Patent ID: 7525048

Claim:
A protection device, of a guard-ring type, for the protection from the effects of the electric field, of the metal parts of chains of insulators of already mounted and operational high-voltage transmission lines, characterised in that it essentially consists of a fastening/support plate ( 10 ), anchoring means ( 11 , 12 ), to anchor said fastening/support plate ( 10 ) to a spacing yoke for the suspension of the conductors of the transmission line, said anchoring means ( 11 , 12 ) being mounted adjustably through said fastening/support plate ( 10 ) according to at least two degrees of freedom, and at least one guard ring ( 13 ), which may be anchored on said fastening/support plate ( 10 ) by way of steady fastening means ( 18 , 19 , 20 ).