SVENSKA KRAFTNÄT · TR05-04E Svenska kraftnät Technical guidelines - Conductors 2 Scope These...

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KRAFTNÄTSWEDISH NATIONAL GR1D

---- ■ SVENSKA

UNIT, BUSINESS AREANTL, Overhead Transmission Lines, Grid Technolog)'

DATE9 March 2020

CONSULTATIONSNAL, NLB, NLPV) iff Ml

OUR REFERENCETR05-08E

TECHNICAL GUIDELINE

REVISION

4APPROVED

Overhead transmission linesSpacers

IntroductionThese guidelines describe the requirements on spacers for aluminium conductors Steel reinforced and aluminium alloy conductors in accordance with TR05- 04E for overhead transmission lines and cover design and test. The guide-lines intend to guarantee satisfactoiy performance of spacers during the lifetime of the overhead line and shall be used at purchasing of spacers.

TECHNICAL GUIDELINE 9 March 2020 TR05-08E rev 4

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Revision Notes Change notes Date

1(A) Template changed 09 / 07 / 2008

2 Template changed. Revised chapter 8.4Description. Clause 8.5.3.4 locking of bolts and nuts, punches added. Clause 8.8.2.6 revised. Clause 8.8.3 added. Clause 8.10 terrain factor 0,8 deleted.

02 / 04 / 2012

3 New template clause numbers changed. Clause 7.1 sample size changed.

09 / 06 / 2016

4 New template. Table 3 inserted. 09 / 03 / 2020

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Content

1 References ........................................................................................................... 5

2 Scope .................................................................................................................... 5

3 Definitions ........................................................................................................... 5

4 Requirements for spacer .................................................................................... 6

4.1 General 6

4.1.1 Marking-identification 6

4.1.2 Description 6

4.1.3 Material 6

4.1.4 Design 7

4.1.5 Mechanical requirement 8

4.1.6 Electrical requirement 8

5 Test program ....................................................................................................... 8

5.1 Type test 8

5.2 Sample test 8

6 Delivery ............................................................................................................... 9

6.1 Documentation 9

6.1.1 General 9

6.1.2 Assembly drawing 10

6.1.3 List of material 10

6.1.4 Reports 10

6.1.5 Installation instructions 10

6.2 Transport and storing 10

7 Installation ........................................................................................................ 10

7.1 General 10

7.2 Installation 11

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7.2.1 Twin bundle conductors 11

7.2.2 Triple bundle conductor 11

8 Tables................................................................................................................. 12

Table 1 Placing, twin bundle conductors (terrain factor 1,0) 12

Table 2 Placing, triple bundle conductors (terrain factor 1,0) 13

Table 3 Test program 14

9 Figures ............................................................................................................... 16

Figure 1 Placing, twin bundle conductors 16

Figure 2 Placing, triple bundle conductors 16

5 (16)


1 References

EN ISO 9001 Quality management systems – Requirements

IEC 61284 Overhead lines – Requirements and tests for fittings

IEC 61854 Overhead lines - Requirements and tests for spacers

ISO 898-1 Mechanical properties of fasteners made of carbon

steel and alloy steel - Part 1: Bolts, screws and studs

with specified property classes - Coarse thread and

fine pitch thread

ISO 898-2 Mechanical properties of fasteners made of carbon

steel and alloy steel - Part 2: Nuts with specified

property classes - Coarse thread and fine pitch thread

ISO 1461 Hot dip galvanized coatings on fabricated iron and

steel articles - Specifications and test methods

ISO 3506-1 Mechanical properties of corrosion-resistant stain-

less steel fasteners - Part 1: Bolts, screws and studs

ISO 3506-2 Mechanical properties of corrosion-resistant stain-

less steel fasteners -- Part 2: Nuts

ISO 10684 Fasteners Hot dip galvanized coatings

TR05-04E Svenska kraftnät Technical guidelines - Conductors

2 Scope

These guidelines are applicable to spacers that are to be used on aluminium

conductors steel reinforced and aluminium alloy conductors in accordance with

TR05-04E for overhead lines and comprise design, testing and installation.

