BS EN 50647-2017 Basic standard for the evaluation of workers exposure to electric and magnetic fields from equipment and installations for the production transmission and distribu.pdf

1、Basic standard for the evaluation of workers exposure to electric and magnetic fields from equipment and installations for the production, transmission and distribution of electricityBS EN 50647:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06EUROPEAN STANDARD NO

2、RME EUROPENNE EUROPISCHE NORM EN 50647 June 2017 ICS 17.220.20; 17.240 English Version Basic standard for the evaluation of workers exposure to electric and magnetic fields from equipment and installations for the production, transmission and distribution of electricity Norme fondamentale pour lvalu

3、ation de lexposition des travailleurs aux champs lectriques et magntiques produitspar les quipements et installations de production, transport et distribution dlectricit Basisnorm fr die Evaluierung der beruflichen Exposition gegenber elektrischen und magnetischen Feldern ausgehend von Komponenten u

4、nd Anlagen zur Erzeugung, bertragung und Verteilung elektrischer Energie This European Standard was approved by CENELEC on 2017-04-10. 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 nation

5、al 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 (English, French, German). A ve

6、rsion 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 committees of Austria, Belgium, Bulgari

7、a, 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, Sw

8、itzerland, 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 2017 CENELEC All rights of exploitation

9、in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50647:2017 ENational forewordThis British Standard is the UK implementation of EN 50647:2017.The UK participation in its preparation was entrusted to Technical Committee GEL/106, Human exposure to low frequency and high

10、 frequency electromagnetic radiation.A list of organizations 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 are responsible for its correct application. The British Standards Ins

11、titution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 93202 1ICS 17.220.20; 17.240Compliance 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 31 July 2017.Amen

12、dments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 50647:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50647 June 2017 ICS 17.220.20; 17.240 English Version Basic standard for the evaluation of workers exposure to electric and magnetic fields from equipment

13、and installations for the production, transmission and distribution of electricity Norme fondamentale pour lvaluation de lexposition des travailleurs aux champs lectriques et magntiques produitspar les quipements et installations de production, transport et distribution dlectricit Basisnorm fr die E

14、valuierung der beruflichen Exposition gegenber elektrischen und magnetischen Feldern ausgehend von Komponenten und Anlagen zur Erzeugung, bertragung und Verteilung elektrischer Energie This European Standard was approved by CENELEC on 2017-04-10. CENELEC members are bound to comply with the CEN/CENE

15、LEC 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 obtained on application to the CEN-CENELEC Management Centre or

16、 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 to the CEN-CENELEC Management Centre has the same status as

17、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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe

18、mbourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische N

19、ormung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50647:2017 EBS EN 50647:2017EN 50647:2017 (E) 2 Contents Page European foreword 4 3.1 Terms and definitions

20、 6 3.2 Physical quantities and units 8 3.3 Abbreviations 8 6.1 General . 11 6.2 Exposure assessment regarding external fields . 11 6.2.1 General . 11 6.2.2 Harmonics of magnetic field 12 6.2.3 Harmonics of electric field . 12 6.3 Numerical calculation of induced electric fields inside the human body

21、 . 13 8.1 General . 13 8.2 Simplified criteria for compliance with action levels 15 8.2.1 General . 15 8.2.2 Magnetic fields 15 8.2.3 Electric fields 16 8.3 Assessment using measurements or calculations . 17 8.3.1 General . 17 8.3.2 Magnetic fields 17 8.3.3 Electric fields 18 9.1 General . 19 9.2 Si

22、mplified criteria for compliance with exposure limit values . 19 9.2.1 General . 19 9.2.2 Magnetic fields 20 9.2.3 Electric fields 21 9.3 Assessment using dosimetry and considerations for non-uniform fields . 21 13.1 Workers at particular risk 23 13.2 Other requirements 23 Annex A (informative) Asse

23、ssment of harmonics in magnetic fields . 24 A.1 Introduction . 24 A.2 Assessment Method using TEI . 24 A.3 Assessment using the weighted peak function 26 A.4 Simplified assessment procedure for public grids . 28 Annex B (normative) 50 Hz magnetic field sources in the environment of equipment and ins

24、tallations for production, transmission and distribution of electricity 29 B.1 General . 29 B.2 Currents in single conductors 29 B.3 Currents in circuits . 31 B.4 Assessing magnetic fields exposures . 31 B.5 Check list for assessing compliance for magnetic fields 33 Annex C (informative) Examples of

25、 application of the different assessment criteria . 34 BS EN 50647:2017EN 50647:2017 (E) 3 C.1 Assessment for air-cored reactors: Simplified calculation of the magnetic field under a vertical air-cored self-inductance 34 C.2 Assessment for insulated cables: Calculation of compliance distances for ty

26、pical XLPE cables 36 C.3 Assessment for exposure to electric fields considering different coupling conditions . 38 Annex D (informative) Method for deriving Exposure-Limit-Equivalent-Fields (LEFs) . 41 D.1 Introduction 41 D.2 Method 41 D.3 Selection of the reference model: 42 D.4 Reference organs an

27、d data 42 D.5 Uncertainty assessment . 43 D.6 Deriving the Exposure-Limit-Equivalent-Field (LEF) . 44 Annex E (informative) Considerations about DC magnetic fields in electrical companies . 45 E.1 Introduction 45 E.2 Exposure of workers to DC magnetic field in electrical companies 45 E.3 Attention p

