SIST EN 50341-2-1:2021

SLOVENSKI STANDARD
SIST EN 50341-2-1:2021
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
SIST EN 50341-2-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50341-2-1:2021

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SIST EN 50341-2-1:2021


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

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EN 50341-2-1:2020 – 2/97 – Austria
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

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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 calculation . 76
8.2.3 Design by prescriptive measures . 77
8.6 Interactions between support foundations and soil. 77
9 Conductors and earth wires . 77
9.1 Introduction . 77
9.2 Aluminium based conductors . 77
9.3 Steel based conductors . 77

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9.3.1 Characteristics and dimensions . 77
9.3.6 Test requirements . 77
9.5 Conductors and earth wires with optical fibres for telecommunication circuits . 77
9.6 General requirements. 78
9.6.3 Minimum cross sections . 80
9.8 Selection, delivery and installation of conductors . 81
10 Insulators . 81
10.2 Standard electrical requirements . 81
10.7 Mechanical requirements . 81
10.10 Characteristics and dimensions of insulators . 81
10.13 Routine test requirements . 81
11 Hardware . 81
11.2 Electrical requirements . 81
11.2.1 Requirements applicable to all fittings . 81
11.6 Mechanical requirements . 82
11.9 Characteristics and dimensions of fittings . 82
12 Quality assurance, checks and taking-over . 82
Annex G (normative) Calculation methods for earthing systems . 84
G.4 Touch voltage and body current . 84
G.4.1 Equivalence between touch voltage and body current . 84
G.4.2 Calculation taking into account additional resistances . 85
Annex H (informative) Installation and measurements of earthing systems . 86
H.1 Definition of symbols used in this annex . 86
H.2 Basis for the verification . 86
H.2.2 Soil resistivity . 86
H.3 Installation of earth electrodes and earthing conductors . 86
H.3.2 Installation of earthing conductors . 86
H.3.2.1 General . 86
H.3.2.2 Installing the earthing conductors . 87
H.3.2.3 Jointing the earthing conductors . 87
H.4 Measurements for and on earthing systems . 87
H.4.3 Measurement of resistances to earth and impedances to earth . 87
H.4.4 Determination of the earth potential rise . 87
Annex J (normative) Angles in lattice steel towers . 88
J.4 Buckling resistance of angles in compression (see 7.3.6.3) . 88
J.4.1 Flexural buckling resistance . 88
J.5 Design resistance of bolted connections (see 7.3.8) . 88
J.5.1 General . 88
Annex M (informative) Geotechnical and structural design of foundations . 89
M.3 Sample semi-empirical models for resistance estimation . 89
M.3.1 Geotechnical design by estimation . 89
M.3.1.9 Pile foundations . 89
Annex S (normative) Geotechnical foundation design according to practically proved methods
based on characteristic loads . 90
S.1 General conditions . 90
S.2 Soil characteristic values . 91
S.3 Monoblock foundations . 93
S.4 Separate footing foundations . 93

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S.5 Piles and pile-type foundations . 93
S.6 Foundations of wooden poles . 94
Annex T (normative) Supplementary provisions for the design and realisation of concrete and
reinforced concrete foundations . 95
Annex U (normative) Stranded-conductors and cables with telecommunication components carried
along on supports of overhead lines . 96

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EN 50341-2-1:2020 – 6/97 – Austria
European foreword
1 The Austrian National Committee is identified by the following address:
Austrian Electrotechnical Association
Standardization
Eschenbachgasse, 9
A - 1010 Vienna
Austria
phone +43 1 587 63 73-0
Name of the relevant technical body: TK-L Starkstromfreileitungen und Verlegung von Energiekabeln
(Overhead power lines)
2 The Austrian NC and its technical body TK-L “Overhead power lines” of Austrian Electrotechnical
Association (OVE) prepared this Part 2-1 of EN 50341, listing the Austrian National Normative Aspects
(NNA) under its sole responsibility, and duly passed it through the CENELEC and CLC/TC 11
procedures.
NOTE The Austrian NC also takes sole responsibility for the technically correct co-ordination of this
EN 50341-2-1:2020 with EN 50341-1:2012. It performed the necessary checks in the frame of quality
assurance/control. However, it is noted that this quality control was made in the framework of the general
responsibility of a standards committee under the national laws/regulations.
3 This EN 50431-2-1, hereafter referred to as Part 2-1, is normative in Austria and informative in other
countries.
4 This Part 2-1 shall be read in conjunction with EN 50341-1, hereafter referred to as Part 1. All clause
numbers used in this NNA correspond to those of Part 1. Specific subclauses, which are prefixed “AT”,
shall 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 Austrian 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 case of “boxed values” defined in Part 1, amended values, (if any) which are defined in Part 2-1
shall be taken into account in Austria.
However, any “boxed value”, whether in Part 1 or in this Part 2-1, shall not be amended in the direction
of greater risk in a Project Specification.
6 The National Austrian standards/regulations related to overhead electrical lines exceeding 1 kV AC are
listed in 2.1 of this Part 2-1.
NOTE All national standards referred to in this Part 2-1 will be replaced by the relevant European Standards as
soon as they become available and are declared by the austrian NC to be applicable and thus reported to the
secretary of CLC/TC 11.

