DAMPING SPACER

ACCESORIES AND FITTINGS FOR CONDUCTORS

DAMPING SPACER2019-03-06T18:23:19+00:00

Damping spacer

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A damping spacer is able to disipate vibration energy on the sub- conductors by distorsion movement of some elastomer parts inserted between the clamp arm and the spacer body and these constitute a rotary mechanism or joint that allows a relative movement between both parts of the spacer, in particular and principally the rotation of the arm in relation to the rotary axis.

The more economical solution to increase the power capacity on the overhead lines is the increasing of the voltage. It makes necessary the use of big diameter conductors or simulate them by multiplying several conductors to maintain the electric field gradient on the proximity of the conductor standard diameter on a reasonable level the and avoid the losses because of the corona discharge, with the subsequent electromagnetic emissions. So, each phase will be constituted by twin, triple, quad or more bundle conductors.

To maintain the geometry of these bundles along the span and to avoid contact between sub-conductors an accessory consisting of a metallic body with some clamping devices to the sub-conductor bundle named space, is used. Consequently, the spacer has to support all the efforts due to its function, such as aeolian movements of the sub-conductors, in particular the aeolian vibration and sub-span oscillation, as well as the short-circuits effects without distorting the geometrical bundle nor damaging the conductor on the clamps.

The type of joints on the spacer clamps, if they exist, and their inertial characteristics can constitute a barrier to the vibration transmission along the sub-conductors and make the use of dampers completely inefficient on the ends of the span, increasing the risk of breakage by fretting fatigue, either on the clamps on the end of the span or on the spacers themselves. This problem could be solved by introducing dispersing articulations between the clamps and the spacer body and to optimise for this function the geometry and inertias, constituting a damping spacer.

A damping spacer is able to disipate vibration energy on the sub- conductors by distorsion movement of some elastomer parts inserted between the clamp arm and the spacer body and these constitute a rotary mechanism or joint that allows a relative movement between both parts of the spacer, in particular and principally the rotation of the arm in relation to the rotary axis.

The Technical Department of SAPREM will give, together with its dampingspacers, some indications on how to install them and a complete aeolianstudy on the line according to its parameters, on the characteristics of the spacers and the dampers, if they exist. In this way, the behaviour of the line on aeolian vibration and sub-span oscillation will be optimised.

Twin Damping Spacer (*) 400mm

Material: Aluminium Alloy (Clamp and Body); Hot Dip Galvanised Steel (Bolts and Nuts)

These Spacers give a distributed damping along the span. It depens on the parameter of the overhead line, stockbridge dampers should to be installed in adition to the spacers. Please, consult to SAPREM’s Technical Department for Damping Study.

If you want to know all the technical specifications, download the PDF document.

Twin Damping Spacer (*) 450mm

Material: Aluminium Alloy (Clamp and Body); Hot Dip Galvanised Steel (Bolts and Nuts)

These Spacers give a distributed damping along the span. It depens on the parameter of the overhead line, stockbridge dampers should to be installed in adition to the spacers. Please, consult to SAPREM’s Technical Department for Damping Study.

If you want to know all the technical specifications, download the PDF document.

Triple dumping spacer 450mm

Material: Aluminium Alloy (Clamp and Body); Hot Dip Galvanised Steel (Bolts and Nuts)

Please, consult to SAPREM’s Technical Department for Damping Study.

If you want to know all the technical specifications, download the PDF document.

Quad dumping spacer 450mm

Material: Aluminium Alloy (Clamp and Body); Hot Dip Galvanised Steel (Bolts and Nuts)

Please, consult to SAPREM’s Technical Department for Damping Study.

If you want to know all the technical specifications, download the PDF document.

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