1、BS EN 50341-2-23:2016Overhead electrical linesexceeding AC 1 kVPart 2-23: National Normative Aspects(NNA) for SLOVAKIA (based on EN50341-1:2012)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 50341-2-23:2016 BRITISH STANDARDNational forewordThis British Standar
2、d is the UK implementation of EN50341-2-23:2016. This standard, together with the followinglist of National Normative Aspect standards, supersedes BS EN50423-3:2005 and BS EN 50341-3:2001:The UK participation in its preparation was entrusted to TechnicalCommittee PEL/11, Overhead Lines.A list of org
3、anizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI Standards Limited 201
4、6ISBN 978 0 580 95801 4ICS 29.240.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2016.Amendments/corrigenda issued since publicationDate Text affect
5、edCountry Code Origin Ref AT Austrian National Committee BS EN 50341-2-1 BE Belgian National Co mmittee BS EN 50341-2-2 CH Swiss National Committee BS EN 50341-2-3 DE German National Committee BS EN 50341-2-4:2016 DK Danish National Committee BS EN 50341-2-5 ES Spanish National Committee BS EN 50341
6、-2-6 FI Finnish National Committee BS EN 50341-2-7:2015 FR French National Committee BS EN 50341-2-8 GB British National Committee BS EN 50341-2-9:2015 GR Greek National Committee BS EN 50341-2-10 IE Irish National Committee BS EN 50341-2-11 IS Iceland National Co mmittee BS EN 50341-2-12 IT Italian
7、 National Committee BS EN 50341-2-13 LU Luxemburg National Committee No NNA available NL Nederlands National Committee BS EN 50341-2-15 NO Norwegian National Committee BS EN 50341-2-16:2016 PT Portuguese National Committee BS EN 50341-2-17 SE Swedish National Committee BS EN 50341-2-18 CZ Czech Nati
8、onal Committee BS EN 50341-2-19:2015 EE Estonian National Committee BS EN 50341-2-20:2015 SI Slovak National Commit tee BS EN 50341-2-21:2016 PL Polish National Committee BS EN 50341-2-22 BS EN 50423-3:2005 and BS EN 50341-3:2001 will be withdrawn upon publication of the rest of the series. BS EN 50
9、341-2-23:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50341-2-23 December 2016 ICS 29.240.20 English Version Overhead electrical lines exceeding AC 1 kV - Part 2-23: National Normative Aspects (NNA) for SLOVAKIA (based on EN 50341-1:2012) Lignes lectriques ariennes dpassant 1 kV en coura
10、nt alternatif - Partie 2-23: Aspects normatifs nationaux pour la SLOVAQUIE (bas sur lEN 50341-1:2012) This European Standard was approved by CENELEC on 2016-09-20. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European St
11、andard 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 (
12、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 committee
13、s 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, Slove
14、nia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All r
15、ights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50341-2-23:2016 E BS EN 50341-2-23:2016Contents Page 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 2.2 Definiti
16、ons . 10 2.3 Symbols 10 3 Basis of design 12 3.2 Requirements of overhead lines . 12 3.2.2 Reliability requirements 12 3.2.5 Strength coordination 12 3.2.6 Additional considerations 12 4 Actions on lines . 13 4.3 Wind loads 13 4.3.1 Field of application and basic wind velocity 13 4.3.2 Mean wind vel
17、ocity . 13 4.3.3 Mean wind pressure . 13 4.4 Wind forces on overhead line components 13 4.4.1 Wind forces on conductors . 13 4.4.2 Wind forces on insulator sets 14 4.4.3 Wind forces on lattice towers 15 4.4.4 Wind forces on poles 15 4.5 Ice loads 15 4.5.1 General . 15 4.6 Combined wind and ice loads
18、 . 17 4.6.1 Combined probabilities . 17 4.6.2 Drag factors and ice densities 17 4.6.5 Wind forces on support for ice covered conductors . 17 4.6.6 Combination of wind velocities and ice loads . 17 4.7 Temperature effects 18 4.8 Security loads . 18 4.8.1 General . 18 4.8.2 Torsional loads 18 4.8.3 Lo
19、ngitudinal loads . 19 4.9 Safety loads 19 4.9.1 Construction and maintenance loads . 19 4.9.2 Loads related to the weight of linesmen . 19 4.10 Forces due to short-circuit currents 19 4.11 Other special forces 19 4.11.1 Avalanches, creeping snow 19 4.11.2 Earthquakes 20 4.12 Load cases 20 4.12.1 Gen
20、eral . 20 4.12.2 Standard load cases . 20 4.13 Partial factors for actions 21 5 Electrical requirements 25 5.3 Insulation coordination 25 5.4 Classification of voltages and overvoltages 26 5.4.2 Representative power frequency voltages . 26 5.5 Minimum air clearance distances to avoid flashover 26 EN
21、 50341-2-23:2016BS EN 50341-2-23:20165.5.2 Application of the theoretical method in Annex E . 26 5.5.3 Empirical method based on European experience . 26 5.6 Load cases for calculation of clearances . 27 5.6.2 Maximum conductor temperature . 27 5.6.3 Wind loads for determination of electric clearanc
22、es . 27 5.6.4 Ice loads for determination of electric clearances 28 5.6.5 Combined wind and ice loads . 29 5.7 Coordination of conductor positions and electrical stresses 29 5.8 Internal clearances within the span and at the top of support 30 5.9 External clearances 33 5.9.1 General . 33 5.9.2 Exter
23、nal clearances to ground in areas remote from buildings, roads, etc. . 34 5.9.3 External clearances to residential and other buildings . 34 5.9.4 External clearances to crossing traffic routes . 36 5.9.5 External clearances to adjacent traffic routes 39 5.9.6 External clearances to other power lines
24、 or overhead telecommunication lines . 39 5.10 Corona effect 41 5.10.1 Radio noise . 41 5.11 Electric and magnetic fields 41 5.11.1 Electric and magnetic fields under a line 41 5.11.2 Electric and magnetic field induction 41 5.11.3 Interference with telecommunication circuits 41 6 Earthing systems .
