BS EN 50341-1-2012 Overhead electrical lines exceeding AC 1 kV General requirements Common specifications《大于交流1 kV的架空电气线路 一般要求 通用规范》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50341-1:2012Overhead electrical linesexceeding AC 1 kV -Part 1: General requirements CommonspecificationsCopyright European Committee for Electrotechnical Standardization P

2、rovided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50341-1:2012.It supersedes BS EN 50341-1:2001+A1:2009 and BS EN 50423-1

3、:2005which are withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/11, Overhead Lines.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a c

4、ontract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013 ISBN 978 0 580 78410 1 ICS 29.240.20 Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the

5、 authority of theStandards Policy and Strategy Committee on 31 January 2013. Amendments issued since publicationDate T e x t a f f e c t e dCopyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitte

6、d without license from IHS-,-,-BS EN 50341-1:2012EUROPEAN STANDARD EN 50341-1 NORME EUROPENNE EUROPISCHE NORM December 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Cent

7、re: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50341-1:2012 E ICS 29.240.20 Supersedes EN 50341-1:2001 + A1:2009, EN 50423-1:2005 English version Overhead electrical lines exceeding AC

8、 1 kV - Part 1: General requirements - Common specifications Lignes lectriques ariennes dpassant AC 1 kV - Partie 1: Rgles gnrales - Spcifications communes Freileitungen ber AC 1 kV - Teil 1: Allgemeine Anforderungen - Gemeinsame Festlegungen This European Standard was approved by CENELEC on 2012-11

9、-19. 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 obta

10、ined 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 t

11、o 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

12、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Electrotechnical Standardization Provided by IHS under license

13、 with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012EN 50341-1:2012 - 2 - Contents Foreword .17 0 Introduction.18 0.1 Detailed structure of the standard 18 0.2 Part 1: General requirements - Common specifications .18 0.3 Part 2: National

14、Normative Aspects 18 0.4 A-deviations .18 0.5 Special national conditions (snc) 18 0.6 National complements (NCPTs) 18 0.7 Language .18 1 Scope .19 1.1 General .19 1.2 Field of application .19 1.3 Structure of the European Standard EN 50341-1 .19 2 Normative references, definitions and symbols .20 2

15、.1 Normative references .20 2.2 Definitions 26 2.3 Symbols .35 3 Basis of design .43 3.1 Introduction .43 3.2 Requirements of overhead lines .44 3.2.1 Basic requirements 44 3.2.2 Reliability requirements .45 3.2.3 Security requirements 46 3.2.4 Safety requirements .47 3.2.5 Strength coordination .47

16、 3.2.6 Additional considerations .47 3.2.7 Design working life .47 3.2.8 Durability 47 3.2.9 Quality assurance 47 3.3 Limit states 47 3.3.1 General 47 3.3.2 Ultimate limit states 47 3.3.3 Serviceability limit states48 3.4 Actions .48 3.4.1 Principal classifications 48 3.4.2 Classification of actions

17、 by their variation in time 48 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012- 3 - EN 50341-1:2012 3.4.3 Classification of actions by the

18、ir nature and/or the structural response 49 3.5 Characteristic values 49 3.5.1 Characteristic value of an action .49 3.5.1.1 Action (F) 49 3.5.1.2 Permanent action (G) .49 3.5.1.3 Variable action (Q) 49 3.5.1.4 Accidental action (A) .49 3.5.2 Characteristic value of a material property 49 3.6 Design

19、 values 49 3.6.1 General 49 3.6.2 Design value of an action 49 3.6.3 Design value of a material property .50 3.6.4 Combination value of a variable action 50 3.7 Partial factor method and design formula 50 3.7.1 Partial factor method 50 3.7.2 Basic design formula .51 3.7.3 Total design value of the e

20、ffect of combined actions 51 3.7.3.1 General .51 3.7.3.2 Design situations related to permanent and variable actions .51 3.7.3.3 Design situations related to permanent, variable and accidental actions.51 3.7.4 Structural design resistance 52 4 Actions on lines 53 4.1 Introduction .53 4.2 Permanent l

21、oads .55 4.3 Wind loads .55 4.3.1 Field of application and basic wind velocity .55 4.3.2 Mean wind velocity 55 4.3.3 Mean wind pressure 56 4.3.4 Turbulence intensity and peak wind pressure .57 4.3.5 Wind forces on any overhead line component 57 4.4 Wind forces on overhead line components .58 4.4.1 W

