EN 50341-2-4-2016 en Overhead electrical lines exceeding AC 1 kV - Part 2-4 National Normative Aspects (NNA) for Germany.pdf

1、BSI Standards PublicationOverhead electrical lines exceeding AC 1 kVPart 2-4: National Normative Aspects (NNA) for Germany (based on EN 50341-1:2012)BS EN 50341-2-4:2016National forewordThis British Standard is the UK implementation of EN 50341-2-4:2016. Thisstandard, together with the following lis

2、t of National Normative Aspectstandards, supersedes BS EN 50423-3:2005 and BS EN 50341-3:2001:BS EN 50423-3:2005 and BS EN 50341-3:2001 will be withdrawn upon publication of the rest of the series.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/11, Overhead Lines.A li

3、st of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Li

4、mited 2016ISBN 978 0 580 92259 6ICS 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 March 2016.Amendments/corrigenda issued since publicationDate Text

5、affectedBRITISH STANDARDBS EN 50341-2-4:2016Country Code Origin RefAT Austrian National Committee BS EN 50341-2-1BE Belgian National Committee BS EN 50341-2-2CH Swiss National Committee BS EN 50341-2-3DE German National Committee BS EN 50341-2-4:2016DK Danish National Committee BS EN 50341-2-5ES Spa

6、nish National Committee BS EN 50341-2-6FI Finnish National Committee BS EN 50341-2-7:2015FR French National Committee BS EN 50341-2-8GB British National Committee BS EN 50341-2-9:2015GR Greek National Committee BS EN 50341-2-10 IE Irish National Committee BS EN 50341-2-11IS Iceland National Committe

7、e BS EN 50341-2-12IT Italian National Committee BS EN 50341-2-13LU Luxemburg National Committee No NNA available NL Nederlands National Committee BS EN 50341-2-15NO Norwegian National Committee BS EN 50341-2-16 PT Portuguese National Committee BS EN 50341-2-17SE Swedish National Committee BS EN 5034

8、1-2-18 CZ Czech National Committee BS EN 50341-2-19:2015EE Estonian National Committee BS EN 50341-2-20:2015SI Slovak National Committee BS EN 50341-2-21PL Polish National Committee BS EN 50341-2-22EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50341-2-4 January 2016 ICS 29.240.20 English Vers

9、ion Overhead electrical lines exceeding AC 1 kV - Part 2-4: National Normative Aspects (NNA) for Germany (based on EN 50341-1:2012) This European Standard was approved by CENELEC on 2015-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio

10、ns 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 exist

11、s 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 natio

12、nal 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, Port

13、ugal, Romania, Slovakia, Slovenia, 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-10

14、00 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50341-2-4:2016 E BS EN 50341-2-4:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50341-2-4 January 2016 ICS 29.240.20 English Version Overhead electrical line

15、s exceeding AC 1 kV - Part 2-4: National Normative Aspects (NNA) for Germany (based on EN 50341-1:2012) This European Standard was approved by CENELEC on 2015-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

16、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

17、 (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 committ

18、ees 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, Slo

19、venia, 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

20、 rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50341-2-4:2016 E BS EN 50341-2-4:2016EN 50341-2-4:2016 2/90 Germany Contents Page European foreword . 8 1 Scope . 9 1.1 General . 9 1.2 Field of application . 9 2 Normative references, definition

21、s and symbols . 9 2.1 Normative references . 9 2.2 Definitions . 14 2.3 Symbols 19 3 Basis of design . 23 3.2 Requirements of overhead lines 23 3.2.1 Basic requirements . 23 3.2.2 Reliability requirements . 23 3.2.5 Strength coordination 23 3.2.6 Additional considerations 23 3.4 Actions 23 3.4.3 Cla

22、ssification of actions by their nature and/or the structural response . 23 3.6 Design values . 24 3.6.3 Design value of a material property 24 3.6.4 Combination value of a variable action . 24 4 Actions on lines 24 4.1 Introduction . 24 4.3 Wind loads 24 4.4 Wind forces on overhead line components 2

23、7 4.4.1 Wind forces on conductors . 27 4.4.2 Wind forces on insulator sets 29 4.4.3 Wind forces on lattice towers 30 4.4.4 Wind forces on poles . 32 4.5 Ice loads . 32 4.5.2 Ice forces on conductors 32 4.6 Combined wind and ice loads 34 4.6.4 Equivalent diameter D of ice-covered conductor 34 4.6.6 C

