SIST EN 50341-2-18:2018

SLOVENSKI STANDARD
SIST EN 50341-2-18:2018
01-februar-2018
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Overhead electrical lines exceeding AC 1 kV - Part 2-18: National Normative Aspects
(NNA) for Sweden (based on EN 50341-1:2012)
Lignes électriques aériennes dépassant 1 kV en courant alternatif - Partie 2-18 : Aspects
Normatifs Nationaux (NNA) pour la Suède (sur la base de l'EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-18:2016
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN 50341-2-18:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50341-2-18:2018

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SIST EN 50341-2-18:2018


EUROPEAN STANDARD EN 50341-2-18

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2016
ICS 29.240.20

English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-18:
National Normative Aspects (NNA) for Sweden (based on EN
50341-1:2012)
Lignes électriques aériennes dépassant 1 kV en courant
alternatif - Partie 2-18 : Aspects Normatifs Nationaux (NNA)
pour la Suède (sur la base de l'EN 50341-1:2012)
This European Standard was approved by CENELEC on 2016-11-01. 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 50341-2-18:2016 E

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SIST EN 50341-2-18:2018
Sweden 2/85 EN 50341-2-18:2016
Foreword . 7
1 Scope . 8
2 Normative references, definitions and symbols . 8
2.1 Normative references . 8
2.2 Definitions . 11
2.3 Symbols . 11
3 Basis of design . 12
3.2 Requirements of overhead lines . 12
3.2.2 Reliability requirements . 12
3.6 Design values . 13
3.6.2 Design values of an action . 13
3.7 Partial factor method and design formula . 13
3.7.3.2 Design situations related to permanent and variable actions . 13
3.7.3.3 Design situations related to permanent, variable and accidental actions 14
4 Actions on lines . 14
4.1 Introduction . 14
4.3 Wind loads . 14
4.3.4 Turbulence intensity and peak wind pressure . 14
4.4 Wind forces on overhead line components . 14
4.4.1 Wind forces on conductors . 14
4.4.1.1 General . 14
4.4.1.2 Structural factor . 15
4.4.1.3 Drag factor . 15
4.4.2 Wind forces on insulator sets . 15
4.4.3 Wind forces on lattice towers . 15
4.4.3.1 General . 15
4.4.3.2 Method 1 . 15
4.4.3.3 Method 2 . 16
4.4.4 Wind forces on poles . 16
4.5 Ice load . 16
4.5.2 Ice forces on conductors . 16
4.6 Combined wind and ice loads . 18
4.6.2 Drag factors and ice densities . 18
4.6.3 Mean wind pressure and peak wind pressure . 18
4.6.4 Equivalent diameter D of ice covered conductor . 18
4.7 Temperature effects . 18
4.8 Security loads . 19

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SIST EN 50341-2-18:2018
Sweden - 3/85 - EN 50341-2-18:2016
4.9 Safety loads . 19
4.9.1 Construction and maintenance loads . 19
4.12 Load cases . 19
4.12.2 Standard load cases . 19
4.13 Partial factors for actions . 24
5 Electrical requirements . 26
5.3 Insulation co-ordination . 26
5.4 Classification of voltages and overvoltages . 27
5.5 Minimum air clearance distances to avoid flashover . 28
5.6 Load cases for calculation of clearances . 30
5.8 Minimum internal clearances within the span and at the top of support. 34
5.9 External clearances . 39
5.9.1 General . 39
5.9.2 External clearances to ground in areas remote from buildings, roads, etc.
. 40
5.9.3 External clearances to residential and other buildings . 43
5.9.4 External clearances to crossing traffic routes . 44
5.9.6 External clearances to other power lines or overhead telecommunication
lines. 46
5.9.7 External clearances to recreational areas (playgrounds, sports areas,
etc.) . 50
6 Earthing systems . 51
6.1 Introduction . 51
6.1.3 Earthing measures against lightning effects . 51
6.1.4 Transferred potentials . 51
6.2 Ratings with regard to corrosion and mechanical strength . 51
6.2.1 Earth electrodes . 51
6.2.2 Earthing and bonding conductors . 52
6.4 Dimensioning with regard to human safety . 52
6.4.3 Basic design of earthing systems with regard to permissible touch voltage
. 52
6.4.4 Measures in systems with isolated neutral or resonant earthing . 54
7 Supports . 54
7.1 Initial design considerations . 54
7.2 Materials . 54
7.2.1 Steel materials, bolts, nuts and washers, welding consumables . 54
7.2.6 Wood . 54
7.3 Lattice steel towers . 55
7.3.1 General . 55