The intention of the specification is to guarantee satisfactory performance of the

spacers during the lifetime of the overhead line.

3 Definitions

Technical terms and definitions used in these guidelines:

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Clamp

That part of the spacer which attaches and secures the spacer to the respective

conductor.

Highest voltage for equipment

The highest phase-to-phase voltage for which the equipment is designed. Highest

voltage for equipment is designated Um in this document.

Corona extinction voltage

The voltage where no corona is visible when the voltage is reduced from a level with

visible corona.

4 Requirements for spacer

4.1 General Spacers shall be able to withstand the mechanical stresses which can occur during

transport, handling and installation at temperatures as low as –40 °C, in addition

to the mechanical stresses which can occur during the lifetime of the overhead line

at temperatures from -50 °C to +100 °C.

The manufacturer shall have a quality system in accordance with at least EN ISO

9001.

4.1.1 Marking-identification

The spacer shall be marked with raised or indented / stamped characters with a

minimum height of 3 mm as follows:

• Trademark of the manufacturer

• Type or catalogue number

• Conductor diameter

• Bolts and nuts to be marked in accordance with ISO 898 and ISO 3506

• Year of manufacture

4.1.2 Description

The spacer is to be used with multi-conductor bundles within the same phase for

both twin and triple arrangements. Spacers for triple arrangements shall be ar-

ranged in a group consisting of three loose spacers.

Spacers comprise a clamp for each conductor and a connecting bar.

4.1.3 Material

All parts of the spacer shall be manufactured of metal.

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Steel parts shall be hot-dip galvanized with zinc thickness in accordance with ISO

1461 table 3.

The clamps shall be manufactured of aluminium alloy containing a maximum of

0,10% Cu. The alloy shall be resistant to inter-crystalline, layer and stress

corrosion.

Bolt and nuts shall be in accordance with ISO 898-1 and ISO 898-2 with

mechanical property 8.8. Bolt, nut and washer shall be hot-dip galvanized in

accordance with ISO 10684. Stainless steel shall be in accordance with the

requirements of quality A2-80, ISO 3506-1 and ISO 3506-2.

4.1.4 Design

Spacers shall be so designed that it is possible, with hot line tools, to install and

remove them from live conductors without completely dismantling the parts of the

spacer.

Spacers shall be designed to avoid accumulation of water. Holes for drainage, if

any, shall have a minimum diameter of 6 mm.

Spacers shall be designed for use on twin and triple bundle conductors. The

distance between sub-conductors shall be 450 mm up to and including a conductor

diameter of 32 mm and 600 mm for conductor diameter greater than 32 mm.

The clamp attachment to the bar shall be articulated and allow an angular dis-

placement of ± 12° in the direction of the conductor groove and ± 2° in a direction

perpendicular to the direction of the conductor groove.

The conductor groove of the clamp shall fit the conductor diameter in accordance

with TR05-04E and be free from irregularities and sharp edges. The conductor

groove shall not contain non-metallic materials.

The clamp to the conductor shall be equipped with a washer under the bolt head

and/or under the nut. The washer shall be designed so as to avoid damage to the

clamp under the washer. Spring washer is not allowed.

For conductors with a diameter equal to or over 30 mm shall bolts and nuts have

M16 metrics threads.

For conductors with a diameter of less than 30 mm is bolts and nuts with M12

metric threads acceptable.

Bolts shall be long enough to protrude outside the thread of the nut.

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Bolts and nuts shall be designed so that they can be mechanically locked after

installation with two punches if not the manufacturer specify other mechanical

metallic locking.

Welding is not permitted.

4.1.5 Mechanical requirement

The spacer shall, without showing signs of permanent deformation, withstand an

axial tensile force of 8 kN.

The spacer shall, without rupture, withstand an axial tensile force of 14 kN.

