plp_energycatsec4-12.pdf

8/14/2019 plp_energycatsec4-12.pdf

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Transmission: Sec

Section 4 Transmission: Spacer & Spacer DampersTable of Contents

Helical Rod Spacer ..................................................................................4-2

CUSHION-GRIP Twin Spacer ................................................................4-4

CUSHION-GRIP Spacer Damper ..........................................................4-5

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Helical Rod Spacer

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NOMENCLATURE

GENERAL RECOMMENDATIONS

Intended Use: The HELICAL ROD Spacer is recommendedfor use on horizontal , twin conductor bundles.

The functions of the HELICAL ROD Spacer are: to provideuniform spacing of horizontally bundled subconductors,to insure consistent electrical characteristics; to minimizewind induced motions such as subconductor oscillation andaeolian vibration so that no conductor damage results; tokeep the subconductors from entangling due to galloping,ice unloading, and fault currents.

Materials: The standard HELICAL ROD Spacer for aluminumbased conductors is constructed entirely of high strengthaluminum alloy wire formed into helical rods. There are noloose parts or troublesome articulated joints to create radionoise through looseness. To avoid galvanic corrosion spacerrod material is always designed to be compatible with theconductor. Materials other than aluminum are available forspecial application to copper based conductor and galva-nized steel wire.

RIV-Corona: Helical Spacers are designed to be corona-free at voltages 10-20% above operating up to 500 kV ACand 750 kV DC.

Installation and Inspection: The spacer is applied easilyand uniformly without tools and can be installed with hot linetools. It is a simple matter to inspect for proper applicationfrom the ground since there are no bolts that need specialtorquing during installation.

Fault Currents: The HELICAL ROD Spacer is designed tomeet fault current requirements developed in most EHV linedesign. For special situations the fault current capacity of thestandard 4-rod helical spacer can be increased by addingadditional rods and/or increasing rod diameter. Completefault current testing and analysis has been completed forthe HELICAL ROD Spacer and is published in AIEE paperDP 58-779, and IEEE paper 63-88.

Spacer Placement: As a result of experimental work doneon some of the early EHV lines, the normal distance betweenHELICAL ROD Spacers should not exceed 250-ft. However,in some geographical areas exposed to constant high windsand heavy ice accumulation, experience suggests that thespacing should be shortened in order to stabilize the con-ductor bundle. Results of laboratory and eld experimentsindicate that one of the most effective methods to reducesubconductor oscillation and increase bundle stability is byreducing subspan lengths and placing spacers in a non-symmetrical pattern. Asymmetric spacing detunes the entirespacer-conductor system and thereby reduces the incidenceof sympathetic vibration between subspans.

Specic recommendations for spacer design and spacerplacement should be predicated on an evaluation of theelectrical characteristics, the line design parameters, andthe environmental conditions. Through your representative,PLP will help determine the most suitable spacer designand placement pattern for your line conditions.

Thermal Rating (Continuous) 125C

Approx. Applied Length

Alluminum Alloy Rods

18" Subconductor Spacing(Consult PLP for other spacing)

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Helical Rod Spacer Twin-18"

For use on:ACSR, Aluminum Alloy

All-Aluminum, AWAC Compacted All-AluminumCompacted ACSR

Right-hand lay standard

EXPLANATORY NOTES:

(1) Typical Conductor Size indicates one of various conductors within each range.(2) Design for conductors below .800" diameter available upon request.(3) Designs for other spacing and conductor materials available upon request.(4) AWAC and Copperweld are registered trademarks of the Copperweld Co.

Catalog Number

Diameter Range (Inches)Typical

Conductor Size

ApproximateApplied Length

(Inches) Color CodeMin. Max.