24、ombination of wind velocities and ice loads . 34 4.8 Security loads . 34 4.8.1 General 34 4.9 Safety loads 34 4.9.1 Construction and maintenance loads 34 BS EN 50341-2-4:2016Germany 3/90 EN 50341-2-4:2016 Page 4.9.2 Loads related to the weight of lines men. 35 4.10 Forces due to short-circuit curren

25、ts 35 4.11 Other special forces . 35 4.12 Load cases . 35 4.12.1 General 35 4.12.2 Standard load cases 36 4.13 Partial factors for actions 39 5 Electrical requirements . 40 5.2 Currents 40 5.2.1 Normal current . 40 5.4 Classification of voltages and overvoltages . 40 5.4.2 Representative power frequ

26、ency voltages 40 5.5 Minimum air clearance distances to avoid flashover 40 5.5.3 Empirical method based on European experience . 40 5.6 Load cases for calculation of clearances . 40 5.6.3 Wind loads for determination of electric clearances . 40 5.6.4 Ice loads for the determination of electric clear

27、ances . 41 5.6.5 Combined wind and ice loads . 41 5.8 Internal clearances within the span and at the top of support 41 5.9 External clearances 42 5.9.1 General 42 5.9.2 External clearances to ground in areas remote from buildings, roads etc. . 45 5.9.3 External clearances to residential and other bu

28、ildings 45 5.9.4 External clearances to crossing traffic routes . 47 5.9.5 External clearances to adjacent traffic routes . 47 5.9.6 External clearances to other power lines or overhead telecommunication lines 48 5.11 Electric and magnetic fields 48 5.11.1 Electric and magnetic fields under a line.

29、48 5.11.2 Electric and magnetic field Induction . 48 5.11.3 Interference with telecommunication circuits 49 6 Earthing systems 49 6.1 Introduction . 49 6.1.2 Requirements for dimensioning of earthing systems 49 6.1.3 Earthing measures against lightning effects . 51 6.3 Dimensioning with regard to th

30、ermal strength 51 6.3.2 Current rating calculation 51 6.4 Dimensioning with regard to human safety 52 6.4.2 Touch voltage limits at different locations . 52 BS EN 50341-2-4:2016EN 50341-2-4:2016 2/90 Germany Contents Page European foreword . 8 1 Scope . 9 1.1 General . 9 1.2 Field of application . 9

31、 2 Normative references, definitions and symbols . 9 2.1 Normative references . 9 2.2 Definitions . 14 2.3 Symbols 19 3 Basis of design . 23 3.2 Requirements of overhead lines 23 3.2.1 Basic requirements . 23 3.2.2 Reliability requirements . 23 3.2.5 Strength coordination 23 3.2.6 Additional conside

32、rations 23 3.4 Actions 23 3.4.3 Classification of actions by their nature and/or the structural response . 23 3.6 Design values . 24 3.6.3 Design value of a material property 24 3.6.4 Combination value of a variable action . 24 4 Actions on lines 24 4.1 Introduction . 24 4.3 Wind loads 24 4.4 Wind f

33、orces on overhead line components 27 4.4.1 Wind forces on conductors . 27 4.4.2 Wind forces on insulator sets 29 4.4.3 Wind forces on lattice towers 30 4.4.4 Wind forces on poles . 32 4.5 Ice loads . 32 4.5.2 Ice forces on conductors 32 4.6 Combined wind and ice loads 34 4.6.4 Equivalent diameter D

34、of ice-covered conductor 34 4.6.6 Combination of wind velocities and ice loads . 34 4.8 Security loads . 34 4.8.1 General 34 4.9 Safety loads 34 4.9.1 Construction and maintenance loads 34 BS EN 50341-2-4:2016Germany 3/90 EN 50341-2-4:2016 Page 4.9.2 Loads related to the weight of lines men. 35 4.10

35、 Forces due to short-circuit currents 35 4.11 Other special forces . 35 4.12 Load cases . 35 4.12.1 General 35 4.12.2 Standard load cases 36 4.13 Partial factors for actions 39 5 Electrical requirements . 40 5.2 Currents 40 5.2.1 Normal current . 40 5.4 Classification of voltages and overvoltages .

