranged around the high-voltage electrode, and comprising a mesh of conductive wires forming a plurality of apertures between the wires to allow portions of the insulating material on opposite sides of the mesh to be mechanically connected with each other by insulating material in the apertures while the insulating material solidifies and thereafter; iii) a dielectric formed by a portion of the insulating material arranged between the sensing electrode and the high-voltage electrode, characterized in that the mesh is a deformable mesh, adapted to be deformed by insulating material in liquid state flowing around the mesh before solidification of the insulating material.