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SIST EN 50341-2-18:2018
EN 50341-2-18:2016 - 4/85 - Sweden
7.3.3 Materials . 55
7.3.6 Ultimate limit states . 55
7.3.6.1 General . 55
7.3.6.3 Tension, bending and compression resistance of members . 55
7.3.6.4 Buckling resistance of members in compression . 55
7.3.8 Resistance of connections . 56
7.4 Steel poles . 56
7.4.1 General . 56
7.4.6.1 Ultimate limit states, General . 56
7.4.8.1 Connections, Basis . 56
7.4.8.2 Bolts (other than holding-down bolts) . 56
7.5 Wood poles . 56
7.5.1 General . 56
7.5.3 Materials . 57
7.5.5 Ultimate limit states . 57
7.5.5.2 Calculation of internal forces and moments . 57
7.5.5.3 Resistance of wood elements . 57
7.5.5.4 Decay conditions . 58
7.5.7 Resistance of connections . 58
7.5.8 Design assisted by testing . 58
7.6 Concrete poles . 58
7.6.1 General . 58
7.6.2 Basis of design . 59
7.6.3 Materials . 59
7.6.4 Ultimate limit states . 59
7.6.5 Serviceability limit states . 59
7.6.6 Design assisted by testing . 60
7.7 Guyed structures. 60
7.7.3 Materials . 60
7.7.4.1 Ultimate limit states, Basis . 60
7.7.4.2 Calculation of internal forces and moments . 60
7.7.4.3 Second order analysis . 60
7.7.6 Design details for guys . 61
7.8 Other structures . 61
7.9 Corrosion protection and finishes . 65
7.9.2 Galvanising . 66
7.9.3 Metal spraying . 66
7.9.6 Use of weather-resistant steels . 66
7.9.7 Protection of wood poles . 66

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SIST EN 50341-2-18:2018
Sweden - 5/85 - EN 50341-2-18:2016
7.10 Maintenance facilities . 67
7.10.3 Safety requirements. 67
8 Foundations . 67
8.1 Introduction . 67
8.2 Basis of geotechnical design . 68
8.2.2 Geotechnical design by calculation . 68
8.2.3 Design by prescriptive measures . 69
8.2.4 Load tests and tests on experimental models . 70
8.3 Soil investigation and geotechnical data . 71
8.4 Supervision of construction, monitoring and maintenance . 72
9 Conductors and earth-wires . 72
9.1 Introduction . 72
9.2 Aluminium based conductors . 73
9.2.1 Characteristics and dimensions . 73
9.2.3 Conductor service temperatures and grease performance . 73
9.2.5 Corrosion protection . 73
9.2.6 Test requirements . 74
9.3 Steel based conductors . 74
9.3.1 Characteristics and dimensions . 74
9.3.3 Conductor service temperatures and grease characteristics . 74
9.3.4 Mechanical requirements . 74
9.4 Copper based conductors . 74
9.5 Conductors and ground wires containing optical fibre telecommunication circuits
. 75
9.5.1 Characteristics and dimensions . 75
9.5.3 Conductor service temperatures . 75
9.5.4 Mechanical requirements . 75
9.6 General requirements . 76
9.6.2 Partial factor for conductor . 76
9.6.4 Sag - tension calculations . 76
9.8 Selection, delivery and installation of conductors . 79
10 Insulators . 79
10.2 Standard electrical requirements . 79
10.7 Mechanical requirements . 80
10.10 Characteristics and dimensions of insulators . 80
10.16 Selection, delivery and installation of insulators . 80
11 Hardware . 81
11.2 Electrical requirements . 81

