EN 50341-2-6:2017

SLOVENSKI STANDARD
01-februar-2018
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Overhead electrical lines exceeding AC 1 kV - Part 2-6: National Normative Aspects
(NNA) for SPAIN (based on EN 50341-1:2012)
Lignes électriques aériennes dépassant 1 kV en courant alternatif - Partie 2-6: Aspects
normatifs nationaux (NNA)pour l'ESPAGNE (basé sur l'EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-6:2017
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 50341-2-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2017
ICS 29.240.20
English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-6:
National Normative Aspects (NNA) for SPAIN
(based on EN 50341-1:2012)
Lignes électriques aériennes dépassant 1 kV en courant
alternatif - Partie 2-13: Aspects normatifs nationaux
(NNA)pour l'ESPAGNE (basé sur l'EN 50341-1:2012)
This European Standard was approved by CENELEC on 2017-02-01.
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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50341-2-6:2017 E
Contents
Page
1 SCOPE 6
1.1 General . 6
1.2 Field of application . 6
2 NORMATIVE REFERENCES, DEFINITIONS AND SYMBOLS 6
2.1 Normative references . 6
2.3 Symbols . 6
3 BASIS OF DESIGN 7
3.2 Requirements of overhead lines . 7
3.2.2 Reliability requirements . 7
3.2.5 Strength coordination . 7
3.6 Design values . 7
3.6.2 Design value of an action . 7
3.6.3 Design value of a material property . 7
3.7 Partial factor method and design formula . 7
3.7.2 Basic design formula . 7
4 ACTIONS ON LINES 8
4.1 Introduction . 8
4.2 Permanent loads . 8
4.3 Wind loads . 8
4.3.1 Field of application and basic wind velocity . 8
4.3.5 Wind forces on any overhead line component . 8
4.4 Wind forces on overhead line components . 10
4.5 Ice loads . 10
4.5.2 Ice forces on conductors . 10
4.7 Temperature effects . 10
4.8 Security loads . 10
4.8.1 General . 10
4.8.2 Torsional loads . 11
4.8.3 Longitudinal loads . 11
4.12 Load cases . 12
4.12.1 General . 12
4.12.2 Standard load cases . 12
4.13 Partial factors for actions . 12
5 ELECTRICAL REQUIREMENTS 13
5.2 Currents . 13
5.2.1 Normal current. 13
5.3 Insulation co-ordination . 14
5.4 Classification of voltages and overvoltages . 17

Spain - 3 - EN 50341-2-6:2017
Page
5.4.2 Representative power frequency voltages . 17
5.5 Minimum air clearance distances to avoid flashovers. 18
5.6 Load cases for calculation of clearances . 19
5.6.1 Load conditions . 19
5.8 Internal clearances within the span and at the top of support . 19
5.9 External clearances . 21
5.9.1 General . 21
5.9.2 External clearances to ground in areas remote from buildings, roads, etc. . 22
5.9.3 External clearances to residential and other buildings . 23
5.9.4 External clearances to crossing traffic routes . 24
5.9.5 External clearances to adjacent traffic routes . 25
5.9.6 External clearances to other power lines or overhead telecommunication lines . 26
5.9.7 External clearances to recreational areas (playgrounds, sports areas, etc.) . 29
6 EARTHING SYSTEMS 29
6.1 Introduction . 29
6.1.2 Requirements for dimensioning of earthing systems . 29
6.1.3 Earthing measures against lightning effects . 30
6.2 Ratings with regards to corrosion and mechanical strength . 30
6.2.2 Earthing and bonding conductors . 30
6.3 Dimensioning with regard to thermal strength . 30
6.3.1 General . 30
6.3.2 Current rating calculation . 31
6.4 Dimensioning with regard to human safety . 31
6.4.1 Permissible values for touch voltage . 31
6.4.3 Basic design of earthing systems with regard to permissible touch voltage . 31
6.5 Site inspection and documentation of earthing systems . 32
7 SUPPORTS 33
7.2 Materials . 33
7.2.1 Steel materials, bolts, nuts and washers, welding consumables . 33
7.2.5 Concrete and reinforced steel . 33
7.2.6 Wood . 33
7.3 Lattice steel towers . 33
7.3.1 General . 33
7.3.6 Ultimate limit states . 34
7.3.8 Resistance of connections . 34
7.3.9 Design assisted by testing . 34
7.4 Steel poles . 35
7.4.1 General . 35
7.4.2 Basis of design (EN 1993-1-1:2005 - Chapter 2) . 35
7.4.6 Ultimate limit states (EN 1993-1-1:2005 - Chapter 6) . 35
7.4.8 Resistance of connections . 35

Page
7.4.9 Design assisted by testing . 35
7.5 Wood poles . 36
7.5.1 General . 36
7.5.2 Basis of design . 36
7.5.5 Ultimate limit states . 36
7.6 Concrete poles . 36
7.6.1 General . 36
7.6.4 Ultimate limit states . 36
7.6.5 Serviceability limit states . 36
7.6.6 Design assisted by testing . 36
7.7 Guyed structures . 37
7.7.1 General . 37
7.7.4 Ultimate limit states . 37
7.8 Other structures. 37
8 F
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