SIST EN 50341-2-9:2019/A1:2019

Overhead electrical lines exceeding AC 1 kV - Part 2-9: National Normative Aspects (NNA) for Great Britain and Northern Ireland (based on EN 50341-1:2012)

GB.1   General
This NNA is only applicable to all new overhead lines above A.C. 1kV.
This Euronorm is only applicable to new overhead lines and shall not be applied to maintenance, reconductoring, tee-offs, extensions or diversions to existing overhead lines unless specifically required by the Project Specification.
For details of the application of this standard for overhead lines constructed with covered conductor refer to the Project Specification.
For details of the application of this standard to telecommunication systems involving optical fibres either incorporated in or wrapped around earthwires or conductors or suspended from overhead line supports, reference should be made to the Project Specification.

Nadzemni električni vodi za izmenične napetosti nad 1 kV - 2-9. del: Nacionalna normativna določila (NNA) za Veliko Britanijo in Severno Irsko (na podlagi EN 50341-1:2012)

General Information

• Status: Published
• Publication Date: 11-Mar-2019
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: NVV - Overhead lines and overhead electrical conductors
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Aug-2018
• Due Date: 07-Oct-2018
• Completion Date: 12-Mar-2019
• Ref Project: EN 50341-2-9:2017/A1:2018 - Overhead electrical lines exceeding AC 1 kV - Part 2-9: National Normative Aspects (NNA) for Great Britain and Northern Ireland (based on EN 50341-1:2012)

Relations

• Amends: SIST EN 50341-2-9:2019 - Overhead electrical lines exceeding AC 1 kV - Part 2-9: National Normative Aspects (NNA) for Great Britain and Northern Ireland (based on EN 50341-1:2012)
• Effective Date: 06-Mar-2018

Overview

SIST EN 50341-2-9:2019/A1:2019 is a European standard developed by the CLC focusing on overhead electrical lines exceeding AC 1 kV, specifically addressing the National Normative Aspects (NNA) for Great Britain and Northern Ireland. This standard is a normative amendment based on EN 50341-1:2012 and presents specific modifications and requirements tailored to the GB and Northern Ireland regulations for the design and construction of new overhead power lines above 1 kV AC.

The document primarily applies to all new overhead lines exceeding AC 1 kV and explicitly excludes application to maintenance, reconductoring, extensions, or diversions of existing overhead lines unless otherwise stated in project specifications. It also outlines conditions for overhead lines constructed with covered conductors and telecommunication systems involving optical fibers installed on or along overhead line supports.

Key Topics

• Scope Specificity
  The standard is applicable exclusively to new overhead electrical lines above AC 1 kV in Great Britain and Northern Ireland, ensuring compliance with national safety and performance requirements.

• Design Resistance of Fasteners
  Amendment A1 introduces detailed calculations for design resistance of individual fasteners subjected to shear and/or tension.
  Key parameters include:

  • Shear resistance per shear plane based on bolt unthreaded area and material yield strength.
  • Bearing resistance values incorporating thickness, bolt diameter, distances between holes, and yield strengths for both bolted members and bolts themselves.
  • Methodology for calculating group fastener resistance, ensuring structural integrity and reliability in overhead line fittings.

• Coordination With Project Specifications
  The standard requires reference to project specifications for certain applications such as covered conductors or optical fiber integration to ensure project-specific compliance and safety.

• Applicability and Governance
  The British National Committee takes responsibility for the technical coordination and quality assurance of this amendment and enforces adherence to design approaches specified in the project-either Approach 1 or Approach 3.

Applications

SIST EN 50341-2-9:2019/A1:2019 serves as an essential guideline for engineers, designers, and contractors involved in the planning, design, and construction of new overhead electrical lines above 1 kV AC within Great Britain and Northern Ireland. Its practical applications include:

• Designing overhead power line supports and connections compliant with national safety and structural standards.
• Specifying mechanical fasteners and verifying their load-bearing capacities under shear and tension stresses.
• Integrating telecommunication optical fibers with overhead line infrastructure safely.
• Ensuring adherence to updated legislative and technical requirements affecting overhead line deployment projects in the UK.

This standard assists in mitigating risks related to structural failures, supports consistent quality during installation, and harmonizes national requirements with the broader European EN 50341 series.

Related Standards

• EN 50341-1:2012
  The base European standard covering general requirements for overhead electrical lines exceeding AC 1 kV, upon which this National Normative Aspects document is founded.

• EN 50341-2-x Series
  Other parts of the EN 50341 Part 2 series addressing different countries' normative aspects for overhead lines, facilitating harmonization across Europe.

• British Standards and Regulations
  The standard aligns with applicable UK national standards and regulations concerning overhead line design, installation, and safety, gradually being updated to reflect the harmonized European standards.

Summary

SIST EN 50341-2-9:2019/A1:2019 provides comprehensive, nationally-specific modifications and amendments to the overarching EN 50341 series, ensuring that new overhead electrical lines in Great Britain and Northern Ireland adhere to precise safety, mechanical, and design requirements. It is indispensable for power transmission infrastructure projects exceeding 1 kV AC, promoting technical reliability, regulatory compliance, and integration of modern line components such as covered conductors and optical fiber systems. Adherence to this standard supports the development of robust, safe, and efficient overhead electrical networks within the UK.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2019
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Overhead electrical lines exceeding AC 1 kV - Part 2-9: National Normative Aspects
(NNA) for Great Britain and Northern Ireland (based on EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-9:2017/A1:2018
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50341-2-9:2017/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2018
ICS 29.240.20
English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-9: National
Normative Aspects (NNA) for Great Britain and Northern Ireland
(based on EN 50341-1:2012)
This amendment A1 modifies the European Standard EN 50341-2-9:2017; it was approved by CENELEC on 2018-05-15. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50341-2-9:2017/A1:2018 E

Contents Page
European foreword . 3
1 Modification to J.5.1 General . 4

3 Great Britain and Northern Ireland EN 50341-2-9:2017/A1:2018

European foreword
1. The British National Committee is identified by the following address:
British Standards Institution
389 Chiswick High Road
London W4 4AL
Tel: [phone]
Fax: [phone]
Email: [e-mail]
2. The British National Committee (NC) has prepared this Part 2-9/A1 (EN 50341-2-9:2017/A1)
listing the GB National Normative Aspects Amendment 1 (NNA/A1) under its sole responsibility
and duly passed this document through the CENELEC and CLC/TC 11 procedures.
NOTE: The British NC also takes sole responsibility for the technically correct co-ordination of this EN
50341-2-9:2017/A1 with Part 2-9 (EN 50341-2-9:2017). It has performed the necessary checks in the frame
of quality assurance / control. However, it is noted that this quality control has been made in the framework
of the general responsibility of a standards committee under the national laws / regulations.
3. This NNA/A1 is normative in GB and informative for other countries.
4. This NNA/A1 shall be read in conjunction with Part 2-9 and Part 1. The highlighted text (in yellow)
shows the changes. All clause numbers used in this NNA/A1 correspond to those in Part 2-9 and
Part 1. Specific sub-clauses that are prefixed ‘GB’ are to be read as amendments to the relevant
text in Part 1 and Part 2-9. Any necessary clarification regarding the application of this NNA/A1 in
conjunction with Part 2-9 and Part 1 shall be referred to the British NC who will, in co-operation
with CL
...