Two Split Spacer Damper
Spacer damper
Spacer Dampers for Quad-Bundle Conductors (2)
Spacer damper
Spacer damper
Spacer damper
Spacer damper
Two Split Spacer Damper
Spacer damper
Spacer Dampers for Quad-Bundle Conductors (2)
Spacer damper
Spacer damper
Spacer damper
Spacer damper
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Spacer damper

Spacer dampers are used on high voltage overhead transmission lines to maintain conductor separation and control aeolian vibration. They dissipate the energy introduced in the conductor and help to resist short circuit current and mechanical loads.

The structure of the spacer damper includes formed-wire outer rods (spacers) which increase the conductor surface area enhancing heat dissipation. This helps to protect multi-conductor bundle systems from damage caused by motion and fault currents.

Twin, triple, or more bundle conductors are often used to increase power capacity on overhead lines. In such cases, it is necessary to keep the bundles spaced out along the span and to prevent contact between sub-conductors using space dampers.

The spacer prevents aeolian movements of the sub-conductors and short-circuits effects without distorting the geometrical bundle or damaging the conductor on the clamps. The aeolian movements usually occur due to wind flow and can cause damage to the conductor.

Spacer dampers are a cost-effective solution that helps to ensure durability of the conductors and prevent interruptions in supply.

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Two Split Spacer Damper Drawing

Two Split Spacer Damper Drawing

Model
Applicable Conductor Section Area(mm²）
Main Dimension
Axial Load(≥kN)
A
R
L
FJQ(Z)-204
185-240
60
11
200
7
FJQ(Z)-205
300-400
60
14.5
200
10
FJQ(Z)-206
500-630
60
18
200
10
FJQ(Z)-404
185-240
60
11
400
7
FJQ(Z)-405
300-400
60
14.5
400
10
FJQ(Z)-406
500-630
60
18
400
10
FJQ(Z)-455
300-400
60
15.4
450
10

Spacer Damper Drawing

Model
Suitable Conductor
L
Weight
FJZ-40240
LGJ-240
400
3.3
FJZ-40300
LGJ-300
400
3.3
FJZ-40400
LGJ-400
400
3.3
FJZ-50500
LGJ-500
500
4.3
FJZ-50630
LGJ-600
500
4.3

Drawing of Spacer Dampers for Quad-Bundle Conductors

Type
Applicable Conductor
Main Dimension
Weight(kg)
L
JZFD4-45300
23.0-24.5
450
7.5
JZFD4-45300J
24.5-26.0
450
7.5
JZFD4-45400
26.0-28.0
450
7.5
JZFD4-445400J
28.1-29.5
450
7.5
-
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Frequently Asked Questions

Types of Spacer Dampers

  • Nutcracker clamp type: this type of damper is typically rubber lined and boltless.
  • Cantilever clamp type: This type typically has a bolt fastening mechanism and is usually attached directly to the conductor.
  • Dampers are also available with different numbers of spacers to suit different applications including twin, triple and quad spacer dampers with two, three and four spacers respectively. The higher the number of spacers the greater the damping performance and stability.

Key Features of Spacer Dampers

  • Maintain spacing between sub conductors.
  • Control levels of aeolian vibrations and sub span oscillations to keep them within accepted safety limits.
  • Preserve mechanical, elastic and damping properties for the lifetime of the transmission line
  • Allow the sub conductors to move in any direction without damage to sub conductor strands or spacer components.
  • Do not require any maintenance.

Components of Spacer Dampers

The structure of spacer dampers includes conductor clamps and a connecting frame with damping elements.

The damping elements are made using elastic macro molecular elastomers that have high energy absorption capacity. These elements enable the spacer damper to efficiently prevent harmful vibrations.

The clamps serve as the fastening system of the spacer damper. They provide a firm grip connecting the damper to the conductor. The clamps are designed to be light weight in order to ensure that they remain mobile at the highest frequencies of aeolian vibrations.

How to install a Spacer Damper?

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