1、BSI Standards PublicationOverhead electrical lines exceeding AC 1 kVPart 2-19: National Normative Aspects (NNA)for CZECH REPUBLICBS EN 50341-2-19:2015National forewordThis British Standard is the UK implementation of EN 50341-2-19:2015. This standard, together with the following list of National Nor
2、mative Aspect standards, supersedes BS EN 50423-3:2005 and BS EN 50341-3:2001:BS EN 50423-3:2005 and BS EN 50341-3:2001 will be withdrawn upon publication of the rest ofthe series.The UK participation in its preparation was entrusted to Technical Committee PEL/11, OverheadLines.A list of organizatio
3、ns represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users areresponsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 9
4、78 0 580 90341 0ICS 29.240.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH
5、 STANDARDBS EN 50341-2-19:2015Country Code Origin Ref AT Austrian National Committee BS EN 50341-2-1 BE Belgian National Committee BS EN 50341-2-2 CH Swiss National Committee BS EN 50341-2-3 DE German National Committee BS EN 50341-2-4DK Danish National Committee BS EN 50341-2-5 ES Spanish National
6、Committee BS EN 50341-2-6 FI Finnish National Committee BS EN 50341-2-7 FR French National Committee BS EN 50341-2-8 GB British National Committee BS EN 50341-2-9GR Greek National Committee BS EN 50341-2-10 IE Irish National Committee BS EN 50341-2-11 IS Iceland National Committee BS EN 50341-2-12 I
7、T Italian 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 PT Portuguese National Committee BS EN 50341-2-17 SE Swedish National Committee BS EN 50341-2-18 CZ Czech
8、National Committee BS EN 50341-2-19:2015EE Estonian National Committee BS EN 50341-2-20:2015 SI Slovak National Committee BS EN 50341-2-21 PL Polish National Committee BS EN 50341-2-22 Compliance with a British Standard cannot confer immunity from legal obligations.EUROPEAN STANDARD NORME EUROPENNE
9、EUROPISCHE NORM EN 50341-2-19 April 2015 ICS 29.240.20 English Version Overhead electrical lines exceeding AC 1 kV - Part 2-19: National Normative Aspects (NNA) for CZECH REPUBLIC (based on EN 50341-1:2012) This European Standard was approved by CENELEC on 2015-04-07. CENELEC members are the nationa
10、l 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, Portug
11、al, 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-1000
12、 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50341-2-19:2015 E BS EN 50341-2-19:2015EN 50341-2-19:2015 - 2/63 - Czech Republic Contents Page 1 Scope 7 1.1 General . 7 1.2 Field of application 7 2 Normative referenc
13、es, definitions and symbols 7 2.1 Normative references . 7 2.2 Definitions . 10 2.3 Symbols 10 3 Basis of design 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
14、velocity 13 4.3.2 Mean wind velocity . 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
15、4.6 Combined wind and ice loads . 16 4.6.1 Combined probabilities . 16 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.
16、8.2 Torsional loads 18 4.8.3 Longitudinal 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 20 4.11.1 Avalanches, creeping snow 20 4.11.2 Earthquakes 2
17、0 4.12 Load cases 20 4.12.1 General . 20 4.12.2 Standard load cases . 20 4.13 Partial factors for actions 22 5 Electrical requirements 25 5.3 Insulation coordination 25 5.4 Classification of voltages and overvoltages 25 5.4.2 Representative power frequency voltages . 25 5.5 Minimum air clearance dis
18、tances to avoid flashover 26 BS EN 50341-2-19:2015Czech Republic - 3/63 - EN 50341-2-19:2015 5.5.2 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
19、 5.6.3 Wind loads for determination of electric clearances . 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 30 5.8 Internal clearances within the span and at the top of support 30 5
20、.9 External clearances 33 5.9.1 General . 33 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 . 34 5.9.4 External clearances to crossing traffic routes . 36 5.9.5 External clearances to adjacent traffic
21、routes 38 5.9.6 External clearances to other power lines or overhead telecommunication lines . 38 5.10 Corona effect 40 5.10.1 Radio noise . 40 5.11 Electric and magnetic fields 40 5.11.1 Electric and magnetic fields under a line 40 5.11.2 Electric and magnetic field induction 40 5.11.3 Interference
22、 with telecommunication circuits 40 6 Earthing systems . 41 6.1 Introduction . 41 6.1.2 Requirements for dimensioning of earthing systems . 41 6.1.3 Earthing measures against lightning effects . 41 6.1.4 Transferred potentials . 42 6.2 Ratings with regard to corrosion and mechanical strength 43 6.2.
