Abstract: A space damper for 4-cable bundles of overhead power transmission lines is disclosed, comprising a framework (10) where—from four support arms (20a-20b) depart, at the distal ends of which there are provided clamps for fastening electric cables, said arms (20a-20c) being constrained to the framework (10) through respective dampening hinges (30a-30c), wherein the spacer damper is configured so that the vertical, natural-mode frequencies thereof are higher than the corresponding horizontal, natural-mode frequencies thereof.

Abstract: A space damper for 4-cable bundles of overhead power transmission lines is disclosed, comprising a framework (10) where—from four support arms (20a-20b) depart, at the distal ends of which there are provided clamps for fastening electric cables, said arms (20a-20c) being constrained to the framework (10) through respective dampening hinges (30a-30c), wherein the spacer damper is configured so that the vertical, natural-mode frequencies thereof are higher than the corresponding horizontal, natural-mode frequencies thereof.

Abstract: The present invention relates to a clamp and a spacer for bundle-shaped wires of high-voltage electric lines, as well as a relative mounting kit. The clamp possesses an arm for fastening to wires, at the free end of which two fixed jaws are formed. The second jaw being movable through disengageable tightening means, both jaws being provided with opposite saddles for the housing of wire, wherein the second moving jaw has a first end mounted rotating on a pin, carried by said fastening arm in a position coinciding with a first end of the first jaw. The tightening includes a tie rod having an end mounted rotating on the jaw and a distal end constrained through a constraint pin to a cam lever.

Abstract: Device for the protection from effects of an electric field, of the metal parts of chains of insulators of already mounted and operational high-voltage transmission lines includes: a fastening/support plate; anchoring elements to anchor the plate to the suspension yoke of the conductors of the transmission line, the anchoring elements being adjustably mounted on the plate according to at least two degrees of freedom; and at least one guard ring, which may be anchored on the plate with fastening elements. The plate has an upturned-U cross-section and its upper surface is formed by geometrically coupling with the lower surface of the suspension yoke. The anchoring elements include a pair of arms articulately, mounted on the plate; such articulation including, for each arm, a pin pivotally, mounted within seats formed in the plate perpendicularly to the longitudinal axis thereof, and a pair of holes running through the pin.

Abstract: Device for the protection from effects of an electric field, of the metal parts of chains of insulators of already mounted and operational high-voltage transmission lines includes: a fastening/support plate; anchoring elements to anchor the plate to the suspension yoke of the conductors of the transmission line, the anchoring elements being adjustably mounted on the plate according to at least two degrees of freedom; and at least one guard ring, which may be anchored on the plate with fastening elements. The plate has an upturned-U cross-section and its upper surface is formed by geometrically coupling with the lower surface of the suspension yoke. The anchoring elements include a pair of arms articulately, mounted on the plate; such articulation including, for each arm, a pin pivotally, mounted within seats formed in the plate perpendicularly to the longitudinal axis thereof, and a pair of holes running through the pin.

Abstract: The invention relates to a vibration damper for suspended cables, particularly for electric conductors of overhead high voltage lines, comprising a messenger cable fixed by its central part to a clamp of connection to the conductor, and two counterweights fixed to the messenger cable. Each of the counterweights is formed of a bar element, having a constant section throughout most of its length and being obtained by cutting to size a bar of indefinite length.

Abstract: The invention concerns a damping spacer for bundle conductors of high-voltage electric lines, which comprises a stiff central body (1), at least two connecting clamps (3) each for anchoring to a respective conductor of the bundle, each clamp having a rigid extension (2), and at least one springing hinge element for connecting the extension (2) to the stiff body (1). Rigid arms (4), carrying at their ends inertial masses (5), are fixedly connected to the central body (1), said masses being so arranged that their barycenters are far from the barycenter of the central body (1), beyond the axes of said springing hinges.