BS-EN-50445-2008.pdf
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1、BRITISH STANDARD BS EN 50445:2008 Product family standard to demonstrate compliance of equipment for resistance welding, arc welding and allied processes with the basic restrictions related to human exposure to electromagnetic fields (0 Hz 300 GHz) ICS 13.280; 17.220.01; 25.160.10 ? Copyright Britis
2、h Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:03:40 MDTNo reproduction or networking permitted without license from IHS -,-,- BS EN 50445:2008 This British Standard was published under the authority of t
3、he Standards Policy and Strategy Committee on 31 March 2008 BSI 2008 ISBN 978 0 580 54906 9 National foreword This British Standard is the UK implementation of EN 50445:2008. The UK participation in its preparation was entrusted to Technical Committee WEE/6, Electric arc welding equipment. A list of
4、 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. Compliance with a British Standard cannot confer immunity from legal o
5、bligations. Amendments/corrigenda issued since publication DateComments Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:03:40 MDTNo reproduction or networking permitted without license from
6、 IHS -,-,- EUROPEAN STANDARD EN 50445 NORME EUROPENNE EUROPISCHE NORM February 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Bruss
7、els 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50445:2008 E ICS 17.220.01; 25.160.10 English version Product family standard to demonstrate compliance of equipment for resistance welding, arc welding and allied processes
8、 with the basic restrictions related to human exposure to electromagnetic fields (0 Hz - 300 GHz) Norme de famille de produit pour dmontrer la conformit dun quipement pour le soudage par rsistance, le soudage larc et les techniques connexes avec les restrictions de base concernant lexposition des pe
9、rsonnes aux champs lectromagntiques (0 Hz - 300 GHz) Produktfamiliennorm zur Konformittsprfung von Einrichtungen zum Widerstandsschweien, Lichtbogenschweien und artverwandten Prozessen in Bezug auf die bei der Exposition durch elektromagnetische Felder anzuwendenden Basisgrenzwerte (0 Hz - 300 GHz)
10、This European Standard was approved by CENELEC on 2008-02-01. 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
11、references concerning such national standards may be obtained on application to 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 CENE
12、LEC member into its own language and notified to the Central Secretariat has the 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,
13、Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, 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
14、 Co/5910770001 Not for Resale, 08/14/2008 21:03:40 MDTNo reproduction or networking permitted without license from IHS -,-,- EN 50445:2008 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 26A, Electric arc welding equipment. The text of the draft was submitted to
15、the formal vote and was approved by CENELEC as EN 50445 on 2008-02-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by p ublication of an identical national standard or by endorsement (dop) 2009-02-01 latest date by which the national standards
16、conflicting with the EN have to be withdrawn (dow) 2011-02-01 This European Standard is to be read in conjunction with EN 50444 and EN 50505. The latter was prepared by the Technical Committee CENELEC TC 26B, Electric resistance welding. This European Standard has been prepared under mandates M/305
17、and M/351 given to CENELEC by the European Commission and the European Free Trade Association. _ Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:03:40 MDTNo reproduction or networking permi
18、tted without license from IHS -,-,- 3 EN 50445:2008 Contents 1 Scope .4 2 Normative references.4 3 Terms and definitions 5 4 Compliance criteria and exposure limits .6 4.1 Background.6 4.2 Equipment for use by the general public.7 4.3 Equipment for occupational use7 4.4 Equipment for occupational us
19、e in a public area7 4.5 Exposure of persons wearing cardiac pacemakers or other medical implants.7 4.6 Projectile risk.7 4.7 Touch currents 8 5 Compliance assessment8 5.1 General8 5.1.1 Measurement and calculation.8 5.1.2 Time averaging.8 5.1.3 Spatial averaging8 5.1.4 Assessment of equipment with p
20、ulsed or non-sinusoidal welding current.9 5.1.5 Assessment of equipment with multiple welding current waveforms .9 5.2 Assessment of EMF9 5.2.1 General considerations.9 5.2.2 Electric field.10 5.2.3 Magnetic field measurements to show compliance with reference levels10 5.2.4 Calculations to show com
21、pliance with reference levels10 5.2.5 Calculations to show compliance with basic restrictions10 6 Information to be supplied with the apparatus10 7 Marking11 8 Uncertainty of assessment11 8.1 Using uncertainty for comparison with limits.11 8.2 Permissible expanded uncertainties .12 Annex A (informat
22、ive) General public basic restrictions and reference levels13 Annex B (informative) Occupational basic restrictions and reference levels15 Annex C (informative) Example for general EMF information17 Bibliography18 Tables Table 1 Summation parameters9 Table 2 Permissible expanded uncertainties.12 Tab
23、le A.1 General public basic restrictions for electric, magnetic and electromagnetic fields .13 Table A.2 General public reference levels for electric, magnetic and electromagnetic fields.14 Table B.1 Occupational basic restrictions for electric, magnetic and electromagnetic fields15 Table B.2 Occupa
24、tional reference levels for time varying electric and magnetic fields16 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 21:03:40 MDTNo reproduction or networking permitted without license from
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