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SIST EN 50341-2-18:2018
EN 50341-2-18:2016 - 6/85 - Sweden
11.2.2 Requirement applicable to current carrying fittings . 81
11.6 Mechanical requirements . 81
11.7 Durability requirements . 82
11.14 Selection, delivery and installation of fittings . 82
12 Quality assurance, Checks and taking-over . 83
12.2 Checks and taking-over . 83
Annex E Electrical requirements . 84
E.2 Insulation co-ordination . 84
Annex G Earthing systems . 84
G.2 Material constants . 84
Annex J Lattice steel towers . 84
J.5 Design resistance of bolted connections . 84
Annex K Steel poles . 84
K.6 Design of holding-down bolts - Table K.2 . 84
Annex M Geotechnical and structural design of foundations . 85
M.1 Typical values of the geotechnical parameters of soils and rocks . 85
M.2.3 Calculation of R . 85
S
M.2.4 Analytical evaluation of R . 85
d

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SIST EN 50341-2-18:2018
Sweden 7/85 EN 50341-2-18:2016
European foreword
1 The Swedish National Committee (NC) is identified by the following address:
SEK Svensk Elstandard - TK11 Overhead Lines
Box 1284
SE-164 29 KISTA
Telephone no.: +46 8 444 14 00
Facsimile no.: +46 8 444 14 30
E-mail sek@elstandard.se
2 The Swedish NC has prepared this Part 2-18 of EN 50341, listing the Swedish national
normative aspects (NNA), under the sole responsibility, and duly passed it through the
CENELEC and CLC/TC 11 procedures.
NOTE The Swedish NC also takes the sole responsibility for the technically correct co-ordination of this
EN 50341-2-18 with EN 50341. It has performed the necessary checks in the frame of quality
assurance/control. It is noted however that this quality assurance/control has been made in the
framework of the general responsibility of a standard committee under the national laws/regulations.
3 This NNA is normative in Sweden and informative in other countries.
4 This NNA has to be read in conjunction with Part 1 (EN 50341-1). All clause numbers used
in this NNA correspond to those of Part 1. Specific subclauses, which are prefixed "SE", are
to be read as amendments to the relevant text in Part 1. Any necessary clarification
regarding the application of this NNA in conjunction with Part 1 shall be referred to the
Swedish NC who will, in co-operation with CLC/TC 11 clarify the requirements.
When no reference is made in this NNA to a specific subclause, then Part 1 applies.
5 In the case of "boxed values" defined in Part 1, amended values (if any), which are defined
in this NNA shall be taken into account in Sweden.
However, any boxed value, whether in Part 1 or in this NNA, shall not be amended in the
direction of greater risk in a Project Specification.
6 The national Swedish standards / regulations related to overhead electrical lines exceeding
1 kV (AC) are listed in subclause 2.1/SE
NOTE All national standards referred to in this NNA will be replaced by the relevant European Standards as
soon as they become available and are declared by the Swedish NC to be applicable and thus
reported to the secretary of CLC/TC 11.

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SIST EN 50341-2-18:2018
EN 50341-2-18:2016 - 8/85 - Sweden

