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Spacers, Spacer Dampers, and Dampers

Spiral Vibration Damper

Description

MaterialsSpiral Vibration Dampers are manufac-tured from solid polyvinyl chloride heli-cally formed. It is non-corrosive and hasa surface hardness which does notabrade the conductor. Designed to beused in ambient temperatures rangingfrom -40 degrees to 150 degrees F, ithas a flow temperature of about 200degrees F, U.V. stabilized with titaniumdioxide.

IdentificationEach unit is either indelibly markedalong its entire length with the catalognumber and the conductor diameterrange or color coded on its end.

Gripping and damping sectionsThe smaller helix is designed to grip theconductor. The larger helix is designedfor damping.

Operational theoryTo provide the action/reaction motionthat opposes the natural vibration of aconductor, the damping section of theSpiral Vibration Damper is helicallysized to provide mechanical interactionbetween damper and conductor.

General RecommendationsThe Spiral Vibration Damper is consid-ered the most effective method ofreducing high frequency aeolian vibra-tion on conductor and static sizes under3/4" diameter.

All Tyco Electronics’ damping devicesare designed for the single purpose ofreducing vibration. This unitary functionis entirely different from that of protect-ing against: (1) stress concentrations, (2) fretting or abrasion and (3) arc-overburning.

Because of this, damping devicesshould be considered only as supple-mental to Longspan Ties, DistributionTies, Side Ties, Spool Ties, Armor Rods,Line Guards, Heliformed Support Units,Credel Support Units, or other hardwareat tangent supports. Spiral VibrationDampers are also used as a supplemen-tal protection at dead ends.

The degree of protection needed on aspecific line depends upon a number offactors such as line design, tempera-ture, tension, exposure to wind flow andvibration history on similar constructionin the same area. As a general guide,

the following recommendations may be adopted to the specific conditions.

Spiral Vibration Dampers should be givenserious consideration when distributionspans exceed 350 feet and/or 15% ten-sion at 60 degrees F. Spiral VibrationDampers should be used on conductorsbetween .174 inches and .760 inches.O.D. in areas experiencing or having ahistory of vibration. These conductorsizes are normally associated with tietopinsulators and rural construction.

InstallationIt is recommended that one SpiralVibration Damper be installed on bothsides of the support point about onehand’s width from the ends of the ArmorRods or the hardware.

Overhead shield wiresSpiral Vibration Dampers are exception-ally effective against high frequency aeo-lian vibration of EHS or Alumoweld shieldwires. In special cases it is sometimesrecommended that a combination withDogbone dampers at one span end withat least one Spiral Vibration Damper atthe other end will adequately reducevibration amplitudes of all frequencies toacceptable levels.

OptionAvailable for ADSS cable.

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Spacers, Spacer Dampers, and Dampers

Spiral Vibration DamperBare Conductor and OPGW Fiber Cable

Selection Information

SVD 0441 .174-.249 #6, 6/1 .500 .49 0.75 8.5 50(4.41 - 6.34) #4, 7W AAC, CU (1245)

8A, CW/CU3 #9AW

SVD 0635 .250-.326 #4, 6/1, 7/1 .500 48.5 0.75 8.5 50(6.35 - 8.29) #4, 7W Alum. Alloy (1245)

#2, 6/1, 7/1#2, 7W AAC, CU5/16” -7 STR. GALV.3 #8 AW

SVD 0830 .327-.461 #1, 6/1 .500 53 0.76 10 50(8.30 - 11.72) 1/0, 6/1 (1350)

1/0, 7W-19W AAC, CU2/0, 6/1, 7/12/0, 7W-19W All Alum.101.8, 12/73/8”, 7/16”-7 STR. GALV.7#8AW

SVD 1173 .462-.563 3/0, 6/1 .500 53 0.76 10 50(11.73 - 14.32) 3/0, 7W-19W AAC, CU (1350)

4/0, 6/14/0, 7W- 19W AAC, CU134.6 12/71/2” -7 STR. GALV.7 #6 AW

SVD 1432 .564-.760 266.9,18/1 .750 66 1.75 13 10(14.33 - 19.30) 266.8, 7W-19W AAC (1680)

336.4, 18/1, 36/1336.4, 19W-37W AAC397.5, 18/1, 36/1397.5, 19W AAC19 #9 AW

GripCatalog Diameter Nominal Diameter Length Weight Length StandardNumber Range (mm) Conductor Size Inches Inches Pounds Inches Package

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Spacers, Spacer Dampers, and Dampers

Spiral Vibration DamperADSS Cable

Description

Diameter Rod CartonCatalog Range Length Weight Std.Number mm in. mm in. kg lbs. Pkg.

ADSS Cable

PSVD 0441-BE 4.42 - 6.34 .174 - .249 1245 49 15 33 50PSVD 0635-BE 6.35 - 8.29 .250 - .326 1246 48 15 33 50PSVD 0830-BE 8.30 - 11.72 .327 - .461 1350 53 15 33 50PSVD 1173-BE 11.73 - 14.32 .462 - .563 1350 53 15 33 50PSVD 1432-BE 14.33 - 19.30 .564 - .760 1680 66 8 17 10PSVD 1930-BE 19.32 -22.25 .761 - .876 1680 66 8 17 10PSVD 2225-BE 22.26 - 25.40 .877 - 1.00 1680 66 8 17 10PSVD 2565-BE 25.41 - 30.48 1.01 - 1.20 1680 66 8 17 10

Span Lengthmm feet PSVD Placement0 - 75 0 - 225 0 Not required75 - 200 226 - 600 2 One on each side of support201 - 400 601 - 1200 4 Two on each side of support401 - 800 1201 - 2400 6 Three on each side of support

General RecommendationsSpiral Vibration Dampers are consid-ered the most effective means of reduc-ing damaging levels of aeolian vibrationto acceptable limits on ADSS cables.The PSVD is an interference typedamper designed to attenuate vibrationamplitude by impact with the cablewithin its dampening section.

InstallationFor final installation, the “GrippingSection” should be at least 6" from anycomponent of the cable’s suspension ordead end device.

General Guideline for the Numberof Dampers RequiredThe degree of protection needed on aspecific line is dependent upon linedesign, temperature, tension, exposureto wind flow and vibration history onsimilar construction. The following recommendations may be used as a general guide only. Contact TycoElectronics for specific recommenda-tions to determine product application,placement, and quantity.

Damping Section7

Gripping7Section Both ends are ball-ended

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Spacers, Spacer Dampers, and Dampers

Vibration Damper Recommendation Request Form for Conductor and Static Wires

Fax Information to Tyco Electronics Fax: 1-800-527-8350

Requester’s Name Telephone#

Company Fax #

Address

Project Information

Line ID Line Voltage (kV)

Phase Conductor

Size Name Conductor Configuration (Single, double, triple, etc.)

Suspension Type Bolted Armor Rods HSU Line Guards

Rod Length (in.) Other

Units RS1 RS2 RS3 RS4 RS5 RS6Ruling Span ft.Min. Span Length ft.Max. Span Length ft.Final Tension* lbs.*Final tension at average annual temperature or 60°F.

Shield Wire

Strand Size Suspension Type Bolted Armor Rods HSUNumber of Runs Single Double

Units RS1 RS2 RS3 RS4 RS5 RS6Ruling Span ft.Min. Span Length ft.Max. Span Length ft.Final Tension* lbs.*Final tension at average annual temperature.

Terrain Flat Rolling Mountains/Treed Line Direction

Note any river crossings

Comments

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