36、40 5.4.2 Representative power frequency voltages 40 5.5 Minimum air clearance distances to avoid flashover 40 5.5.3 Empirical method based on European experience . 40 5.6 Load cases for calculation of clearances . 40 5.6.3 Wind loads for determination of electric clearances . 40 5.6.4 Ice loads for

37、the determination of electric clearances . 41 5.6.5 Combined wind and ice loads . 41 5.8 Internal clearances within the span and at the top of support 41 5.9 External clearances 42 5.9.1 General 42 5.9.2 External clearances to ground in areas remote from buildings, roads etc. . 45 5.9.3 External cle

38、arances to residential and other buildings 45 5.9.4 External clearances to crossing traffic routes . 47 5.9.5 External clearances to adjacent traffic routes . 47 5.9.6 External clearances to other power lines or overhead telecommunication lines 48 5.11 Electric and magnetic fields 48 5.11.1 Electric

39、 and magnetic fields under a line. 48 5.11.2 Electric and magnetic field Induction . 48 5.11.3 Interference with telecommunication circuits 49 6 Earthing systems 49 6.1 Introduction . 49 6.1.2 Requirements for dimensioning of earthing systems 49 6.1.3 Earthing measures against lightning effects . 51

40、 6.3 Dimensioning with regard to thermal strength 51 6.3.2 Current rating calculation 51 6.4 Dimensioning with regard to human safety 52 6.4.2 Touch voltage limits at different locations . 52 BS EN 50341-2-4:2016EN 50341-2-4:2016 4/90 Germany Page 6.4.3 Basic design of earthing systems with regard t

41、o permissible touch voltage . 52 6.4.4 Measures in systems with isolated neutral or resonant earthing 53 6.5 Site inspection and documentation of earthing systems 53 7 Supports . 53 7.1 Initial design considerations . 53 7.2 Materials . 54 7.2.1 Steel materials, bolts, nuts and washers, welding cons

42、umables 54 7.2.6 Wood . 54 7.2.8 Other materials 54 7.3 Lattice steel towers. 54 7.3.1 General 54 7.3.5 Structural analysis . 55 7.3.6 Ultimate limit states . 55 7.3.8 Resistance of connections 55 7.4 Steel poles 57 7.4.1 General 57 7.4.5 Structural analysis . 57 7.4.6 Ultimate limit states . 57 7.4

43、.7 Serviceability limit states . 58 7.4.8 Resistance of connections 58 7.5 Wood poles 58 7.5.2 Basis of design 58 7.5.5 Ultimate limit states . 59 7.5.6 Serviceability limit states . 59 7.5.7 Resistance of connections 59 7.6 Concrete poles . 59 7.6.2 Basis of Design . 59 7.6.2.1 General rules . 59 7

44、.6.4 Ultimate limit states . 59 7.6.5 Serviceability limit states . 60 7.7 Guyed structures 60 7.7.1 General 60 7.7.3 Materials 60 7.8 Other structures 60 7.9 Corrosion protections and finishes . 61 7.9.1 General 61 7.9.2 Galvanising . 61 7.9.4 Paint over galvanising in plant (Duplex system) . 61 7.

45、9.7 Protection of wood poles . 61 7.10 Maintenance facilities . 61 BS EN 50341-2-4:2016Germany 5/90 EN 50341-2-4:2016 Page 7.10.1 Climbing 61 7.10.2 Maintainability 63 7.10.3 Safety requirements 63 8 Foundations 63 8.2 Basis of geotechnical design 63 8.2.2 Geotechnical design by calculation . 63 8.2

46、.3 Design by prescriptive measures 64 8.2.4 Load tests and tests on experimental models . 64 8.6 Interaction between support foundations and soil 64 9 Conductors and earth wires . 65 9.2 Aluminium based conductors . 65 9.2.1 Characteristics and dimensions 65 9.2.3 Conductor service temperatures and

47、grease characteristics 66 9.3 Steel based conductors 66 9.3.1 Characteristics and dimensions 66 9.3.3 Conductor service temperatures and grease characteristics 67 9.3.4 Mechanical requirements 67 9.4 Copper based conductors 68 9.6 General requirements . 69 9.6.2 Partial factor for conductors 69 9.6.

48、3 Minimum cross sections 70 9.6.4 Sag-tension calculations . 70 10 Insulators 71 10.1 Introduction . 71 10.7 Mechanical requirements . 71 10.9 Material selection and specification . 73 10.10 Characteristics and dimensions of insulators . 73 11 Hardware 73 11.1 Introduction . 73 11.2 Electrical requi

49、rements . 73 11.2.1 Requirements applicable to all fittings. 73 11.2.2 Requirements applicable to current carrying fittings . 74 11.6 Mechanical requirements . 74 12 Quality assurance, checks and taking-over . 76 Annex G (normative) Calculation methods for earthing systems 77 G.4 Touch voltage and body current . 77 G.4.1 Equivalence between touch voltage and body current 77 Annex J (normative) Angles in lattice steel towers . 78 BS EN 50341-2-4:2016EN 50341-2-4:2016 4/90 Germany Page 6.4.3 Basic design of earthing systems with regard