1 Scope
(ncpt)
SE.1 Application to existing overhead lines
This Part 2-18 is applicable for new overhead lines only and not for existing lines.
(A-dev)
SE.2 Maintenance, rebuilding or extension of an overhead line
Measures related to maintenance of the electrical installation shall fulfill the legislation in force when it
was erected. In the case of a rebuilding or extension of an electrical installation (overhead line), the
regulations in force shall be applied for the rebuilding or extension. (ELSÄK-FS 2008:1)
(ncpt)
SE.3 Replacement
This Part 2-18 replaces the Swedish Standards SS-EN 50341-3-18, edition 1 and SS-EN 50423-3-18,
edition 3.
(ncpt)
SE.4 Optical ground wire (OPGW) and optical phase conductor (OPCON)
This Part 2-18 is applicable for installation of OPGW and OPCON, also known as OPPC, in overhead
lines in Sweden.
(ncpt)
SE.5 All dielectric self supporting optical cable (ADSS) and optical attached cable (OPAC)
This Part 2-18 is applicable for installation of ADSS and OPAC in overhead lines in Sweden.
NOTE The allowable electrical field for the ADSS cable should be taken into consideration when the conductor
configuration is determined.
2 Normative references, definitions and symbols
2.1 Normative references
(A-dev)
SE.1 National normative laws, government regulations
Reference Title
ELSÄK-FS 2008:1 Elsäkerhetsverkets föreskrifter om hur starkströmsanläggningar ska vara
utförda
The Swedish National Electrical Safety Board - Regulations regarding
design, and erection of electrical installations
ELSÄK FS 2008:3 Elsäkerhetsverkets föreskrifter om innehavarens kontroll av elektriska
starkströmsanläggningar och elektriska anordningar
The Swedish National Electrical Safety Board - Regulations regarding
supervision of the electrical installation by the possessor
SFS 2009:22 Starkströmsförordning
The Swedish Government - Ordinance concerning electrical installations
BFS 2011:10 - EKS Boverkets föreskrifter och allmänna råd om tillämpning av europeiska
konstruktionsstandarder (eurokoder)
Swedish National Board of Housing, Building and Planning: Application
of the European design standards
NOTE If there is associated amendment instructions to the documents listed above, they shall be included.

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SIST EN 50341-2-18:2018
Sweden - 9/85 - EN 50341-2-18:2016

(ncpt)
SE.2 National normative standards referred to in this NNA
Reference Title
SS-EN 335:2013 Träskydd - Definitioner och tillämpning av användningsklasser - Massivt
trä och träbaserade produkter
Durability of wood and wood-based products — Use classes: definitions,
application to solid wood and wood-based products
SS-EN 351-1:2007 Träskydd – Träskyddsbehandlat massivt trä – Del 1: Klassificering och
upptagning av träskyddsmedel
Durability of wood and wood-based products – Preservative-treated solid
wood – Part 1: Classification of preservative penetration and retention
SS-ISO 965-4 Metriska ISO-gängor för allmän användning – Gängtoleranser - Del 4:
Gränsmått för varmförzinkade utvändiga gängor avsedda för användning
tillsammans med invändiga gängor gängade till toleranskvalitet H eller G
efter förzinkning
ISO general purpose metric screw threads - Tolerances - Part 4: Limits
of sizes for hot-dip galvanized external screw threads to mate with
internal screw threads tapped with tolerance position H or G after
galvanizing
SS-EN 1090-2:2008 Utförande av stål- och aluminiumkonstruktioner – Del 2:
Stålkonstruktioner
Execution of steel structures and aluminium structures – Part 2:
Technical requirements for steel structures
SS-EN 1999-1-1:2007 Eurokod 9 : Dimensionering av aluminiumkonstruktioner – Del 1-1:
Allmänna regler
Eurocode 9: Design of aluminium structures - Part 1-1: General
structural rules
SS-EN ISO 4892-3:2013 Plast - Metoder för exponering i artificiellt ljus - Del 3: UV lysrör
(ISO 4892-3:2013)
Plastics - Methods of exposure to laboratory light sources - Part 3:
Fluorescent UV lamps (ISO 4892-3:2013)
SS-EN 10164:2005 Stålprodukter med förbättrade deformationsegenskaper i
tjockleksriktningen - Tekniska leveransbestämmelser
Steel products with improved deformation properties perpendicular to
the surface of the product - Technical delivery conditions
SS-EN 10204:2005 Metalliska varor - Typer av kontrolldokument
Metallic products - Types of inspection documents
SS-EN ISO 10684:2004 Fästelement – Varmförzinkning av fästelement
Fasteners – Hot dip galvanized coatings
SS-EN 13670:2009 Betongkonstruktioner – Utförande
Execution of concrete structures
SS-EN 60060 Högspänningsprovning
High-voltage test techniques
SS 11 23 18 Aluminium och stål – Lina till friledning – Kontinuerlig krypprovning
Aluminium and steel – Stranded conductors for overhead lines – n
...