EN 50341-2-2:2019

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

1 Scope 1.1 General BE.1 Scope of Part 1 and Part 2-2 (ncpt) Part 1 and the present Part 2-2 are only applicable to completely new or completely replaced overhead lines between two points, A and B, as well as to new supports on new foundations with nominal voltages above AC 50 kV. (A-dev) Overhead lines or supports with nominal voltages exceeding AC 1 kV up to and including AC 50 kV are treated as a high voltage of the first category in the General Regulations of the Electrical Installations (GREI) and follow completely the GREI for their dimensioning. 1.2 Field of application (ncpt) BE.1 Application to telecommunication equipment Part 1 and this NNA apply to telecommunication equipment mounted on the new supports (e.g. dishes, antennas), particularly with respect to wind assumptions.

Nadzemni električni vodi za izmenične napetosti nad 1 kV - 2-2. del: Nacionalna normativna določila (NNA) za Belgijo (na podlagi EN 50341-1:2012)

1. del in ta 2-2. del tega standarda se uporabljata samo za povsem nove ali zamenjane nadzemne vode med dvema točkama – A in B – ter za nove nosilce na novih temeljih z nazivno izmenično napetostjo nad 50 kV.

General Information

• Status: Published
• Publication Date: 16-May-2019
• Withdrawal Date: 09-Apr-2022
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: CLC/TC 11 - Overhead electrical lines exceeding 1 kV a.c. (1,5 kV d.c.)
• Drafting Committee: CLC/TC 11 - Overhead electrical lines exceeding 1 kV a.c. (1,5 kV d.c.)
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 17-May-2019
• Completion Date: 17-May-2019
• Ref Project: SIST EN 50341-2-2:2019 - Overhead electrical lines exceeding AC 1 kV - Part 2-2: National Normative Aspects (NNA) for Belgium (based on EN 50341-1:2012)

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2019
Nadzemni električni vodi za izmenične napetosti nad 1 kV - 2-2. del: Nacionalna
normativna določila (NNA) za Belgijo (na podlagi EN 50341-1:2012)
Overhead electrical lines exceeding AC 1 kV - Part 2-2: National Normative Aspects
(NNA) for Belgium (based on EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-2:2019
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 50341-2-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2019
ICS 29.240.20
English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-2: National
Normative Aspects (NNA) for BELGIUM (based on EN 50341-
1:2012)
This European Standard was approved by CENELEC on 2019-04-10.
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: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50341-2-2:2019 E
Contents
European foreword . 6
1 Scope . 7
1.1 General . 7
1.2 Field of application . 7
2 Normative references, definitions and symbols . 7
2.1 Normative references. 7
2.3 Symbols . 8
3 Basis of design . 8
3.2 Requirements of overhead lines . 8
3.2.2 Reliability requirements . 8
4 Actions on lines . 9
4.1 Introduction . 9
4.3 Wind loads . 9
4.3.1 Field of application and basic wind velocity . 9
4.3.2 Mean wind velocity .10
4.3.3 Mean wind pressure .11
4.3.4 Turbulence intensity and peak wind pressure.11
4.4 Wind forces on overhead line components .11
4.4.1 Wind forces on conductors.11
4.4.1.1 General .11
4.4.1.2 Structural factor .11
4.4.1.3 Drag factor .12
4.4.2 Wind forces on insulator sets .12
4.4.3 Wind forces on lattice towers .12
4.4.3.1 General .12
4.4.3.2 Method 1 .12
4.4.4 Wind forces on poles .13
4.5 Ice loads .13
4.5.1 General .13
4.6 Combined wind and ice loads .13
4.6.1 Combined probabilities .13
4.6.2 Drag factors and ice densities .13
4.7 Temperature effects .13
4.8 Security loads .13
4.8.1 General .13
4.8.4 Mechanical conditions of application .14
4.9 Safety loads .14
4.9.1 Construction and maintenance loads .14
4.9.2 Loads related to the weight of linesmen .16
4.10 Forces due to short-circuit currents .16
4.11 Other special forces .16
4.12 Load cases .16

Belgium - 3/29 - EN 50341-2-2:2019
4.12.2 Standard load cases .16
4.13 Partial factors for actions .17
5 Electrical requirements .18
5.1 Introduction .18
5.2 Currents .18
5.2.1 Normal current .18
5.3 Insulation co-ordination .18
5.5 Minimum air clearance distances to avoid flashover .19
5.5.2 Application of the theoretical method in Annex E .19
5.6 Load cases for calculation of clearances .19
5.6.2 Maximum conductor temperature .19
5.6.3 Wind loads for determination of electric clearances .19
5.6.3.2 Nominal wind loads for determination of internal and external
clearances .19
5.6.3.3 Extreme wind loads for determination of internal clearances .20
5.6.4 Ice loads for determination of electric clearances .20
5.8 Internal clearances within the span and at the top of support .20
5.9 External clearances .20
5.9.1 General .20
5.9.2 External clearances to ground in areas remote from buildings, roads, etc. .21
5.9.3 External clearances to residential and other buildings .21
5.9.4 External clearances to crossing traffic routes .21
5.9.5 External clearances to adjacent traffic routes .22
5.9.6 External clearances to other power lines or overhead telecommunication lines .23
5.9.7 External clearances to recreational areas .23
5.10 Corona effect .23
5.10.1 Radio noise .23
5.10.1.3 Noise limit .23
5.10.2 Audible noise .23
5.10.2.3 Noise limit .23
5.11 Electric and magnetic fields .23
5.11.1 Electric and magnetic fields under a line .23
6 Earthing systems .24
6.1 Introduction .24
6.1.3 Earthing measures against lightning effects .24
6.4 Dimensioning with regard to human safety .24
6.4.1 Permissible values for touch voltages .24
7 Supports .24
7.2 Materials .24
7.2.1 Steel materials, bolts, nuts and washers, welding consumables .24
7.3 Lattice steel towers .25
7.3.5 Structural analysis .25
7.3.6 Ultimate limit states .25
7.3.6.1 General .25
7.3.6.4 Buckling resistance of members in compression .25

7.3.6.5 Buckling resistance of members in bending .25
7.3.8 Resistance of connections .26
7.4 Steel poles .26
7.4.3 Materials .26
7.4.6 Ultimate limit states .26
7.4.6.2 Resistance of cross section areas .26
7.4.7 Serviceability limit states .26
7.4.8 Resistance of connections .26
7.4.8.2 Bolts .26
7.4.8.4 Flanged bolted connections .26
7.4.8.7 Base plate and holding-down bolts .26
7.5 Wood poles .26
7.5.1 General .26
7.6 Concrete poles .27
7.6.1 General .27
7.6.4 Ultimate limit states .
...