23、1 Earth electrodes 43 6.2.2 Earthing and bonding conductors . 43 6.4 Dimensioning with regard to human safety 43 6.4.1 Permissible values for touch voltages 43 6.4.3 Basic design of earthing systems with regard to permissible touch voltage 43 7 Supports 44 7.3 Lattice steel towers . 44 7.3.6 Ultimat
24、e limit states. 44 7.3.7 Serviceability limit states 44 7.3.8 Resistance of connections 44 7.3.9 Design assisted by testing 44 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 connec
25、tions 45 7.4.9 Design assisted by testing 45 7.5 Wood poles . 45 7.5.5 Ultimate limit states. 45 7.5.6 Serviceability limit states 45 7.5.7 Resistance of connections 45 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 46 BS
26、 EN 50341-2-19:2015EN 50341-2-19:2015 - 4/63 - Czech Republic 7.6.6 Design assisted by testing 46 7.7 Guyed structures 46 7.7.4 Ultimate limit states . 46 7.7.5 Serviceability limit states . 47 7.9 Corrosion protection and finishes . 47 7.9.1 General . 47 7.10 Maintenance facilities . 47 7.10.1 Clim
27、bing 47 7.10.2 Maintainability . 47 7.10.3 Safety requirements 47 8 Foundations . 47 8.1 Introduction . 47 8.2 Basis of geotechnical design (EN 1997-1:2004 Section 2) . 47 8.2.2 Geotechnical design by calculation 47 8.3 Soil investigation and geotechnical data (EN 1997-1:2004 Section 3) . 47 9 Condu
28、ctors and earth-wires 48 9.1 Introduction . 48 9.2 Aluminium based conductors 48 9.2.2 Electrical requirements . 48 9.2.3 Conductor service temperatures and grease characteristics . 49 9.2.4 Mechanical requirements 49 9.2.5 Corrosion protection . 49 9.2.6 Test requirements . 49 9.3 Steel based condu
29、ctors 50 9.3.1 Characteristics and dimensions 50 9.3.3 Conductor service temperatures and grease characteristics . 50 9.3.4 Mechanical requirements 50 9.3.5 Corrosion protection . 51 9.3.6 Test requirements . 51 9.4 Copper base conductors . 51 9.5 Conductors and ground wires containing optical fibre
30、 telecommunication circuits 51 9.5.1 Characteristics and dimensions 51 9.5.2 Electrical requirements . 51 9.5.3 Conductor service temperatures. 51 9.5.4 Mechanical requirements 51 9.6 General requirements . 52 9.6.2 Partial factor for conductors 52 9.6.3 Minimum cross-sections . 52 9.6.4 Sag tension
31、 calculations 52 10 Insulators . 52 10.1 Introduction . 52 10.4 Pollution performance requirements . 52 10.5 Power arc requirements 53 10.7 Mechanical requirements 53 10.10 Characteristics and dimensions of insulators . 53 10.11 Type test requirements . 54 10.11.1 Standard type tests . 54 10.11.2 Op
32、tional type tests 54 11 Hardware . 54 11.1 Introduction . 54 11.6 Mechanical requirements 54 12 Quality assurance, checks and taking-over 55 BS EN 50341-2-19:2015Czech Republic - 5/63 - EN 50341-2-19:2015 Annex H/CZ (informative) . 55 Installation and measurements of earthing systems 55 H.2 Basis fo
33、r the verification . 55 H.2.2 Resistance to earth . 55 H.3 Installation of earth electrodes and earthing conductors 55 H.3.1 Installation of earth conductors . 55 H.4 Measurements for and on earthing systems 55 H.4.4 Determination of the earth potential rise 55 H.4.5 Reduction factor related to eart
34、h wires of overhead lines 56 Annex M/CZ (informative) . 56 Geotechnical and structural design of foundations 56 M.1 Typical values of the geotechnical parameters of soils and rocks . 56 M.1.3 Symbols, definitions and units of some ground parameters 56 M.3 Sample semi-empirical models for resistance
35、estimation 62 M.3.1 Geotechnical design by calculation 62 Annex S/CZ (informative) . 63 Map of icing zones in the Czech Republic . 63 BS EN 50341-2-19:2015EN 50341-2-19:2015 - 6/63 - Czech Republic Foreword 1. The Czech National Committee (NC) is identified by the following address : CZECH OFFICE FO
36、R STANDARDS, METROLOGY AND TESTING email: unmzunmz.cz Gorazdova 24, P.O.Box 49 tel: +420 224 907 111 128 01 PRAHA 2 fax: +420 221 802 301 Czech Republic 2. The Czech National Committee has prepared this Part 219 (EN 50341-2-19) listing the Czech National Normative Aspects (NNA) under its sole respon
