EN 50341-2-16:2016

SLOVENSKI STANDARD
01-februar-2018
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Overhead electrical lines exceeding AC 1 kV - Part 2-16: National Normative Aspects
(NNA) for NORWAY (based on EN 50341-1:2012)
Lignes électriques aériennes dépassant 1 kV en courant alternatif - Partie 2-16 : Aspects
Normatifs Nationaux pour la NORVEGE (Basé sur l'EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-16:2016
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 50341-2-16

NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2016
ICS 29.240.20
English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-16:
National Normative Aspects (NNA) for NORWAY (based on EN
50341-1:2012)
Lignes électriques aériennes dépassant 1 kV en courant
alternatif - Partie 2-16 : Aspects Normatifs Nationaux pour
la NORVEGE (Basé sur l'EN 50341-1:2012)
This European Standard was approved by CENELEC on 2016-09-13. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50341-2-16:2016 E
Contents
Foreword . 5
1 Scope . 6
2 Normative references, definitions and symbols . 6
2.1 NO.1 Normative references . 6
3 NO.1 Basis of design . 6
3.2    Requirements of overhead lines . 6
3.2.1  NO.1 Basic requirements . 6
4 Actions on lines. 6
4.1    NO.1 Introduction . 6
4.2    NO.1 Permanent loads . 7
4.3  NO.1 Wind Loads . 7
4.3.1  NO.1 Field of application and basic wind velocity . 7
4.3.2  NO.1 Mean wind velocity . 7
4.3.3  NO.1 Mean wind pressure . 7
4.3.4  NO.1 Turbulence intensity and peak wind pressure . 8
4.3.5  NO.1 Wind forces on any overhead line component . 8
4.4    Wind forces on overhead line components . 8
4.4.1  NO.1 Wind forces on conductors . 8
4.4.1.1 NO.1 General . 9
4.4.1.2 NO.1 Structural factor . 9
4.4.1.3 NO.1 Drag factor . 9
4.4.2  NO.1 Wind forces on insulator sets . 9
4.4.3  NO.1 Wind forces on lattice towers . 10
4.4.4  NO.1 Wind forces on poles . 10
4.5    Ice loads . 10
4.5.1  NO.1 General . 10
4.5.2  NO.1 Ice forces on conductors . 10
4.6   NO.1 Combined wind and ice loads . 11
4.6.1  NO.1 Combined probabilities . 11
4.6.2  NO.1 Drag factors and ice densities . 11

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4.6.3  NO.1 Mean wind pressure and peak wind pressure . 12
4.6.4  NO.1 Equivalent diameter D of ice covered conductor . 13
4.6.5  NO.1 Wind forces on support for ice covered conductors . 13
4.6.6  Combination of wind velocities and ice loads . 13
4.6.6.1 NO.1 Extreme ice load I combined with a high probability wind velocity V 13
T IH
4.6.6.2 NO.1 Nominal ice load I combined with a low probability wind velocity V 13
3 IL
4.7   NO.1 Temperature effects . 13
4.8    Security loads . 14
4.8.1  NO.1 General . 14
4.8.2  NO.1 Torsional loads . 14
4.8.3  NO.1 Longitudinal loads . 14
4.8.4  NO.1 Mechanical conditions of application . 14
4.9    Safety Loads . 14
4.9.1  NO.1 Construction and maintenance loads . 14
4.9.2  NO.1 Loads related to the weight of linesmen . 15
4.10  NO.1 Forces due to short-circuit currents . 15
4.11  Other special forces . 15
4.11.1 NO.1 Avalanches, creeping snow . 15
4.11.2 NO.1 Earthquakes . 15
4.12   Load cases. 16
4.12.1 NO.1 General . 16
4.12.2 NO.1 Standard load cases . 16
4.13   NO.1 Partial factors for actions . 17
5 Electrical requirements . 21
5.6 Load cases for calculation of clearances . 21
5.6.1  NO.1 Load conditions . 21
5.8   Internal clearances within the span and at the top of support . 22
5.9 NO.1 External clearances . 24
6 Earthing systems . 24
6.2 Ratings with regard to corrosion and mechanical strength. 24
6.2.2  NO.1 Earthing and bonding conductors . 24
6.4 Dimensioning with regard to human safety . 24
6.4.1  NO.1 Permissible values . 24
7 Supports . 25

7.1   Initial design consideration . 25
7.1.1  NO.1 Introduction . 25
7.1.2  NO.1 Structural design resistance of a pole . 25
7.1.3  NO.1 Buckling resistance . 25
7.2 NO.1 Materials . 25
7.3 NO.1 Lattice steel towers . 25
7.3.6  NO.1 Ultimate limit states . 26
7.3.6.1 NO.1 General . 26
7.4 NO.1 Steel poles . 26
7.5 Wood poles . 26
7.5.5  Ultimate limit states . 26
7.5.5.1 NO.1 Basis . 26
7.5.7  NO.1 Resistance of connections . 26
7.6 NO.1 Concrete poles. 27
7.7 NO.1 Guyed structures . 27
7.7.1  NO.1 General . 27
7.7.4  Ultimate limit states . 27
7.7.4.1 NO.1 Basis . 27
7.8 Other structures . 27
7.9 NO.1 Corrosion protection and finishes. 27
8 Foundations . 27
8.2 Basis of geotechnical design by (EN 1997-1:2004 – Section2) . 27
8.2.3  Design by prescriptive measures . 27
9     Conductors, earthwires and telecommunication cables . 30
10 Insulators . 30
10.7  NO.1 Mechanical requirements . 31
11 Hardware . 31
11.6   NO.1 Mechanical requirements . 31
12 Quality assurance, checks and taking-over . 31

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European foreword
1 The Norwegian National Committee (NC) is identified by the following address:

Norsk Elektroteknisk Komité
Mustads vei 1, NO-0283 Oslo
Phone no. +47 67 83 31 00
E-mail: Nek@nek.no
2 The Norwegian NC has prepared this Part 2-16 of EN 50341-1:2012, listing the Norwegian
national normative aspects, under its sole responsibility, and duly passed it through the
CENELEC and CLC/TC 11 procedures.

NOTE  The Norwegian NC also takes sole responsibility for the technically correct coordination of this
EN 50341-2-16 with EN 50341-1:2012. It has pe
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