IEC TR 61328:2024
(Main)Live working - Guidelines for the installation of transmission and distribution line conductors and earth wires - Stringing equipment and accessory items
Live working - Guidelines for the installation of transmission and distribution line conductors and earth wires - Stringing equipment and accessory items
IEC TR 61328:2024 provides information for the selection of conductor stringing, earthing and bonding equipment used for the installation of bare and insulated overhead distribution conductors, as well as overhead transmission conductors and overhead earth wires.
Procedures are given for installation and maintenance of distribution and transmission conductors. A discussion of electric hazards is provided as well as relevant earthing and bonding techniques.
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IEC TR 61328 ®
Edition 4.0 2024-11
TECHNICAL
REPORT
Live working – Guidelines for the installation of transmission and distribution
line conductors and earth wires – Stringing equipment and accessory items
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IEC TR 61328 ®
Edition 4.0 2024-11
TECHNICAL
REPORT
Live working – Guidelines for the installation of transmission and distribution
line conductors and earth wires – Stringing equipment and accessory items
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.260; 29.240.20; 29.260.99 ISBN 978-2-8322-9554-0
– 2 – IEC TR 61328:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and acronyms . 7
3.1 Terms and definitions . 7
3.2 Acronyms . 15
4 Understanding the hazards – Basic theory . 15
4.1 General . 15
4.2 Electric field induction from nearby circuits . 16
4.2.1 Overview . 16
4.2.2 Induced voltage . 16
4.2.3 Induced current . 17
4.2.4 Electrostatic charging . 18
4.3 Magnetic field induction from nearby circuits . 18
4.3.1 Induced current . 18
4.3.2 Induced voltage . 20
4.4 Re-energization . 20
4.5 Mechanical risk . 21
5 Conductor stringing methods and equipment . 21
5.1 General . 21
5.2 Slack stringing method . 22
5.3 Tension stringing method . 24
5.4 Stringing equipment . 32
5.4.1 General . 32
5.4.2 Tensioners . 32
5.4.3 Pullers . 34
5.4.4 Reel winders . 38
5.4.5 Reel stands . 39
5.4.6 Pilot rope puller . 41
5.4.7 Pilot rope and pulling rope . 41
5.4.8 Woven wire grip . 42
5.4.9 Stringing blocks . 42
5.4.10 Stringing rollers . 45
5.4.11 Stringing block earth . 46
5.4.12 Running earth . 47
5.4.13 Hold-down block . 47
6 Special earthing applications . 48
6.1 General . 48
6.2 Earthing systems . 49
6.2.1 Overview . 49
6.2.2 Use of earth rods . 49
6.2.3 Equipment earths . 50
6.2.4 Earths for conductor, earth wire, metallic and synthetic rope . 50
6.2.5 Earths for earth mat, conductors or earth wires. 50
6.2.6 Earths for mid-span joining of conductors or earth wires . 51
6.2.7 Earths for clipping in the conductors or earth wires . 51
6.2.8 Earths for installation of jumper loops for the conductor . 51
6.2.9 Stringing block earths . 51
6.2.10 Earth mat . 51
6.3 Procedures and application of earthing systems . 56
6.3.1 Overview . 56
6.3.2 Installation of the pilot or pulling rope . 56
6.3.3 Stringing of conductors . 57
6.3.4 Splicing of conductors . 57
6.3.5 Sagging of conductors . 57
6.3.6 Clipping-in conductors . 57
6.3.7 Dead-ending and installation of jumper loops . 58
6.3.8 Spacing . 58
6.3.9 Special work on conductors . 58
6.3.10 Fuelling . 58
Bibliography . 59
Figure 1 – Electric field induction from nearby circuits – Induced voltage . 17
Figure 2 – Electric field induction from nearby circuits – Induced current . 18
Figure 3 – Magnetic field induction from nearby circuits – Induced current . 19
Figure 4 – Magnetic field induction from nearby circuits – Induced voltage . 20
Figure 5 – Slack stringing method . 24
Figure 6 – Tension stringing method . 31
Figure 7 – Bullwheel tensioners . 34
Figure 8 – Bullwheel pullers . 37
Figure 9 – Reel winder . 39
Figure 10 – Reel stand and carrier . 40
Figure 11 – Stringing blocks. 45
Figure 12 – Stringing rollers . 46
Figure 13 – Hold-down block diagram of use . 48
Figure 14 – Earthing systems . 56
– 4 – IEC TR 61328:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIVE WORKING – GUIDELINES FOR THE INSTALLATION
OF TRANSMISSION AND DISTRIBUTION LINE CONDUCTORS AND
EARTH WIRES – STRINGING EQUIPMENT AND ACCESSORY ITEMS
FOREWORD
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