The aluminium alloy used is chosen with low content of copper to avoid corrosion due to electrolytic couple and it is thermally treated to give it the necessary plasticity for a good and homogeneous compression. These clamps are connected to a jumper loop, which permits electrical continuity between adjacent spans.
The term damping system applies to the complex of the damping units suitably correlated and designed to reduce the vibration and in general the effect of the wind action on the conductors. The wind-induced motions ca be extremely dangerous for the integrity of the conductors. For this reason, it is very important that the damping systems are designed with great care.
Armour rods technology for overhead lines is, at present, well established in many Countries and represents a valid alternative to conventional fittings. Armour rods provide undoubted advantages for the mechanical protection of the cables and are available for a wide range of applications.
Hardware components are manufactured in accordance with the requirements of the Italian Railway Company using steel bars and plates as well as other selected materials. Steel products are hot formed and hot dip galvanized for corrosion protection during the whole expected lifetime.
These products are designed to minimize the loss due to the electrical resistance, guarantee the best protection against corrosion and withstand the mechanical load due to the electromechanical force that can be developed during short circuits between the substation bars.
The companies able to deal with different sectors of the market will result more competitive in the Italian industrial panorama. NES, pursuing the diversification of its activity, has developed, in the last years, a line of fittings for overhead cables for medium and low voltage.