1) Preformed vibration damper consist of big & small damper, galvanized steel stranded conductor, aluminum alloy clamp and armor rod. When the wire is vibrating, the damper will vibrate with is, and make friction to eliminate the energy. The wire vibration will be restrained.

2）Preformed vibration damper could be directly installed on conductor, normal earth wire or OPGW.

1) preformed vibration damper is designed with big and small dampers and the distances between suspension point and steel stranded wire are different. This structre make the vibration damper have four inherent frequency, from several Hz to dozens Hz, even hundreds Hz.
2) The grip strength of clamp to wire is distributed even, no concentrated stress.
3) Simple structure, easy installation. lt could installed without special tool.
4) The material of clamp and armor rod is aluminum alloy, good energy sawing function.
5）Preformed vibration dampers have 4 series: FSD-1, FSD-2, FSD-3, FSD-4, so it has a wide application rang.