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1 Scope
1.1 General
(A-dev) AT.1: A new overhead line is defined as the new construction of the totality of all conductors, their
supports together with foundations, earthing grid, insulators, accessories and fittings used for the
overground transport of electrical energy between two points A and B.
1.2 Field of application
(A-dev) AT.1: Stranded-conductors or cable structures with telecommunications components carried on the
line that do not simultaneously function as earth wires or stranded conductors are subject to the
provisions of Annex U.
2 Normative references, definitions and symbols
2.1 Normative references
(A-dev) AT.1: Normative references and other publications
Reference Title

ÖNORM B 1990-1 Eurocode - Basis of structural design - Part 1: Building construction - National
specifications concerning ÖNORM EN 1990 and national supplements

ÖNORM B 1991-1-4 Eurocode 1: Actions on structures - Part 1-4: General actions - Wind actions -
National specifications concerning ÖNORM EN 1991-1-4 and national
supplements

ÖNORM B 1992-1-1 Eurocode 2 - Design of concrete structures - Part 1-1: General rules and rules
for buildings - National specifications concerning ÖNORM EN 1992-1-1,
national comments and national supplements

ÖNORM B 1997-1-1 Eurocode 7: Geotechnical design - Part 1: General rules - National
specifications concerning ÖNORM EN 1997-1 and national supplements

ÖNORM B 1997-1-3 Eurocode 7 - Geotechnical design - Part 1-3: Pile foundations

Electrical overhead lines; galvanized steel stranded conductors
ÖNORM E 4007

Electrical overhead lines; pin insulators type VHD and type VHD-G
ÖNORM E 4101

ÖNORM E 4102 Electrical overhead lines; solid core line post insulators VKSt and VKS

Electrical overhead lines; ball and socket; coupling dimensions
ÖNORM E 4104

Electrical overhead lines; ball and socket; IEC-coupling dimensions
ÖNORM E 4125

ÖNORM EN 1090-1 Execution of steel structures and aluminium structures - Part 1: Assessment
and verification of constancy of performance of steel components and
aluminium components for structural use

Execution of steel structures and aluminium structures - Part 2: Technical
ÖNORM EN 1090-2
requirements for steel structures

ÖNORM EN 12929-1 Safety requirements for cableway installations designed to carry persons -
General requirements - Part 1: Requirements for all installations

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ÖNORM EN 1991-1-4 Eurocode 1: Actions on structures - Part 1-4: General actions - Wind actions

ÖNORM EN 1992-1-1 Eurocode 2: Design of concrete structures - Part 1-1: General rules and rules
for buildings

ÖNORM EN 1993-1-1 Eurocode 3: Design of steel structures - Part 1-1: General rules and rules for
buildings

Eurocode 7: Geotechnical design - Part 1: General rules
ÖNORM EN 1997-1

ÖNORM EN 1997-2 Eurocode 7 - Geotechnical design - Part 2: Ground investigation and testing

Aluminium-clad steel wires for electrical purposes
ÖNORM EN 61232

ÖVE EN 60383-1 Insulators for overhead lines with a nominal voltage above 1 kV - Part 1:
Ceramic or glass insulator units for AC systems - Definitions, test methods
and acceptance criteria

ÖVE EN 60383-2 Insulators for overhead lines with a nominal voltage above 10
...