The spacer shall, without showing signs of permanent deformation, withstand an

axial compressive force of 7 kN.

The spacer shall, without rupture, withstand an axial compressive force of 10 kN.

4.1.6 Electrical requirement

Corona

Spacers shall show no visible corona at the test voltage calculated as follows:

𝑇𝑒𝑠𝑡 𝑣𝑜𝑙𝑡𝑎𝑔𝑒 = 𝑈𝑚 ∗1,1

√3

Where Um is 245 kV or 420 kV respectively.

Radio interference

The spacer shall be conductive to avoid radio interference.

5 Test program

5.1 Type test Type test shall be performed in accordance with TR05-08E table 3 on three test

samples.

5.2 Sample test Sample test shall be carried out by the manufacturer on spacers selected at random

from the lot to be supplied. The test shall be performed in accordance with TR05-

08E table 3.

Test samples shall be supplied by the manufacturer free of charge to the client and

shall not be included in the lot to be supplied. The sizes of the test sample are

indicated in the table below.

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Spacers which have been submitted for test shall be discarded.

The manufacturer shall inform the client when sample tests shall be performed.

Records from the sample tests shall be filed by the manufacturer and be shown to

the client on request. In the case where any component does not comply with the

requirements, re-testing shall be performed as below.

If only one spacer, or part thereof, fails to comply with the sample test requirement,

a new sample equal to twice the quantity originally submitted for that test shall be

subject to re-testing. The re-testing shall comprise the test or tests in which failure

occurred.

If two or more spacers, or parts thereof, fail to comply with any of the sample tests,

or if any failure occurs during re-testing, the complete lot shall be considered not to

comply with the requirements.

Provided that the cause of the failure can be clearly identified, the manufacturer

may sort the lot to eliminate all the spacers with this defect. The sorted lot shall

then be resubmitted for sample testing. The number then selected shall be three

times the first quantity chosen for the test. The re-testing shall comprise the test or

tests in which failure occurred in the original test. If any spacer, or part thereof of

the sorted lot, fails during this re-testing, the complete lot shall be considered as

not complying with the requirements.

6 Delivery

6.1 Documentation

6.1.1 General

All documentation shall be written in English.

Lot size Sample size

N ≤ 300 1-3 subject to agreement

300 < N ≤ 2000 4

2000 < N ≤ 5000 8

5000 < N ≤ 10000 12

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Complete documentation in accordance with Clauses 6.1.2 –6.1.5 shall be available

to the client before delivery.

6.1.2 Assembly drawing

The assembly drawing shall have a minimum of two views at an appropriate scale.

On the drawing shall be given:

Type and/or Catalogue number

Principal dimensions

The dimensions of the conductor groove with tolerances

Maximum and minimum conductor diameter for the spacer

clamp

Installation torque

All marking

Weight

6.1.3 List of material

Description of material in included parts. Preferably described on the assembly

drawing.

6.1.4 Reports

Complete reports with all measured values reported, from all controls according to

clause 5.

6.1.5 Installation instructions

Installation instructions in English with the required drawings. Preferably

described on the assembly drawing.

6.2 Transport and storing The spacers shall be packed up in that way that they will not be damaged or fouled

at transport, construction and storing.

7 Installation

7.1 General Installation on the conductors shall be performed in accordance with the instal-

lation instructions. The spacers are to be installed perpendicular to the conductors.

After assembly shall the bolts nuts be locked with two punches or other

mechanically metallic locking system that is accepted by the client.

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7.2 Installation Maximum deviation of the spacer clamps in the line direction is 5 cm.

Note, span length for each phase can differ between supports with angles. In such

case the placing of the spacer shall be based on the middle phase. The spacers in

the outer phases shall be placed in level with the middle phase spacers.

7.2.1 Twin bundle conductors

Within any span the spacers are to be placed in accordance with TR05-08E figure 1

with distances from the supports as given in TR05-08E table 1. The distances are

valid for normal sagging tensions after clamping in.