22、ind forces on conductors 58 4.4.1.1 General .58 4.4.1.2 Structural factor.60 4.4.1.3 Drag factor 63 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 503

23、41-1:2012EN 50341-1:2012 - 4 - 4.4.2 Wind forces on insulator sets 63 4.4.3 Wind forces on lattice towers .64 4.4.3.1 General .64 4.4.3.2 Method 1 .64 4.4.3.3 Method 2 .67 4.4.4 Wind forces on poles .68 4.5 Ice loads .69 4.5.1 General 69 4.5.2 Ice forces on conductors69 4.6 Combined wind and ice loa

24、ds .70 4.6.1 Combined probabilities 70 4.6.2 Drag factors and ice densities .71 4.6.3 Mean wind pressure and peak wind pressure .72 4.6.4 Equivalent diameter D of ice covered conductor .72 4.6.5 Wind forces on support for ice covered conductors 72 4.6.6 Combination of wind velocities and ice loads 7

25、3 4.6.6.1 Extreme ice load ITcombined with a high probability wind velocity VIH73 4.6.6.2 Nominal ice load I3 combined with a low probability wind velocity VIL73 4.7 Temperature effects 74 4.8 Security loads 74 4.8.1 General 74 4.8.2 Torsional loads 74 4.8.3 Longitudinal loads 75 4.8.4 Mechanical co

26、nditions of application .75 4.9 Safety Loads 75 4.9.1 Construction and maintenance loads 75 4.9.2 Loads related to the weight of linesmen 75 4.10 Forces due to short-circuit currents .76 4.11 Other special forces 76 4.11.1 Avalanches, creeping snow .76 4.11.2 Earthquakes .76 4.12 Load cases .76 4.12

27、.1 General 76 4.12.2 Standard load cases 77 4.13 Partial factors for actions .80 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012- 5 - EN 5

28、0341-1:2012 5 Electrical requirements 81 5.1 Introduction .81 5.2 Currents .82 5.2.1 Normal current .82 5.2.2 Short-circuit current .82 5.3 Insulation co-ordination .83 5.4 Classification of voltages and overvoltages 83 5.4.1 General 83 5.4.2 Representative power frequency voltages 83 5.4.3 Represen

29、tative temporary overvoltages 84 5.4.4 Representative slow-front overvoltages 84 5.4.5 Representative fast-front overvoltages 85 5.5 Minimum air clearance distances to avoid flashover 85 5.5.1 General 85 5.5.2 Application of the theoretical method in Annex E 86 5.5.3 Empirical method based on Europe

30、an experience 89 5.6 Load cases for calculation of clearances .90 5.6.1 Load conditions 90 5.6.2 Maximum conductor temperature 90 5.6.3 Wind loads for determination of electric clearances 90 5.6.3.1 Wind load cases90 5.6.3.2 Nominal wind loads for determination of internal and external clearances 91

31、 5.6.3.3 Extreme wind loads for determination of internal clearances .91 5.6.4 Ice loads for determination of electric clearances .91 5.6.5 Combined wind and ice loads 91 5.7 Coordination of conductor positions and electrical stresses 91 5.8 Internal clearances within the span and at the top of supp

32、ort.92 5.9 External clearances 96 5.9.1 General 96 5.9.2 External clearances to ground in areas remote from buildings, roads, etc. 97 5.9.3 External clearances to residential and other buildings 98 5.9.4 External clearances to crossing traffic routes 99 5.9.5 External clearances to adjacent traffic

33、routes100 5.9.6 External clearances to other power lines or overhead telecommunication lines.101 5.9.7 External clearances to recreational areas (playgrounds, sports areas, etc.) 102 5.10 Corona effect .103 Copyright European Committee for Electrotechnical Standardization Provided by IHS under licen

34、se with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012EN 50341-1:2012 - 6 - 5.10.1 Radio noise 103 5.10.1.1 General .103 5.10.1.2 Design influences .103 5.10.1.3 Noise limits 103 5.10.2 Audible noise .103 5.10.2.1 General .103 5.10.2.2 De

35、sign influences .104 5.10.2.3 Noise limit .104 5.10.3 Corona loss 104 5.11 Electric and magnetic fields 104 5.11.1 Electric and magnetic fields under a line .104 5.11.2 Electric and magnetic field induction .105 5.11.3 Interference with telecommunication circuits .105 6 Earthing systems .106 6.1 Int

