1、BRITISH STANDARDBS EN 62233:2008Incorporating corrigendum August 2008Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposureICS 17.220.20; 97.030g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g4
2、4g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 62233:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 May 2008 BSI 2008ISBN 978 0 580 64256 2National forewordThis Br
3、itish Standard is the UK implementation of EN 62233:2008, IEC 62233:2005. It supersedes BS EN 50366:2003, which will be withdrawn on 1 December 2012.The CENELEC common modifications have been implemented at the appropriate places in the text. The start and finish of each common modification is indic
4、ated in the text by tags .The UK participation in its preparation was entrusted to Technical Committee CPL/61, Safety of household and similar electrical appliances.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to
5、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 publicationDate CommentsImplementation of CENELEC corrigendum August 2008. Correct
6、ion of dow date in the CENELEC foreword31 December 2008incorporating corrigendum August 2008. It is derived by from EUROPEAN STANDARD EN 62233 NORME EUROPENNE EUROPISCHE NORM April 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Eu
7、ropisches 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 CENELEC members. Ref. No. EN 62233:2008 E ICS 97.030 Supersedes EN 50366:2003 + A1:2006English versi
8、on Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure (IEC 62233:2005, modified) Mthodes de mesures des champs lectromagntiques des appareils lectrodomestiques et similaires en relation avec lexposition humaine (CEI 62233:2005,
9、modifie) Verfahren zur Messung der elektromagnetischen Felder von Haushaltgerten und hnlichen Elektrogerten im Hinblick auf die Sicherheit von Personen in elektromagnetischen Feldern (IEC 62233:2005, modifiziert) This European Standard was approved by CENELEC on 2007-12-01. CENELEC members are bound
10、 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 the Cen
11、tral 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 same s
12、tatus 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, Norway,
13、 Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Incorporating corrigendum August 2008Foreword The text of the International Standard IEC 62233:2005, prepared by IEC TC 106, Methods for the assessment of electric, magnetic and electromagnetic fields
14、associated with human exposure, together with common modifications prepared by a Joint Editing Group of the Technical Committee CENELEC TC 61, Safety of household and similar electrical appliances, and CENELEC TC 106X, Electromagnetic fields in the human environment, was submitted to the Unique Acce
15、ptance Procedure and was approved by CENELEC as EN 62233 on 2007-12-01. This European Standard supersedes EN 50366:2003 + A1:2006, to which it is technically equivalent. The following dates are applicable: - latest date by which the EN has to be implemented at national level by publication of an ide
16、ntical national standard or by endorsement (dop) 2008-12-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) Annex ZA has been added by CENELEC. _ 2 BS EN 62233:2008Endorsement notice The text of the International Standard IEC 62233:2005 was approved b
17、y CENELEC as a European Standard with agreed common modifications. 2012-12-01 CONTENTS INTRODUCTION.5 1 Scope.6 2 Normative references .7 3 Terms and definitions .7 3.1 Physical quantities and units .7 3.2 Terms and definitions 7 4 Choice of test method .8 5 Measuring methods 8 5.1 Electric fields.8
18、 5.2 Frequency range .8 5.3 Measuring distances, positions and operating mode9 5.4 Magnetic field sensor 9 5.5 Measuring procedures for magnetic fields .9 5.6 Measurement uncertainty 13 5.7 Test report 13 6 Evaluation of results.13 Annex A (normative) Test conditions for the measurement of magnetic
19、flux density .17 Annex B (informative) Exposure limits25 Annex C (normative) Determination of coupling factors27 Annex D (informative) Examples using the limits of Annex B.32 Bibliography39 Figure 1 Recommendations for the choice of the test method starting with the evaluation against the reference
20、levels .14 Figure 2 Example for dependency on frequency of the reference levels with smoothed edges .15 Figure 3 Example for a transfer function A corresponding to the reference level of Figure 2 15 Figure 4 Schematic diagram of the reference method 16 Figure A.1 Measuring position: top / front (see
21、 3.2.7).22 Figure A.2 Measuring position: around (see 3.2.7) .22 Figure A.3 Measuring distances for induction hobs and hotplates 24 Figure C.1 Hot spot27 Figure C.2 Gradient of flux density and integral G28 Figure C.3 Equivalent coil position.28 Figure C.4 Gradients of flux density and coil29 Annex
22、ZA (normative) Normative references to international publications with their corresponding European publications .42 3 BS EN 62233:2008Figure C.5 Coupling factor aC(r) with 0.1 S/m, Asensor=100 cm2, for the whole human body ( re-scaled using ICNIRP limits) 31 Figure D.1 Measurement of the magnetic f
23、lux 33 Figure D.2 Normalized field distribution along the tangential distance r034 Figure D.3 Numerical model of a homogenous human body.35 Figure D.4 Details of the construction of the head and shoulders .36 Figure D.5 Position of source Q against model K .37 Table A.1 Measuring distances, sensor l
24、ocations, operating conditions and coupling Table B.1 Basic restrictions for electric, magnetic and electromagnetic fields (0 Hz to 300 GHz) .25 Table B.2 Reference levels for electric, magnetic and electromagnetic fields (0 Hz to 300 GHz, unperturbed r.m.s. values 25 Table B.3 Basic limitations for
25、 general public exposure applying to various regions of the body up to 3 kHz Excerpts 26 Table B.4 Magnetic field limits for general public exposure: exposure of head and torso Excerpts. 26 Table C.1 Value G m of different coils29 Table C.2 Value of factor kTmA2/at 50 Hz for the whole human body30 T
26、able D.1 Transfer function with ICNIRP general public exposure32 Table D.2 Transfer function with IEEE general public exposure32 Table D.3 - Coupling factor ac(r1) .33 4 BS EN 62233:2008Figure Z2 Schematic diagram of the reference method .10 Figure Z1 Transfer function 10 factors .19 INTRODUCTION Th
27、is standard establishes a suitable evaluation method for determining the electromagnetic fields in the space around the equipment mentioned in the scope, and defines standardized operating conditions and measuring distances. This document is designed as one method for measurement and assessment of e
