SIST EN 50341-2-22:2016

SLOVENSKI STANDARD
SIST EN 50341-2-22:2016
01-september-2016
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Overhead electrical lines exceeding AC 1 kV - Part 2-22: National Normative Aspects
(NNA) for Poland (based on EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-22:2016
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN 50341-2-22:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50341-2-22:2016

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SIST EN 50341-2-22:2016


EUROPEAN STANDARD EN 50341-2-22

NORME EUROPÉENNE

EUROPÄISCHE NORM
March 2016
ICS 29.240.20

English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-22:
National Normative Aspects (NNA) for Poland (based on EN
50341-1:2012)

This European Standard was approved by CENELEC on 2016-02-16. 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 50341-2-22:2016 E

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Table of contents
European foreword . 7
1.     Scope . 8
1.1    General . 8
1.2    Field of application . 8
2.     Normative references, definitions and symbols . 8
2.1    Normative references . 8
2.2  Definitions – in alphabetical order in Polish language . 11
2.3  Definitions. 15
3.      Basis of design . 16
3.2 Requirements of overhead lines . 16
3.2.2 Reliability requirements . 16
3.2.3 Security requirements . 16
3.2.8 Durability . 17
3.6 Design values . 16
3.6.2 Design value of an action . 17
4. Action on lines . 17
4.3 Wind loads . 17
4.3.1 Field of application and basic wind velocity . 17
4.3.2 Mean wind velocity . 18
4.3.3 Mean wind pressure . 18
4.3.5 Wind forces on any overhead line component . 18
4.4 Wind forces on overhead line components . 19
4.4.1 Wind forces on conductors . 19
4.4.1.1 General . 20
4.4.1.2 Structural factor . 20
4.4.1.3 Drag factor . 20
4.4.2 Wind forces on insulator sets . 20
4.4.3 Wind forces on lattice towers. . 20
4.4.3.1 General. . 20
4.4.3.2 Method 1 . 20
4.4.4 Wind forces on poles . 20
4.5 Ice loads . 20
4.5.1 General . 20
4.5.2 Ice forces on conductors . 22
4.6 Combined wind and ice loads . 22
4.6.2 Drag factors and ice densities . 22
4.6.3 Mean wind pressure and peak wind pressure . 22
4.6.6 Combination of wind velocities and ice loads . 22
4.6.6.1 Extreme ice load I combined with a high probability wind velocity V . 22
T IH

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4.6.6.2 Nominal ice load I combined with low probability wind velocity V . 22
3 IL
4.7 Temperature effects . 23
4.8 Security loads . 23
4.8.1 General . 23
4.9 Safety loads . 23
4.9.2 Loads related to the weight of linesmen . 23
4.10 Forces due to short – circuit currents. 23
4.12 Load cases . 23
4.12.1 General . 23
4.12.2 Standard load cases . 23
4.13 Partial factors for actions . 25
5.     Electrical requirements . 25
5.2 Currents . 25
5.2.1  Normal current . 26
5.3      Insulation co-ordination.26
5.5      Minimum air clearance distances to avoid flashover . 26
5.5.3  Empirical method based on European experience . 26
5.6    Load cases for calculation of clearances . 26
5.6.2 Maximum conductor temperature. 27
5.6.3 Wind loads for determination of electric clearances . 27
5.6.3.2 Nominal wind loads for determination of internal and external clearances . 27
5.6.3.3 Extreme wind load for determination of internal clearances . 27
5.6.4 Ice loads for determination of electric clearances . 27
5.6.5 Combined wind and ice loads . 28
5.8    Internal clearances within the span and at the top of support . 28
5.9    External clearances . 34
5.9.1  General . 34
5.9.2 External clearances to ground in areas remote from buildings, roads, etc. . 34
5.9.3 External clearances to residential and other buildings . 36
5.9.4 External clearances to crossing traffic routes . 39
5.9.5 External clearances to adjacent traffic routes . 42
5.9.6 External clearances to other power lines or overhead telecommunication lines . 44
5.9.7 External clearances to recreational areas (playgrounds, sport areas, etc.) . 46
5.10    Corona effect . 48
5.10.1  Radio noise . 48
5.10.1.3 Noise limits . 48
5.10.2  Audible noise . 48
5.10.2.3 Noise limits . 48
5.11  Electric and magnetic fields . 49
5.11.1   Electric and magnetic fields under a line . 49
6. Earthing systems . 49
6.1.2 Requirements for dimensioning of earthing systems . 49