7.2.2 Triple bundle conductor

Within any span the spacers are to be placed in groups of three in accordance with

TR05-08E figure 2. The distances from each support to the first spacer in each

group are given in TR05-08E table 2. The distances are valid for normal sagging

tensions after clamping in.

The first spacer of each group shall connect the upper left conductor with the lower

conductor. The second spacer shall connect the upper two conductors and the

third spacer shall connect the upper right conductor with the lower conductor. The

relative distances between spacers in a group shall be 5 metres. The distances are

valid for normal sagging tensions after clamping in.

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8 Tables

Table 1 Placing, twin bundle conductors (terrain factor 1,0)

Span length No’s Distance form support to the respectively spacer over m

up to m

of groups

L1 m

L2 m

L3 m

L4 m

L5 m

L6 m

L7 m

60 130 1 0,44 S - - - - - -

130 140 2 34 87 - - - - -

140 150 2 37 94 - - - - - 150 160 2 40 100 - - - - - 160 170 2 42 107 - - - - - 170 180 2 45 113 - - - - - 180 190 2 47 120 - - - - - 190 200 2 50 126 - - - - - 200 210 2 52 133 - - - - - 210 220 2 55 139 - - - - - 220 230 3 43 110 169 - - - - 230 240 3 45 115 177 - - - - 240 250 3 47 119 185 - - - - 250 260 3 49 124 192 - - - - 260 270 3 51 129 200 - - - - 270 280 3 53 134 207 - - - - 280 290 3 55 139 215 - - - - 290 300 4 43 109 169 235 - - - 300 310 4 45 113 175 243 - - - 310 320 4 46 117 181 251 - - - 320 330 4 47 121 186 259 - - - 330 340 4 49 124 192 267 - - - 340 350 4 50 128 198 275 - - - 350 360 4 52 132 203 283 - - - 360 370 4 53 135 209 291 - - - 370 380 4 55 139 215 299 - - - 380 390 5 47 120 186 259 324 - - 390 400 5 49 123 191 265 333 - - 400 410 5 50 126 195 272 341 - - 410 420 5 51 130 200 279 349 - - 420 430 5 52 133 205 285 358 - - 430 440 5 54 136 210 292 366 - - 440 450 5 55 139 215 299 375 - - 450 460 6 47 118 183 254 319 391 - 460 470 6 48 121 187 260 326 399 - 470 480 6 49 123 191 266 333 408 - 480 490 6 50 126 195 271 340 416 - 490 500 6 51 129 199 277 347 425 - 500 510 6 52 131 203 282 354 433 - 510 520 6 53 134 207 288 361 442 - 520 530 6 54 136 211 294 368 451 - 530 540 6 55 139 215 299 375 459 - 540 550 7 49 125 193 269 338 413 482 550 560 7 50 127 197 274 344 421 491 560 570 7 51 130 201 279 350 429 499 570 580 7 52 132 204 284 356 436 508 580 590 7 53 134 208 289 362 444 517 590 600 7 54 137 211 294 369 451 526 600 - - To be determined at each case

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Table 2 Placing, triple bundle conductors (terrain factor 1,0)

Span length No’s Distance form support to the respectively spacer over

m up to

m of

groups L1

m

L2

m

L3

m

L4

m

L5

m

L6

m

L7

m

60 140 1 0,40 S - - - - - -

140 150 2 34 87 - - - - - 150 160 2 37 94 - - - - - 160 170 2 40 100 - - - - -

170 180 2 42 107 - - - - - 180 190 2 45 113 - - - - - 190 200 2 47 120 - - - - -

200 210 2 50 126 - - - - - 210 220 2 52 133 - - - - - 220 230 2 55 139 - - - - -

230 240 3 43 110 169 - - - - 240 250 3 45 115 177 - - - - 250 260 3 47 119 185 - - - - 260 270 3 49 124 192 - - - -