28、lectromagnetic (EM) fields and their potential effect on the human body by reference to exposure standards. Existing exposure standards, e.g. ICNIRP98 111), IEEE C95.1-1999 22 and IEEE C95.6-2002 12, present rules for the exposure of humans to EM fields. The simplest and more practical levels limits
29、 with which to comply are limits (suitably time-averaged in some cases) on the electric (E) and magnetic (B) fields, measured in the absence of the human to be exposed to these fields. These limits are called maximum permissible exposure levels, IEEE-based levels, or reference levels (ICNIRP). Suita
30、ble definitions and specified measurement techniques are applied in any exposure compliance measurement or assessment. Compliance with maximum permissible exposure or reference levels is sufficient for positive assessment of meeting these levels as specified in the appropriate exposure standard. Thi
31、s document addresses the additional measurement and calculation techniques which permit determination of compliance under one set of specified circumstance, without reference to time of exposure or actual exposure conditions. This document is not meant to supplant definitions and procedures specifie
32、d in exposure standards but is aimed at supplementing the procedure already specified for compliance with exposure. 1)Figures in square brackets refer to the Bibliography. 5 BS EN 62233:2008MEASUREMENT METHODS FOR ELECTROMAGNETIC FIELDS OF HOUSEHOLD APPLIANCES AND SIMILAR APPARATUS WITH REGARD TO HU
33、MAN EXPOSURE 1 Scope This International Standard deals with electromagnetic fields up to 300 GHz and defines methods for evaluating the electric field strength and magnetic flux density around household and similar electrical appliances, including the conditions during testing as well as measuring d
34、istances and positions. Appliances may incorporate motors, heating elements or their combination, may contain electric or electronic circuitry, and may be powered by the mains, by batteries, or by any other electrical power source. Appliances include such equipment as household electrical appliances
35、 electric tools and electric toys. Appliances not intended for normal household use but which nevertheless may be approached by the public, or may be used by laymen, are within the scope of this standard. This standard does not apply to: apparatus designed exclusively for heavy industrial purposes;
36、 apparatus intended to be part of the fixed electrical installation of buildings (such as fuses, circuit breakers, cables and switches); radio and television receivers, audio and video equipment, and electronic music instruments; medical electrical appliances; personal computers and similar equipmen
37、t; radio transmitters; apparatus designed to be used exclusively in vehicles; The fields of multifunction equipment which is subjected simultaneously to different clauses of this standard and/or other standards shall be assessed using the provisions of each clause/standard for the relevant functions
38、 in operation. Abnormal operation of the appliances is not taken into consideration. This standard includes specific elements to assess human exposure: definition of sensor; definition of measuring methods; definition of operating mode for appliance under test; definition of measuring distance and p
39、osition. The measurement methods specified are valid from 10 Hz to 400 kHz. In the frequency range above 400 kHz and below 10 Hz appliances in the scope of this standard are deemed to comply without testing unless otherwise specified in IEC 60335 series. NOTE The methods are not suitable for compari
40、ng the fields of different appliances. 6 BS EN 62233:20082 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (incl
41、uding any amendments) applies. IEC 60335 (all parts), Safety of household and similar electrical appliances IEC 61786, Measurement of low-frequency magnetic and electric fields with regard to exposure of human beings Special requirements for instruments and guidance for measurements IEC 62311, Asses
42、sment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz 300 GHz)2)CISPR 14-1, Electromagnetic compatibility Requirements for household appliances, electric tools and similar apparatus Part 1: Emission 3 Terms and definitions For the purpos
43、e of this standard the following terms and definitions apply. Internationally accepted SI-units are used throughout the standard. 3.1 Physical quantities and units Quantity Symbol Unit Dimension Conductivity Siemens per metre S/m Current density J Ampere per square metre A/m2Electric field strength
44、E Volt per metre V/m Frequency f Hertz HzMagnetic field strength H Ampere per metre A/m Magnetic flux density B Tesla T (Wb/m2or Vs/m2) 3.2 Terms and definitions 3.2.1 basic restriction restrictions on exposure to time-varying electric, magnetic and electromagnetic fields that are based on establish
45、ed biological effects and include a safety factor. The basic restriction for the current density is JBR, the basic restriction for the internal electric field strength is EBR 2)To be published. Text deleted 7 BS EN 62233:20083.2.9 response time time required for a field-measuring instrument to reach
46、 some specified percentage of the final value after being placed in the field to be measured 3.2.10 Weighted result W final result of the measurement, taking the frequency dependent reference level into account 4 Choice of test methodFor all appliances, independent of the spectrum of the produced fi
47、elds, the procedure in 5.5.2 is applicable. This is the reference method, which has to be used in case of dispute. The procedure in 5.5.3 may be applied for appliances producing a line spectrum composed of only one fundamental line and their harmonics lines. For appliances producing significant fiel
48、ds only on the mains frequency and its harmonics, if any, one of the simplified test methods in 5.5.4 may be used. Equipment where the full working cycle is less than 1 s shall be measured according to IEC 62311 for pulsed fields; however operating conditions, measuring distances and coupling factor
49、 are given in this standard. A step by step procedure can be applied, from the easiest methods to the more complicated ones, see the flow diagram in Figure 1. 5 Measuring methods 5.1 Electric fields The measurement method is under consideration. If appliances, with their internal transformer or electronic circuit, are working at voltage lower than 1 000 V, they are deemed to comply without testing. 5.2 Frequency range The
