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Spiral Vibration Damper

Spiral Vibration Damper reduces Vibration (the high frequency, low amplitude vibration caused by horizontal wind passing across the line. It is designed to be used on OPGW and conductors with an outside diameter less than 0.75".

Product Description

Spiral Vibration Damper

Spiral Vibration Damper, also known as helical vibration dampers, are used in the overhead transmission line industry to reduce the vibrations that occur on the conductor due to wind or other external factors. These dampers are typically made of a spiral-shaped metallic wire, which is wrapped around the conductor at regular intervals along its length.

The application of spiral vibration damper on transmission lines helps to reduce the amplitude of conductor vibrations, which in turn reduces the stress on the line, and prevents damage and failure of the transmission system. These dampers can be installed on overhead transmission lines for both AC and DC systems.

In addition to reducing conductor vibration, spiral vibration dampers also provide protection against galloping, which is a large-amplitude, low-frequency vibration that can occur when the wind blows across the conductor. This phenomenon can cause significant damage to the transmission line and is a major concern for power companies.

Spiral vibration damper is designed to work over a wide range of frequencies, and they can be customized to suit specific application requirements. They are typically installed at regular intervals along the length of the conductor, and the number and spacing of the dampers depend on the expected wind speed, the span length, and other factors.

FL Spiral Vibration Damper

Features:

A, one type shock absorber. It is very useful for a little diameter high frequency transmission line and optic fiber cable.

B, gripping section make sure that the cable don't move, the damping section provide mechanical interaction between damper and conductor.

C, Easy installation.

D, Eliminates damage caused by wind and god vibrations

E, Reduces overall vibration of bare conductors

F, Made of weather-resistant, non-corrosive plastic

H, Large spiral damping section for cables, with smaller clamping section to gently clamp conductors

I,Marked conductor ranges and color coded to indicate cable diameter size ranges

J, Available in standard and high quality span lengths

Applications.

Distribution Range
Conductors between 0.250 in. and 0.500 in. outside diameter
Spans over 800 feet

Parts List

Standards - Applies to. Bare conductors, shielded wires and OPGW
Explanatory notes. (1) When the cable diameter is 0.461" and below, a maximum of three SVDs can be installed in one position.(2) On cables larger than 0.461" diameter, only two SVDs need to be combined in order to obtain the best damping performance.

FL Spiral Vibration Damper

Order Information:

Confirm the configuration quantity of every helical vibration rod according to the span in the transmission line.:

number

Span L(m)

Configure of each span (root)

1

100 not less than L less than 250

2

2

250 not less than L less than 500

4

3

500≤L<750

6

4

750≤L<1000

8

Spiral Shock Absorber Specifications Model Parameter table:

Model

For cable diameter(mm)

Grip length L1 (mm)

Total length L2(mm)

Quality(kg)

FL-10

9.1-11.0

300

1350

0.32

FL-12

11.1-13.0

300

1350

0.34

FL-14

13.1-15.0

300

1350

0.41

FL-16

15.1-17.0

300

1500

0.49

FL-18

17.1-19.0

300

1500

0.56

FL-20

19.1-21.0

300

1500

0.58

Note: meaning of letters and numbers: FL-spiral vibration damper; "-" after suitable cable diameter.

How to Install a Spiral Vibration Damper (SVD)

Spiral Vibration Damper needs to be placed in the proper location to ensure success. They should be mounted near but not in contact with the following support devices (leave approximately 6-8 inches of clearance)

Armor bars
Cable suspension clips
dead center
or other electrical hardware.
SVD installation is easy and follows more or less the same procedures of all manufacturers.

Step 1: Properly install the ADSS (All Dielectric Self-Supporting) cable between poles or any fixed points along the line. This should be done according to the manufacturer's instructions.

Step 2: Place the SVD close to the ADSS cable, with the grip end away from you and the damping area close to you. This is done to determine the proper clearance to allow before beginning installation.

Note: As previously stated, the SVD should not touch the armor bar or any hardware at the end. There should be approximately 8 inches of clearance from the end of the hardware to the SVD.

Step 3: Install the SVD by quickly wrapping the wire from the gripping end or tighter end. Continue until the entire length of the SVD wraps around the cable.

Spiral shock absorber installation diagram:

FL Spiral Vibration Damper

FL Spiral Vibration Damper

FL Spiral Vibration Damper

FL Spiral Vibration Damper

FL Spiral Vibration Damper

What is the purpose of Spiral Vibration Damper?

Spiral Vibration Dampers are used to absorb vibrations from machines, pedestrians, etc., primarily to reduce the noise associated with such vibrations and to obtain a more comfortable environment.

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ADSS Spiral Vibration Damper: Everything You Should Know

What Is The Difference Between OPGW Cable And ADSS Cable?

 

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