25、 42 6.1 Introduction . 42 6.1.2 Requirements for dimensioning of earthing systems . 42 6.1.3 Earthing measures against lightning effects . 42 6.1.4 Transferred potentials . 43 6.2 Ratings with regard to corrosion and mechanical strength 43 6.2.1 Earth electrodes 43 6.2.2 Earthing and bonding conduct
26、ors . 44 6.4 Dimensioning with regard to human safety 44 6.4.1 Permissible values for touch voltages 44 6.4.3 Basic design of earthing systems with regard to permissible touch voltage 44 7 Supports 45 7.3 Lattice steel towers . 45 7.3.6 Ultimate limit states. 45 7.3.7 Serviceability limit states 45
27、7.3.8 Resistance of connections 45 7.3.9 Design assisted by testing 45 7.4 Steel poles 45 7.4.6 Ultimate limit states (EN 1993-1-1:2005 Chapter 6) 45 7.4.7 Serviceability limit states (EN 1993-1-1:2005 Chapter 7) . 45 7.4.8 Resistance of connections 46 7.4.9 Design assisted by testing 46 7.5 Wood po
28、les . 46 7.5.5 Ultimate limit states. 46 7.5.6 Serviceability limit states 46 7.5.7 Resistance of connections 46 7.5.8 Design assisted by testing 46 7.6 Concrete poles . 46 7.6.4 Ultimate limit states. 46 7.6.5 Serviceability limit states 47 EN 50341-2-23:2016BS EN 50341-2-23:20167.6.6 Design assist
29、ed by testing 47 7.7 Guyed structures 47 7.7.4 Ultimate limit states . 47 7.7.5 Serviceability limit states . 47 7.9 Corrosion protection and finishes . 47 7.9.1 General . 47 7.10 Maintenance facilities . 48 7.10.1 Climbing 48 7.10.2 Maintainability . 48 7.10.3 Safety requirements 48 8 Foundations .
30、 48 8.1 Introduction . 48 8.2 Basis of geotechnical design (EN 1997-1:2004 Section 2) . 48 8.2.2 Geotechnical design by calculation 48 8.3 Soil investigation and geotechnical data (EN 1997-1:2004 Section 3) . 48 9 Conductors and earth-wires 49 9.1 Introduction . 49 9.2 Aluminium based conductors 49
31、9.2.2 Electrical requirements . 49 9.2.3 Conductor service temperatures and grease characteristics . 49 9.2.4 Mechanical requirements 50 9.2.5 Corrosion protection . 50 9.2.6 Test requirements . 50 9.3 Steel based conductors 50 9.3.1 Characteristics and dimensions 50 9.3.3 Conductor service temperat
32、ures and grease characteristics . 51 9.3.4 Mechanical requirements 51 9.3.5 Corrosion protection . 51 9.3.6 Test requirements . 51 9.4 Copper base conductors . 52 9.5 Conductors and ground wires containing optical fibre telecommunication circuits 52 9.5.1 Characteristics and dimensions 52 9.5.2 Elec
33、trical requirements . 52 9.5.3 Conductor service temperatures. 52 9.5.4 Mechanical requirements 52 9.6 General requirements . 53 9.6.2 Partial factor for conductors 53 9.6.3 Minimum cross-sections . 53 9.6.4 Sag tension calculations 53 10 Insulators . 53 10.1 Introduction . 53 10.4 Pollution perform
34、ance requirements . 53 10.5 Power arc requirements 53 10.7 Mechanical requirements 53 10.10 Characteristics and dimensions of insulators . 54 10.11 Type test requirements . 54 10.11.1 Standard type tests . 54 10.11.2 Optional type tests 54 11 Hardware . 55 11.1 Introduction . 55 11.6 Mechanical requ
35、irements 55 12 Quality assurance, checks and taking-over 56 EN 50341-2-23:2016BS EN 50341-2-23:2016Annex H/SK (informative) . 56 Installation and measurements of earthing systems 56 H.2 Basis for the verification . 56 H.2.2 Resistance to earth . 56 H.3 Installation of earth electrodes and earthing c
36、onductors 56 H.3.1 Installation of earth conductors . 56 H.4 Measurements for and on earthing systems 56 H.4.4 Determination of the earth potential rise 56 H.4.5 Reduction factor related to earth wires of overhead lines 56 Annex M/SK (informative) . 57 Geotechnical and structural design of foundatio
37、ns 57 M.1 Typical values of the geotechnical parameters of soils and rocks . 57 M.1.3 Symbols, definitions and units of some ground parameters 57 M.3 Sample semi-empirical models for resistance estimation 63 M.3.1 Geotechnical design by calculation 63 Annex S/SK (informative) . 64 Map of icing zones
