BS-EN-50505-2008.pdf
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1、BRITISH STANDARD BS EN 50505:2008 Basic standard for the evaluation of human exposure to electromagnetic fields from equipment for resistance welding and allied processes ICS 13.280; 25.160.30 ? Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licens
2、ee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:04:14 MDTNo reproduction or networking permitted without license from IHS -,-,- BS EN 50505:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2008 BSI 2008 ISBN 978 0 580 57717
3、8 National foreword This British Standard is the UK implementation of EN 50505:2008. The UK participation in its preparation was entrusted to Technical Committee WEE/29, Resistance welding. A list of organizations represented on this committee can be obtained on request to its secretary. This public
4、ation does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComments Copyright British Standards I
5、nstitution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:04:14 MDTNo reproduction or networking permitted without license from IHS -,-,- EUROPEAN STANDARD EN 50505 NORME EUROPENNE EUROPISCHE NORM April 2008 CENELEC European Com
6、mittee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELE
7、C members. Ref. No. EN 50505:2008 E ICS 25.160.30 English version Basic standard for the evaluation of human exposure to electromagnetic fields from equipment for resistance welding and allied processes Norme de base destine lvaluation de lexposition humaine aux champs lectromagntiques manant du mat
8、riel de soudage par rsistance et des techniques connexes Grundnorm fr die Bewertung der menschlichen Exposition gegenber elektromagnetischen Feldern von Einrichtungen zum Widerstands- schweien und fr verwandte Verfahren This European Standard was approved by CENELEC on 2008-03-01. CENELEC members ar
9、e 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 obtained on application to
10、the Central Secretariat 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 to the Central Secretariat has the
11、 same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands,
12、Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:04:14 MDTNo reproduction or network
13、ing permitted without license from IHS -,-,- EN 50505:2008 - 2 - Foreword This European Standard was prepared by the Technical Committee CENELEC TC 26B, Electric resistance welding. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50505 on 2008-03-01. The foll
14、owing dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-03-01 This European Stan
15、dard shall be read in conjunction with EN 50445. This European Standard has been prepared under mandates M/305 and M/351 given to CENELEC by the European Commission and the European Free Trade Association. _ BS EN 50505:2008 Copyright British Standards Institution Provided by IHS under license with
16、BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:04:14 MDTNo reproduction or networking permitted without license from IHS -,-,- - 3 - EN 50505:2008 Contents 1 Scope . 5 2 Normative references . 6 3 Definitions . 6 3.1 General . 6 3.2 Specific for resistance weldin
17、g and similar applications 8 4 Physical quantities, units and constants .10 4.1 Quantities and units 10 4.2 Constants10 5 Assessment procedures 10 5.1 General .10 5.2 Resistance welding equipment EMF emission description 10 5.3 Assessment conditions .11 5.4 Averaging11 5.5 Pulsed or non-sinusoidal w
18、elding current .12 5.6 Conductivity of living tissue 18 5.7 Frequency range limitations .18 5.8 Application of assessment procedures .19 5.9 Measurements 21 5.10 Analytical calculations 23 5.11 Numerical calculations 28 6 Uncertainty of assessment 30 6.1 Including uncertainty .30 6.2 Evaluation of u
19、ncertainties .31 6.3 Reasonable overall uncertainties .31 6.4 Examples of typical uncertainties .32 7 Assessment report .32 7.1 General principles .32 7.2 Items to be recorded in the assessment report 33 Annex A (normative) Assessment parameters 34 Annex B (informative) Examples for exposure assessm
20、ent 46 Annex C (informative) Numerical simulation using anatomical body models .59 Annex D (normative) Determination of coupling factor 63 Annex E (informative) Summation weighting and transfer function examples 65 Annex F (informative) Example for an uncertainty budget .70 Bibliography 71 Figures F
21、igure 1 Example for parameters of a welding current sequence . 12 Figure 2 Average electrical conductivities for homogeneous body modelling from 10 Hz to 10 MHz 18 Figure 3 Double parallel conductor model 25 Figure 4 Rectangular conductor model 26 Figure A.1 Points of investigation for stationary we
22、lding equipment 35 Figure A.2 Point of investigation for portable hand-held welding equipment . 36 BS EN 50505:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:04:14 MDTNo reproduction
23、or networking permitted without license from IHS -,-,- EN 50505:2008 - 4 - Figure A.3 Point of investigation for suspended welding equipment . 37 Figure A.4 Point of investigation for a single side welding tool 38 Figure A.5 Point of investigation for a double side welding tool . 38 Figure A.6 Simul
24、ation geometry for stationary equipment . 40 Figure A.7 Simulation geometry A 41 Figure A.8 Simulation geometry B 42 Figure A.9 Simulation geometry C . 43 Figure A.10 Simulation geometry for single side welding tool equipment 44 Figure A.11 3D models dimensions for spheroid and cylindrical models .
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