28、oints . 45 Annex F (informative) contact currents 46 F.1 Introduction 46 F.2 Influence of electric fields 46 F.2.1 General . 46 F.2.2 Person isolated (at floating potential), capacitive coupling to ground . 46 F.2.3 Person at earth potential, isolated object . 47 F.2.4 Spark discharges . 48 F.3 Infl

29、uence of magnetic fields . 48 F.3.1 General . 48 F.3.2 Working adjacent to live circuits . 48 F.4 Summary 49 Annex G (informative) Exposure during transient and fault conditions . 50 G.1 Introduction 50 G.2 Faults 50 G.2.1 Overview . 50 G.2.2 Short-circuit currents during faults . 50 G.2.3 Preventio

30、n and protection against faults 50 G.2.4 Magnetic field exposures during faults. 51 G.3 Switching transients . 51 G.4 Lightning strikes 51 G.5 Inrush currents 51 G.6 Compliance of short-duration events with the Directive. 52 Bibliography 53 BS EN 50647:2017EN 50647:2017 (E) 4 European foreword This

31、document EN 50647:2017 has been prepared by CLC/TC 106X “Electromagnetic fields in the human environment”. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2018-04-10 lat

32、est date by which the national standards conflicting with this document have to be withdrawn (dow) 2020-04-10 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such pa

33、tent rights. This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association. BS EN 50647:2017EN 50647:2017 (E) 5 1 Scope This European Standard provides a general procedure to assess workers exposure to electric and magnetic fields

34、 (EMF) in work places associated with the production, transmission and distribution of electric energy, and to demonstrate compliance with exposure limit values and action levels as stated in the Council and European Parliament “EMF” Directive 2013/35/EU 11. NOTE 1 The Council and European Parliamen

35、t Directive 2013/35/EU will be transposed into national legislation in all the EU member countries. It is important that users of this standard consult the national legislation related to this transposition in order to identify the national regulations and requirements. These national regulations an

36、d requirements may have additional requirements that are not covered by this standard It has the role of a specific workplace standard. It takes into account the non-binding application guide for implementing the EMF Directive 10 and it defines the assessment procedures and compliance criteria appli

37、cable to the electric industry. The frequency range of this standard covers from DC to 20 kHz, which is sufficient to include the power frequency used for electric power supply systems throughout Europe (50 Hz) and the various harmonics and inter-harmonics occurring in the supply system. In this ext

38、remely low frequency range, electric and magnetic fields are independent and, therefore, they both have to be addressed in the exposure assessment. NOTE 2 Electrical companies also use radio frequency transmissions to operate and maintain their networks and power plants. Similarly, other exposures t

39、o EMF may occur during maintenance operations, for instance, due to the use of hand-held electrical tools. All these EMF sources are outside the scope of this standard. NOTE 3 Regarding EMF in the low frequency range, the scientific basis of the EMF directive is the ICNIRP health guidelines publishe

40、d in 2010 13. Reference is made to this scientific basis when necessary for justifying or clarifying some of the technical statements of the present document. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for it

41、s application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 61786-1, Measurement of DC magnetic, AC magnetic and AC electric fields from 1 Hz to 100 kHz with regard to exposure of hu

42、man beings - Part 1: Requirements for measuring instruments (IEC 61786-1) EN 50527-1, Procedure for the assessment of the exposure to electromagnetic fields of workers bearing active implantable medical devices - Part 1: General EN 50527-2-1, Procedure for the assessment of the exposure to electroma

43、gnetic fields of workers bearing active implantable medical devices - Part 2-1: Specific assessment for workers with cardiac pacemakers IEC 61786-2, Measurement of DC magnetic, AC magnetic and AC electric fields from 1 Hz to 100 kHz with regard to exposure of human beings - Part 2: Basic standard fo

44、r measurements BS EN 50647:2017EN 50647:2017 (E) 6 3 Terms, definitions, physical quantities, units and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 action level AL operational level established for the purpose of simplif

45、ying the process of demonstrating compliance with the relevant exposure limit value or, where appropriate, to take relevant protection or prevention measures Note 1 to entry: “Reference levels” as defined in the European Recommendation 1999/519/EC 3 for limiting the exposure of the public and in ICN

46、IRP Health Guidelines 13 are based on the same approach as Action Levels and the two terms are defined to achieve the same objective. Note 2 to entry: For electric fields, “Low ALs” and “High ALs” are levels which relate to the specific protection or prevention measures specified in the EMF Directiv

47、e 11. Note 3 to entry: The Low AL for external electric field is based both on limiting the internal electric field below ELVs and on limiting spark discharges in the working environment. Below the High AL, the internal electric field does not exceed ELVs and annoying spark discharges are prevented,

48、 provided that the relevant protection measures are taken. Note 4 to entry: For magnetic fields, “Low ALs” are levels which relate to the sensory effects ELVs and “High ALs” to the health effects ELVs. Note 5 to entry: Compliance with the ALs will ensure compliance with the relevant ELVs. If the ass

49、essed exposure values are higher than the ALs, it does not necessarily follow that the ELVs have been exceeded, but a more detailed analysis is necessary to demonstrate compliance with the ELVs. Note 6 to entry: ALs may not provide adequate protection to workers at particular risks, for whom a particular risk assessment shall be performed. 3.1.2 compliance distance distance from a source of field that ensures respect of the relevant exposure limit values or action levels Note 1 to entry: Working at distances smaller than complian