The FRD damper is used to control or suppress wind-induced vibration of overhead wires. The FRD damper targets vibrations due to aeolian vibration; outside this range of amplitudes and frequencies, it is less effective. Aeolian vibration causes damaging fatigue in the cable. This leads to failure of the conductor strands.
Product Description
FRD Damper
FRD damper is used to control or suppress the vibration of overhead wires caused by wind. The FRD damper targets vibrations caused by aeolian vibration; it is less effective outside this range of amplitudes and frequencies. Aeolian vibration is nothing more than a winding-induced oscillation that has an amplitude of millimeters to centimeters and a frequency of 3 to 150 Hz. Aeolian vibration causes damaging fatigue of the cable. This leads to the failure of the conductor cores. It is connected at both ends of the transmission line span. The vibration damper has a length of steel carrier cable. Two metal weights are attached to the ends of the carrier cable. The central clamp, attached to the carrier cable, is used to install the vibration damper on the suspension wire.
Materials
· Spiral rods: aluminum clad steel
· Clamp: aluminum alloy
· Counterweights: galvanized steel
· Carrier cable: galvanized steel
Functions:
Control aeolian vibration on each line span within internationally recognized limits using a minimum number of blocks Maintain damping capacity over the entire ambient temperature range and for the entire expected service life of the line No corona discharge at maximum line voltage when installed on phase conductors Install and remove on energized lines; Require no maintenance for the entire expected service life of the line Provide adequate cable adhesion, preventing the weakening effect of vibration Ensure that individual components are protected from loosening during operation
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