Patent ID: 7031135

Claim:
A capacitor of high thermal stability for carrying out measurements on a gas-insulated high-voltage line, comprising: a high-voltage electrode extending in a longitudinal direction, a cylindrical printed circuit coaxially surrounding said high-voltage electrode, said cylindrical printed circuit comprising an electrically conductive track forming a low-voltage electrode, and a frame comprising a cylindrical inside surface coaxially surrounding said cylindrical printed circuit held by said frame, wherein said cylindrical printed circuit is slit along a generatrix of the cylinder that it forms and said frame comprises guide means for holding said cylindrical printed circuit near the cylindrical inside surface and allowing said cylindrical printed circuit to expand along said cylindrical inside surfaces, said capacitor of high thermal stability further comprising a plurality of fixing points for fixing the cylindrical printed circuit to the cylindrical inside surface, said fixing points being distributed along another generatrix of the cylinder formed by the cylindrical printed circuit symmetrical to the generatrix along which the cylinder is slit with respect to the longitudinal direction.