37、sibility and duly passed this document through the CENELEC and CLC/TC11 procedures. NOTE The Czech National Committee also takes sole responsibility for the technically correct co-ordination of this EN 50341-2-19 with EN 50341-1. It has performed the necessary checks in the frame of quality assuranc
38、e/control. However, it is noted that this quality assurance/control has been made in the framework of the general responsibility of The Czech National Committee under the national laws/regulations. 3. This EN 50341-2-19 is normative in the Czech Republic and informative for other countries. 4. This
39、EN 50341-2-19 has to be read in conjunction with EN 50341-1, hereinafter referred as Part 1. All clause numbers used in Part 219 correspond to those of Part 1. Specific subclauses which are prefixed CZ are to be read as amendments to the relevant text in Part 1. Any necessary clarification regarding
40、 the application of Part 219 in conjunction with Part 1 shall be referred to the Czech Office for Standards, Metrology and Testing that will, in co-operation with CLC/TC11, clarify the requirements. When no reference is made in Part 219 to a specific subclause, then Part 1 applies. 5. In the case of
41、 “boxed values“ defined in Part 1, amended values (if any) which are defined in Part 219 shall be taken into account in the Czech Republic. However, any “boxed values” whether in Part 1 or Part 2-19, shall not be amended in direction of greater risk in the Project Specification. 6. The national Czec
42、h standards/regulations, regarding overhead lines exceeding 1 kV AC, are listed in 2.1/CZ.2 and 2.1/CZ.3. NOTE All national standards referred to in this Part 219 will be replaced by the relevant European Standards as soon as they become available and are declared by the Czech Office for Standards,
43、Metrology and Testing to be applicable and thus reported to the secretary of CLC/TC11.BS EN 50341-2-19:2015Czech Republic - 7/63 - EN 50341-2-19:2015 1 Scope 1.1 General (ncpt) CZ.1 New overhead line The new overhead line is considered a brand new electric overhead line with nominal voltage exceedin
44、g 1 kV AC, between the points A and B. The new branch line of the existing overhead line shall be considered a new overhead line except for a junction support for which the specific requirements shall be defined in the Project Specification. The extent of application of this standard in respect of r
45、econstruction, relaying and extension of existing overhead lines shall be determined in the Project Specification. Simultaneously, the Project Specification shall determine, which of the previous national standards shall be used and to what extent they shall be used for the project in question. 1.2
46、Field of application (ncpt) CZ.1 Field of application The requirements of this standard shall be adopted, where applicable (e.g. requirements on loads, external clearances, etc.), for telecommunication cables as well. In case of overhead line under the design stage, parties concerned shall agree the
47、 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) CZ.2 Installation of telecommunicati
48、on equipment on supports Provisions of this standard also apply to the telecommunication equipment and devices (aerials, dish antennas, etc.) which are installed on individual supports of overhead power lines, especially in terms of wind and ice loads on such installed equipment. Design and installa
49、tion has to respect requirements of the utility operating the line in question. The design of such telecommunication equipment has to incorporate such technical solutions and such precautions, which shall allow safe access and maintenance of both a power line and telecommunication equipment, and which shall provide protection of persons performing repairs or maintenance of the power line and/or telecommunication equipment against electric shock and protection of telecommunication equipment and attached installations against the influence of the power