36、roduction .106 6.1.1 Purpose106 6.1.2 Requirements for dimensioning of earthing systems 106 6.1.3 Earthing measures against lightning effects 107 6.1.4 Transferred potentials 107 6.2 Ratings with regard to corrosion and mechanical strength .107 6.2.1 Earth electrodes .107 6.2.2 Earthing and bonding

37、conductors 107 6.3 Dimensioning with regard to thermal strength 107 6.3.1 General 107 6.3.2 Current rating calculation .108 6.4 Dimensioning with regard to human safety .108 6.4.1 Permissible values for touch voltages .108 6.4.2 Touch voltage limits at different locations108 6.4.3 Basic design of ea

38、rthing systems with regard to permissible touch voltage .110 6.4.4 Measures in systems with isolated neutral or resonant earthing 112 6.5 Site inspection and documentation of earthing systems .112 7 Supports 113 7.1 Initial design considerations .113 7.1.1 Introduction 113 7.1.2 Structural design re

39、sistance of a pole .113 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012- 7 - EN 50341-1:2012 7.1.3 Buckling Resistance 113 7.2 Materials .

40、113 7.2.1 Steel materials, bolts, nuts and washers, welding consumables 113 7.2.2 Cold formed steel .113 7.2.3 Requirements for steel grades subject to galvanising .113 7.2.4 Holding-down bolts 113 7.2.5 Concrete and reinforcing steel .114 7.2.6 Wood114 7.2.7 Guy materials .114 7.2.8 Other materials

41、 114 7.3 Lattice steel towers .114 7.3.1 General 114 7.3.2 Basis of design 114 7.3.3 Materials 114 7.3.4 Durability 114 7.3.5 Structural analysis .114 7.3.6 Ultimate limit states 115 7.3.6.1 General .115 7.3.6.2 Resistance of cross section areas 116 7.3.6.3 Tension, bending and compression resistanc

42、e of members 116 7.3.6.4 Buckling resistance of members in compression .117 7.3.6.5 Buckling resistance of members in bending .117 7.3.7 Serviceability limit states117 7.3.8 Resistance of connections .117 7.3.9 Design assisted by testing .117 7.3.10 Fatigue .117 7.4 Steel poles .118 7.4.1 General 11

43、8 7.4.2 Basis of design (EN 1993-1-1:2005 Chapter 2) .118 7.4.3 Materials (EN 1993-1-1:2005 Chapter 3) .118 7.4.4 Durability (EN 1993-1-1:2005 Chapter 4) .118 7.4.5 Structural analysis (EN 1993-1-1:2005 Chapter 5) 118 7.4.6 Ultimate limit states (EN 1993-1-1:2005 Chapter 6) .118 7.4.6.1 General .118

44、 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012EN 50341-1:2012 - 8 - 7.4.6.2 Resistance of cross section areas 119 7.4.7 Serviceability l

45、imit states (EN 1993-1-1:2005 Chapter 7) .119 7.4.8 Resistance of connections .119 7.4.8.1 Basis .119 7.4.8.2 Bolts (other than holding-down bolts) .119 7.4.8.3 Slip joint connections 119 7.4.8.4 Flanged bolted connections 120 7.4.8.5 Welded connections .120 7.4.8.6 Direct embedding into the concret

46、e 120 7.4.8.7 Base plate and holding-down bolts .120 7.4.9 Design assisted by testing .121 7.5 Wood poles 121 7.5.1 General 121 7.5.2 Basis of design 121 7.5.3 Materials 121 7.5.4 Durability 121 7.5.5 Ultimate limit states 121 7.5.5.1 Basis .121 7.5.5.2 Calculation of internal forces and moments .12

47、1 7.5.5.3 Resistance of wood elements .122 7.5.5.4 Decay conditions 122 7.5.6 Serviceability limit states123 7.5.7 Resistance of connections .123 7.5.8 Design assisted by testing .123 7.6 Concrete poles 123 7.6.1 General 123 7.6.2 Basis of design 123 7.6.2.1 General rules 123 7.6.2.2 Design load .12

48、3 7.6.2.3 Lateral reinforcement 124 7.6.3 Materials 124 7.6.4 Ultimate limit states 124 7.6.5 Serviceability limit states124 7.6.6 Design assisted by testing .124 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50341-1:2012- 9 - EN 50341-1:2012 7.7 Guyed structures 125 7.7.1 General 125 7.7.2 Basis of design 125 7.7.3 Materials 125 7.7.4 Ultimate limit states 125 7.7.4.1 Basis .125 7.7.4.2 Calculation of internal forces and