38、 in Slovakia . 64 EN 50341-2-23:2016BS EN 50341-2-23:2016European foreword 1. The Slovak National Committee (NC) is identified by the following address:SLOVAK OFFICE OF STANDARDS, METROLOGY AND TESTINGtefanoviova 3P.O.Box 76810 05 Bratislava 15Slovakiaemail: unmsnormoff.gov.sktel: +421 252 496 847te
39、l: +421 252 498 0302. The Slovak National Committee has prepared this Part 2-23 (EN 50341-2-23) listing the SlovakNational Normative Aspects (NNA) under its sole responsibility and duly passed this documentthrough the CENELEC and CLC/TC11 procedures.NOTE The Slovak National Committee also takes sole
40、 responsibility for the technically correct co-ordination of this EN 50341-2-23 with EN 50341-1. It has performed the necessary checks in the frame ofquality assurance/control. However, it is noted that this quality assurance/control has been made in theframework of the general responsibility of The
41、 Slovak National Committee under the national laws/regulations.3. This EN 50341-2-23 is normative in Slovakia and informative for other countries.4. This EN 50341-2-23 has to be read in conjunction with EN 50341-1, hereinafter referred as Part 1.All clause numbers used in Part 2-23 correspond to tho
42、se of Part 1. Specific subclauses which areprefixed SK are to be read as amendments to the relevant text in Part 1. Any necessaryclarification regarding the application of Part 2-23 in conjunction with Part 1 shall be referred to theSlovak Office of Standards, Metrology and Testing that will, in co-
43、operation with CLC/TC11, clarifythe requirements. When no reference is made in Part 2-23 to a specific subclause, then Part 1applies.5. In the case of “boxed values“ defined in Part 1, amended values (if any) which are defined inPart 2-23 shall be taken into account in Slovakia.However, any “boxed v
44、alues” whether in Part 1 or Part 2-23, shall not be amended in direction ofgreater risk in the Project Specification.6. The national Slovak standards/regulations, regarding overhead lines exceeding 1 kV AC, are listedin 2.1/SK.2 and 2.1/SK.3.NOTE All national standards referred to in this Part 2-23
45、will be replaced by the relevant EuropeanStandards as soon as they become available and are declared by the Slovak Office of Standards, Metrologyand Testing to be applicable and thus reported to the secretary of CLC/TC11.EN 50341-2-23:2016BS EN 50341-2-23:20161 Scope 1.1 General (ncpt) SK.1 New over
46、head line As a new overhead line is considered a brand new electric overhead line with nominal voltage exceeding 1 kV AC, between the points A and B. The new branch line of the existing overhead line shall be considered as a new overhead line except for a junction support for which the specific requ
47、irements shall be defined in the Project Specification. The extent of application of this standard in respect of reconstruction, relaying and extension of existing overhead lines shall be determined in the Project Specification. Simultaneously, the Project Specification shall determine, which of the
48、 previous national standards shall be used and to what extent they shall be used for the project in question. 1.2 Field of application (ncpt) SK.1 Field of application The requirements of this standard shall be adopted, where applicable (e.g. requirements on loads, external clearances, etc.), for te
49、lecommunication cables as well. In case of overhead line under the design stage, parties concerned shall agree the extent of the application of this standard. Overhead line under construction may be completed according to standards valid during the design stage of the line. The parties concerned shall agree any possible application of certain clauses of this standard. (ncpt) SK.2 Installation of telecommunication equipment on supports Provisions of this standard also apply to the telecommunication equipment and devices (aerials, dish antennas, etc.) which are