270 280 3 51 129 200 - - - - 280 290 3 53 134 207 - - - - 290 300 3 55 139 215 - - - -

300 310 4 43 109 169 235 - - - 310 320 4 45 113 175 243 - - - 320 330 4 46 117 181 251 - - -

330 340 4 47 121 186 259 - - - 340 350 4 49 124 192 267 - - - 350 360 4 50 128 198 275 - - -

360 370 4 52 132 203 283 - - - 370 380 4 53 135 209 291 - - - 380 390 4 55 139 215 299 - - -

390 400 5 47 120 186 259 324 - - 400 410 5 49 123 191 265 333 - - 410 420 5 50 126 195 272 341 - - 420 430 5 51 130 200 279 349 - -

430 440 5 52 133 205 285 358 - - 440 450 5 54 136 210 292 366 - - 450 460 5 55 139 215 299 375 - -

460 470 6 47 118 183 254 319 391 - 470 480 6 48 121 187 260 326 399 - 480 490 6 49 123 191 266 333 408 -

490 500 6 50 126 195 271 340 416 - 500 510 6 51 129 199 277 347 425 - 510 520 6 52 131 203 282 354 433 -

520 530 6 53 134 207 288 361 442 - 530 540 6 54 136 211 294 368 451 - 540 550 6 55 139 215 299 375 459 -

550 560 7 49 125 193 269 338 413 482 560 570 7 50 127 197 274 344 421 491 570 580 7 51 130 201 279 350 429 499 580 590 7 52 132 204 284 356 436 508 590 600 7 53 134 208 289 362 444 517

600 - - To be determined at each case

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Table 3 Test program

Item

Type te

st

Sam

ple

test Standard/Requirement Acceptance criteria

Visual examination X X IEC 61854 clause 7.1 IEC 61854 clause 7.1

Verification of

dimensions,

materials and

mass

X X IEC 61854 clause 7.2 IEC 61854 clause 7.2

Corrosion

protection test for

hot dip galvanized

steel material

X X TR05-08E clause 4.1.3. ISO 1461 table 3 for steel

material. For bolts, nuts and

washers ISO 10684

Clamp slip test X 1) IEC 61854 clause 7.5.1 and

7.5.1.1..

No slippage shall occur at

minimum applied load of 4kN

Clamp bolt

tightening test

X 1) IEC 61854 clause 7.5.3. 5 with

the exception that the last step is

changed to 120% of

recommended installation

torque.

IEC 61854 clause 7.5.3.

Tensile and

compressive load

test

X Both spacer clamps shall be

installed on a steel or aluminium

rod with the same diameter as the

conductor for which the clamp is

designed. The tightening torque

shall be the rated installation

torque.

A compression load respectively

tensile load in line with the spacer

bar shall be applied to the spacer

through the conductor rods.

Compression: neither

deformation at axial load of 7 kN,

nor rupture at 10 kN. Tension

load: neither deformation at axial

load of 8 kN, nor rupture at 14

kN. (TR05-08E clause 4.1.5)

Flexibility X 1) Both spacer clamps shall be

installed on a steel or aluminium

rod with the same diameter as the

conductor for which the clamp is

designed. One clamp to be fixed

to the underlying surface and the

The clamp attachment to the bar

shall allow an angular

displacement of ± 12° in the

direction of the conductor groove

and ± 2° in a direction

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other moved along the conductor

rod respectively perpendicular to

the direction of the conductor

groove.

perpendicular to the direction of

the conductor groove.

Corona X IEC 61284 clause 14 50Hz alternating test voltage.

Extinction voltage minimum.

𝑇𝑒𝑠𝑡 𝑣𝑜𝑙𝑡𝑎𝑔𝑒 = 𝑈𝑚 ∗1,1

√3

Um is 245 kV or 420 kV (AC).

1) At every 300 pieces at total order quantities.

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9 Figures

Figure 1 Placing, twin bundle conductors

Figure 2 Placing, triple bundle conductors

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