SU-MS-7424 .800 .835 397.5, 30/7 35 Purple

SU-MS-3352 .836 .868 477, 26/7 35 Blue

SU-MS-7425 .869 .910 477, 30/7 35 Green

SU-MS-3540 .911 .950 556.5, 26/7 44 BlackSU-MS-5423 .951 .994 715.5, 37-61W, All Alum. 44 Brown

SU-MS-7426 .995 1.038 666.6, 24/7 45 Orange

SU-MS-5504 1.039 1.088 795, 45/7 45 Blue

SU-MS-1245 1.089 1.140 795, 26/7 45 Yellow

SU-MS-3850 1.141 1.196 954, 54/7 46 Orange

SU-MS-6070 1.197 1.250 1113, 61W, All Alum. 46 Purple

SU-MS-5276 1.251 1.305 1272, 61W, All Alum. 46 Green

SU-MS-5519 1.306 1.365 1272, 45/7 48 Yellow

SU-MS-7228 1.366 1.425 1272, 54/19 48 Black

SU-MS-5285 1.426 1.492 1431, 54/19 49 Brown

SU-MS-4397 1.493 1.562 1590, 54/19 49 Red

SU-MS-5056 1.563 1.619 1780, 84/19 50 Green

SU-MS-4767 1.620 1.678 2000, 72/7 50 Yellow

SU-MS-5462 1.679 1.731 2250, 91W, All Alum. 50 Brown

SU-MS-4656 1.732 1.795 2156, 84/19 50 Orange

SU-MS-3807 1.796 1.855 2500, 91W, All Alum. 50 Red

SU-MS-6183 1.856 1.923 2750, 91W, All Alum. 50 Blue

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GENERAL INFORMATION

The CUSHION-GRIP Twin Spacer is simple to install andis shipped fully assembled (no loose parts).

The break-away bolt provides a clear indication that theproper installation torque has been achieved (no specialtools required).

Conductor Spacing is 18 inches (457 mm), but also availablein 13 inch (330 mm) spacing.

CatalogNumber

DiameterRange

Min. Max.

CGTS-0101 0.673 0.713

CGTS-0102 0.714 0.752CGTS-0103 0.753 0.791

CGTS-0104 0.792 0.831

CGTS-0105 0.832 0.870

CGTS-0106 0.871 0.909

CGTS-0107 0.910 0.949

CGTS-0108 0.950 0.988

CGTS-0109 0.989 1.028

CGTS-0110 1.029 1.067

CGTS-0111 1.068 1.106

CGTS-0112 1.107 1.146

CGTS-0113 1.147 1.185

CGTS-0114 1.186 1.224

CGTS-0115 1.225 1.264

CGTS-0116 1.265 1.303

CGTS-0117 1.304 1.345

CGTS-0118 1.346 1.382

CGTS-0119 1.383 1.421

CGTS-0120 1.422 1.461

CGTS-0121 1.462 1.500

CGTS-0122 1.501 1.539

CGTS-0123 1.540 1.579

CGTS-0124 1.580 1.618

CGTS-0125 1.619 1.657

CGTS-0126 1.658 1.697

CGTS-0127 1.698 1.736

CGTS-0128 1.737 1.776

CGTS-0129 1.777 1.821

Thermal RatingStandard 125C

HT Version 200C

CUSHION-GRIP Twin Spacer

Two versions of the CUSHION-GRIP Twin Spacer are avail-able. The standard version is designed for up to 125C; 150for 2 hour emergency conductor operation and the hightemperature (HT) version can be used for applications withconductor operating temperatures up to 200C; 225 for 2hour emergency.

Notes: For high temperature (HT) version add HT to the catalognumber (Example: CGTS - 0112HT).

For 13 inch spacing add -13 to catalog number (Example:CGTS - 0112HT - 13).

CUSHION-GRIP Twin Spacer for T2 or VR conductors

Catalog Number Conductor Size

CGTS-T2266 Partridge

CGTS-T2336 Linnet

CGTS-T2397 Ibis

CGTS-T2477 Hawk

For 13 inch spacing add -13 to catalog number (Example:CGTS - T2266 - 13).