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6.1.3 Earthing measures against lightning effects . 49
6.1.4 Transferred potentials . 50
6.2 Ratings with regard to corrosion and mechanical strength . 50
6.2.2 Earthing and bonding conductors. 50
6.3 Dimensioning with regard to thermal strength . 50
6.3.2 Current rating calculation . 50
6.4 Dimensioning with regard to human safety . 50
6.4.1 Permissible values for touch voltages . 50
6.4.3 Basic design of earthing systems with regard to permissible touch voltage . 50
6.4.4 Measures in systems with isolated neutral or resonant earthing . 51
6.5 Site inspection and documentation of earthing systems . 51
7. Supports . 51
7.1 Initial design consideration
7.1.1 Introduction . 51
7.2  Materials
7.2.3 Requirements for steel grades subject to galvanising. 51
7.3 Lattice steel towers . 52
7.3.1 General . 52
7.3.5 Structural analysis . 52
7.3.6 Ultimate limit states . 52
7.3.6.1 General . 52
7.3.6.2 Resistance of cross – section areas . 52
7.3.6.3 Tension, bending and compression resistance of members . 52
7.3.6.4 Buckling resistance of members in compression . 52
7.3.7 Serviceability limit states . 53
7.3.8 Resistance of connections . 53
7.3.9 Design assisted by testing . 53
7.4 Steel poles . 53
7.4.1 General . 53
7.4.5 Structural analysis (EN 1993-1-1:2005 – Chapter 5) . 53
7.4.6 Ultimate limit states (EN 1993-1-1:2005 – Chapter 6) . 53
7.4.6.1 General . 53
7.4.7 Serviceability limit states (EN 1993-1-1:2005 – Chapter 7) . 54
7.4.8 Resistance of connections . 54
7.4.8.2 Bolts (other than holding-down bolts) . 54
7.4.8.4 Flanged bolted connections . 54
7.4.9 Design assisted by testing . 54
7.5 Wood poles . 54
7.5.1 General . 54
7.5.3 Materials . 54
7.5.4 Durability . 55

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7.5.5 Ultimate limit states . 55
7.5.5.3 Resistance of wood elements . 55
7.5.6 Serviceability limit states . 56
7.6 Concrete poles . 56
7.6.1 General . 56
7.6.3 Materials . 56
7.6.4 Ultimate limit states . 57
7.6.5 Serviceability limit states . 57
7.9 Corrosion protection and finishes . 57
7.9.2 Galvanising . 57
7.9.5 Decorative finishes . 57
7.9.7 Protection of wood poles . 57
7.10 Maintenance facilities . 58
7.10.1 Climbing . 58
7.10.2 Maintainability . 58
7.10.3 Safety requirements . 58
7.11 Loading tests . 58
7.12 Assembly and erection . 58
8.     Foundations . 58
8.1 Introduction . 58
8.2 Basis of geotechnical design (EN 1997-1:2004 – Section 2) . 58
8.2.1 General . 58
8.2.2 Geotechnical design by calculation . 59
8.2.4 Load tests and tests on experimental models . 60

8.3 Soil investigation and geotechnical data (EN 1997-1:2004 – Section 3) . 60
9.     Conductors and earth-wires . 61
9.2 Aluminium based conductors . 61
9.2.1 Characteristics and dimensions . 61
9.2.3 Conductor service temperatures and grease characteristics . 61
9.2.4 Mechanical requirements . 62
9.2.5 Corrosion protection . 63
9.3 Steel based conductors . 63
9.3.1 Characteristics and dimensions . 63
9.3.3 Conductor service temperatures and grease characteristics . 63
9.3.4 Mechanical requirements . 64
9.5 Conductors and ground wires containing optical fibre telecommunication circuits . 64
9.5.1 Characteristics and dimensions . 64
9.5.3 Conductor service temperatures . 64
9.5.4 Mechanical requirements . 64
9.5.5 Corrosion protection . 66
9.6 General requirements . 66
9.6.2 Partial factor for conductors . 66

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9.7 Test reports and certificates . 66
10.    Insulators . 66
10.1 Introduction . 66
10.2 Standard electrical requirements . 66
10.3 RIV requirements and corona extinction voltage . 66
10.4 Pollution performance requirements . 66
10.5 Power arc requirements . 67
10.7 Mechanical requirements . 67
11.    Hardware . 68
11.3 RIV requirements and corona extinction voltage . 68
11.5 Short circuit current and power arc requirements . 68
11.6 Mechanical requirements . 68
12. Quality assurance, checks and taking-over . 69
Annex G (normative) – Calculation methods for earthing systems . 69
G.3 Current rating calculation . 69
G.4 Touch voltage and body current . 69
G.4.2 Calculations taking into account additional resistances . 69
Annex H (informative) – Installation and measurements of earthing systems . 70
H.4 Measurements for and on earthing systems . 70
H.4.3 Measurement of resistances to earth and impedances to earth . 70
Annex J (normative) – Angles in lattice steel towers . 70
J.2 General . 70
J.3 Tension resistance of angles connected through one leg (see 7.3.6.2) . 70
Annex K (normative) – Steel poles . 70
K.2 Classification of cross sections (EN 1993-1-1:2005 – 5.5) . 70

K.4 Resistance of circular cross sections .
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