EN 50341-2-1:2020

SLOVENSKI STANDARD
01-junij-2021
Nadzemni električni vodi za izmenične napetosti nad 1 kV - 2-1. del: Nacionalna
normativna določila (NNA) za Avstrijo (na podlagi EN 50341-1:2012)
Overhead electrical lines exceeding AC 1 kV - Part 2-1: National Normative Aspects
(NNAs) for Austria (based on EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-1:2020
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 50341-2-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 29.240.20
English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-1: National
Normative Aspects (NNAs) for Austria (based on
EN 50341-1:2012)
This European Standard was approved by CENELEC on 2020-04-15.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50341-2-1:2020 E
Contents
Page
European foreword . 6
1 Scope . 7
2 Normative references, definitions and symbols . 7
2.1 Normative references . 7
2.2 Definitions . 9
2.3 Symbols . 10
3 Basis of design . 11
3.2 Requirements of overhead electrical lines . 11
3.2.2 Reliability requirements . 11
4 Actions on overhead electrical lines . 11
4.3 Wind loads . 11
4.3.1 Field of application and basic wind velocity . 11
4.3.2 Mean wind velocity . 11
4.3.3 Mean wind pressure . 12
4.3.4 Turbulence intensity and peak wind pressure. 12
4.4 Wind loads on overhead line components . 12
4.4.1 Wind loads on conductors . 12
4.4.2 Wind loads on insulator sets . 12
4.4.3 Wind loads on lattice towers . 13
4.4.4 Wind loads on poles . 13
4.5 Ice loads . 13
4.5.1 General . 13
4.5.2 Ice loads on conductors . 13
4.6 Combined wind and ice loads . 14
4.6.2 Drag factors and ice densities . 14
4.6.3 Mean wind pressure and peak wind pressure . 14
4.6.6 Combination of wind velocities and ice loads . 14
4.7 Temperature effects . 14
4.11 Other special loads . 14
4.12 Load cases . 15
4.12.2 Standard load cases . 15
4.13 Partial factor for actions. 24
5 Electrical requirements . 24
5.2 Currents . 24
5.2.1 Nominal current . 24
5.4 Classification of voltages and overvoltages . 25
5.4.2 Representative power frequency voltages . 25
5.5 Minimum air clearance distances to avoid flashover . 25
5.5.1 General . 25
5.5.3 Empirical method based on European experience . 25
5.6 Load cases for the calculation of clearances . 25
5.6.1 Load conditions . 25
5.6.2 Highest conductor temperature . 25
5.6.3 Wind loads for determination of electrical clearances . 26
5.6.4 Ice loads for determination of electrical clearances . 26
5.6.5 Combined wind and ice loads . 26

Austria – 3/97 – EN 50341-2-1:2020
Page
5.8 Internal clearances within the span and at the top of the support . 26
5.9 External clearances . 28
5.9.1 General . 28
5.9.2 External clearances to ground in areas remote from building, roads, etc. . 32
5.9.3 External clearances to residential and other buildings . 35
5.9.4 External clearances to crossing traffic routes . 50
5.9.6 External clearances to other power lines or overhead telecommunication lines . 62
5.9.7 External clearances to recreational areas (playgrounds, sports grounds, etc.) . 69
5.11 Electrical and magnetic fields . 71
5.11.1 Electrical and magnetic fields under a line . 71
6 Earthing systems . 71
6.4 Dimensioning with regard to human safety . 71
6.4.1 Permissible values for touch voltages . 71
6.4.2 Touch voltage limits at different locations . 71
6.4.3 Basic design of earthing systems with regard to permissible touch voltages . 72
7 Supports . 72
7.1 Initial design considerations . 72
7.1.1 Introduction . 72
7.3 Lattice steel towers . 72
7.4 Steel poles . 73
7.4.7 Serviceability of limit states (EN 1993-1-1:2005, Section 7) . 73
7.4.8 Resistance of connections . 73
7.5 Wood poles . 73
7.5.3 Materials . 73
7.5.4 Durability . 73
7.5.5 Ultimate limit states . 73
7.5.6 Serviceability limit states . 74
7.5.7 Resistance of connections . 74
7.6 Concrete poles . 75
7.6.4 Ultimate limit states . 75
7.6.5 Serviceability limit states . 75
7.6.6 Design assisted by testing . 75
7.7 Guyed structures . 75
7.7.6 Design details for guys . 75
7.8 Other structures . 76
7.10 Maintenance facilities . 76
7.10.3 Safety requirements . 76
8 Foundations . 76
8.1 Introduction . 76
8.2 Basis of geotechnical design (EN 1997-1:2004, Section 2) . 76
8.2.2 Geotechnical design by calculati
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