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CUSHION-GRIP Spacer Damper (Type B & Type C)

GENERAL INFORMATION

NOMENCLATURE

The CUSHION-GRIP Spacer Dampers for Twin, Tri,Quad and Hex Bundles feature elastomer dampingelements engineered to absorb maximum energy.This design provides the greatest possible resis-tance to conductor fatigue by eliminating the need foradditional vibration dampers.

UNIQUE DESIGNSThe Type B design was developed in cooperation with theEngineering Team at PLP-Brazil to meet the demandingrequirements of IEC Specication 61854, while maintaininga light overall weight and exceptional performance.

The Type C design was developed in conjuction with PLP-Great Britain to exceed the extremely difficult performancerequirements established by the National Grid Companyin the early 1990s. As such, this design is heavier and

more robust and is well suited for areas where traditionalspacer dampers have experienced premature performanceproblems or failures.

PATENTED DAMPING ELEMENTSBoth the Type B and Type C designs employ uniquedamping elements which are captured in a way which as-sures the elastomer is always in compression, providingmaximum service life.

FIELD PROVENBoth spacer damper designs have been used extensivelythroughout Europe and Brazil since their introduction inthe early 1990s.

CLAMP FASTENER ASSURES PROPERINSTALLATIONA high strength 1/4 turn fastener is employed in theelastomer lined conductor clamp to insure properinstallation. This design provides consistent compression ofthe elastomer liners without relying on specic bolt torquevalues or bolts with break-away heads.

PLACEMENT IS THE KEY TO PERFORMANCEPLPs extensive experience and laboratory and eld testingallow us to provide you with placement recommendationsthat will minimize the motion of conductor bundles and

maximize the longevity of the Spacer Damper.

CGSD3-0122

TogglePin

Keeper

Frame

Elastomer Inserts

Arm

Thermal RatingStandard: 125C

HT Version: 200C

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ORDERING INFORMATION

For standard 18" (457mm) sub-conductor spacing thecatalog numbers are:

CGSDT-X45YZWhere T is B for Type B or C for Type CYZ is taken from the conductor range table belowX is 2 for Twin, 3 for Tri, 4 for Quad, 6 for Hex

Example:CGSDB-34529 is a Type B Spacer Damper for a Tri Bundleof conductors within a diameter range of 1.107" to 1.146"(28-29 mm).

Note: For high temperature (HT) version add HT to thecatalog number (Example CGSDB-34529HT).

YZ Conductor Range Inches (mm)

18 0.673-0.713 (17-18)

19 0.714-0.752 (18-19)

20 0.753-0.791 (19-20)

21 0.792-0.831 (20-21)

22 0.832-0.870 (21-22)

23 0.871-0.909 (22-23)

24 0.910-0.949 (23-24)

25 0.950-0.988 (24-25)

26 0.989-1.028 (25-26)

27 1.029-1.067 (26-27)

28 1.068-1.106 (27-28)

29 1.107-1.146 (28-29)

30 1.147-1.185 (29-30)

31 1.186-1.224 (30-31)

YZ Conductor Range Inches (mm)

32 1.225-1.264 (31-32)

33 1.265-1.303 (32-33)

34 1.304-1.345 (33-34)

35 1.346-1.382 (34-35)

36 1.383-1.421 (35-36)

37 1.422-1.461 (36-37)

38 1.462-1.500 (37-38)

39 1.501-1.539 (38-39)

40 1.540-1.579 (39-40)

41 1.580-1.618 (40-41)

42 1.619-1.657 (41-42)

43 1.658-1.697 (42-43)

44 1.698-1.736 (43-44)

45 1.737-1.776 (44-45)

46 1.777-1.821 (45-46)Contact PLP for other sub-conductor spacingsand congurations.

CatalogNumber Description

00071004 CUSHION-GRIP Spacer Damperinstallation tool

CUSHION-GRIP Spacer Damper (Type B & Type C)

Type "B"

Type "C"

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plp_energycatsec4-12.pdf