Damper / Spacer

1. Dampers

For aluminum-, al-alloy-, ACSR-, AACSR- and alumoweld conductors. Weights are cast onto the messenger wire.

Material:

Weights: cast iron, hot dip galvanized

Messenger cable: steel, hot dip galvanized

Clamp: aluminum-alloy, forged

Bolt: steel，hot dip galvanized

Vibration damper 4R stockbridge FR Damper

FR vibration dampers effectively prevent fatigue damage to conductor and static wires caused by wind-induced Aeolian vibration.

The FR concept improves on the design of the basic Stockbridge damper, significantly increasing the efficiency of converting wind-induced energy into heat.

The improved design employs unequal weights on messengers of unequal length. This configuration doubles the number of resonant peaks from two generated by the old-style Stockbridge damper to four in the improved FR.

These additional resonant peaks create an envelope of dynamic response that protects the conductor through the entire range of dangerous vibration frequencies.

2. Vibration damper 4R Stockbridge FR Damper (Continued)

FR damper Installation instructions for vibration dampers

3. Dogbone Vibration Damper

The Dogbone vibration damper FDZ is an advanced and completely new form of the accepted “Stockbridge” dampers. In addition to the two ranges covered and by virtue of the weight design and positioning on the messenger, we are able to increase the energy absorption of the damper by applying a torsional stress to the messenger. The damper is secured to the conductor by the Preformed retaining rods. This securing method has several advantages:

1.    No concentrated radial stresses are set up under the clamp.

2.    The complete elimination of dampers “wandering” up or down the line and causing conductor damage.

3.    Installation or removal may be carried out, without shut-down of the line, by hot stick application. The design completely eliminates any moisture build up and is therefore again superior to the conventional damper as far as corrosion is concerned. The neoprene pad between damper and conductor offers the conductor protection from abrasion from the damper clamp at the attachment point. tests have shown that it is more efficient than the Stockbridge type dampers. The retaining rods are made from our usual high grade aluminium alloy performed Armour used on all preformed fittings.

Material:

The clamp : high grade aluminium alloy.

Bolts and plate: steel.

The messenger : 19 strands of high stranded galvanized steel,

The weights : high grade zinc alloy.

4. Spacer dampers

The TANHO Spacer Dampers for Twin, Tri, Quad and Hex Bundles feature elastomer damping elements engineered to absorb maximum energy. This design provides the greatest possible resistance to conductor fatigue by eliminating the need for additional vibration dampers. The design was developed maintaining a light overall weight and exceptional performance. As such, this design is more robust and is well suited for areas where traditional spacer dampers have experienced premature performance problems or failures. Spacers are designed to maintain specified subconductor spacing. Furthermore they are designed to withstand the forces and movements caused by transient conditions such as short circuit differential icing and wind loading, without either causing damage to the subconductors or sustaining damage themselves. The clamp design was developed specifically to eliminate the variables involved with other types of fasteners. When properly installed it exerts a positive vibration proof grip on the conductor. Correct installation is easily verified from the ground. The spacer is flexible enough to allow some longitudinal movement between subconductors, and yet rigid enough to restrain the subconductors under adverse conditions. The range of spacers are designed to accommodate conductor sizes and all bundle configurations. Although the elastomer cushioned housing is designed to minimise conductor damage, vibration dampers must be used on lines subjected to aeolian vibration.

Flexible Spacers for horizontal and vertical twin bundles

The FJQ Spacers for aluminium-, al-alloy-, ACSR-, AACSR- and alumoweld conductors. It consist of two movable clamps which are linked with a elastomer lined strap. The clamps are made of two clamp halves which are connected by a steel bolt, to give them optimum movement in all directions in case of relative movements of the conductors of the bundle. An elastomer lined clamp that minimises damaging static compressive stresses onthe conductor while providing high slip strength. The clamp action makes this spacer easy to use with the clamp being fastened by the action of the locking pin. This method of clamping ensures that the clamp is always properly fastened, with a controlled amount of force exerted through the rubber onto the conductor. And it simple to install and will shipped fully assembled (no loose parts). The bolt provides a clear indication that the proper installation torque has been achieved (no special tools required).

Materials:

Clamps: high strength aluminium alloy.

Strap: steel, hot dip galvanised

Clamp liner: an elastomer compound specially formulated for resistance to ozone, ultraviolet, weathering, high and low temper ature variations and compression set.

Linking bolt: steel, hot dip galvanised

5. The Spacer Dampers

Spacer Dampers are recommended use for multi-conductor bundles with industry standard spacing. When the Spacer Damper is installed in accordance with recommendations for subsp an lengths, it constitutes a system which replaces conventional spacers and vibration dampers. Spacer Dampers will control both aeolian vibration and subconductor oscillation to levels recognised as acceptable within the industry and to the customers expressed needs. Spacer Dampers can accommodate torsional clamp arm movement of plus or minus 13 degrees, conical clamp arm movement of plus or minus 8 degrees, it owing to the properties of elastomeric damping elements.

Materials:

Frame: High strength aluminium alloy

Elastomer Liners: used with the Keeper, compounded for resistance to ozone, weathering, extreme high and low temperatures and compression set.