Patent ID: 9099265
Filing Date: 2015-08-04
Classification: H01H

Abstract:
1. A high-voltage disconnection knife for outdoor use with air insulation, the knife consisting of: two L-shaped copper bases or flat plates with rounded edges, whose short section edge acts as a contact surface with the internal surface of the disconnection arms; two copper disconnection arms that have slots dividing into a number of longitudinal sections the ends of the arms placed in a parallel arrangement, assembled by means of four main transverse axes of stainless steel that secure and define the distance between them; a copper block for compensation of the additional and overheating current flow, located in the middle and on the internal surfaces of the disconnection arms; an aluminum spring of gradually reduced transverse section located in parallel on the external surface of the end of each disconnection arm, fixed to same by means of a pair of transverse stainless steel axes; a turning mechanism with a curved base of hook shape and a flat sill secured to a pair of transverse axes, it also includes a short axis of stainless steel that joins the base and the flat sill to form the turning mechanism, said axis functions as a rotation axis for the disconnection arms, the contact pressure between the ends of the arms and the base results from the elastic deformation of the assembly between the copper and the aluminum spring of gradually reduced transverse section at the ends of the disconnection arms.