1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58g
2、enerated by electronic and electrical apparatus in the railway environment with respect to human exposureICS 17.240Measurement procedures of magnetic field levels BRITISH STANDARDBS EN 50500:2008BS EN 50500:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Cop
3、y, (c) BSIThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 August 2008 BSI 2008ISBN 978 0 580 56038 5Amendments/corrigenda issued since publicationDate CommentsCompliance with a British Standard cannot confer immunity from legal obligations
4、.National forewordThis British Standard is the UK implementation of EN 50500:2008. The UK participation in its preparation was entrusted to Technical Committee GEL/9, Railway electrotechnical applications.A list of organizations represented on this committee can be obtained on request to its secreta
5、ry.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.EUROPEAN STANDARD EN 50500 NORME EUROPENNE EUROPISCHE NORM July 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalis
6、ation 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 CENELEC members. Ref. No. EN 50500:2008 E ICS 17.240 English version Measur
7、ement procedures of magnetic field levels generated by electronic and electrical apparatus in the railway environment with respect to human exposure Procdures de mesure des niveaux de champ magntique gnrs par les appareils lectriques et lectroniques dans lenvironnement ferroviaire en regard de lexpo
8、sition humaine Messverfahren fr magnetische Felder, die durch elektronische und elektrische Gerte in der Bahnumgebung erzeugt werden, hinsichtlich der Exposition von Personen This European Standard was approved by CENELEC on 2008-06-01. CENELEC members are bound to comply with the CEN/CENELEC Intern
9、al 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 Central Secretariat or to any CENELEC mem
10、ber. 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 status as the official versions. CENELE
11、C 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, Poland, Portugal, Romania, Slovakia,
12、Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c) BSIEN 50500:2008 - 2 - Foreword This European Standard was prepared by the Technical Committee CENELEC TC 9X, Electrical and electronic applica
13、tions for railways. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50500 on 2008-06-01. This European Standard is to be read in conjunction with EN 50392. The following dates were fixed: latest date by which the EN has to be implemented at national level by
14、publication of an identical national standard or by endorsement (dop) 2009-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-06-01 _ BS EN 50500:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c)
15、 BSI- 3 - EN 50500:2008 Contents Introduction 4 1 Scope .4 2 Normative references 5 3 Terms and definitions .5 4 Measurement procedure .6 4.1 General 6 4.2 Rolling stock .7 4.3 Fixed installation 8 4.4 Test conditions .9 4.5 Test environment . 10 5 Measurement technique . 10 5.1 Frequency range 10 5
16、.2 Measurement equipment 11 5.3 Evaluation methods 12 5.4 Measurement execution . 13 6 Report 14 Annex A (normative) Test plan . 15 Bibliography . 18 BS EN 50500:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c) BSIEN 50500:2008 - 4 - Introduction Th
17、e intention of this European Standard is to establish a suitable measuring/calculation method for determining the magnetic fields in the space around the equipment mentioned in the scope, to standardize operating conditions and to fix measuring/calculation distances. It offers a method to demonstrat
18、e compliance with the council recommendation 1999/519/EC (see Bibliography) and Directive 2004/40/EC (see Bibliography). 1 Scope The scope of this product-family standard is limited to apparatus, systems and fixed installations which are intended for use in the railway environment. The frequency ran
19、ge covered is 0 Hz to 300 GHz. Technical considerations and measurements are necessary for frequencies up to 20 kHz because no relevant field strengths are expected above due to the physical nature of EMF-sources in the railway environment. The object of this standard is to provide measurement and c
20、alculation procedures of electric and magnetic field levels generated by electronic and electrical apparatus in the railway environment with respect to human exposure. The regulations regarding the protection of human being during exposure to non-ionizing electromagnetic fields in the railway enviro
21、nment are different within the countries of European Community. This standard offers a procedure regarding measurement, simulation and evaluation. At present two European documents regarding EMF have to be considered: a) Council Recommendation 1999/519/EC of 12 July 1999 (see Bibliography); b) Direc
22、tive 2004/40/EC (see Bibliography). The measurement procedures and points of measurement cover also the aspect of persons bearing active implantable medical devices. NOTE 1 Not covered is the risk assessment for persons bearing active implants in magnetic field generated by electronic and electrical
23、 apparatus in the railway environment. Not covered are personal electronic devices (e.g. mobile phones, notebooks, wireless communication systems etc.) of passengers and workers. Not covered are intentional transmitters with frequencies higher than 20 kHz. NOTE 2 These apparatus (with a working freq
24、uency of 9 kHz or higher) are covered by R measurement of a.c. magnetic field: tri-axial probe with three orthogonal loops, loop with 100 cm area, minimum frequency range 5 Hz to 20 kHz. NOTE For measurements in the railway environment the magnetic flux density B is the magnitude of a field vector t
25、hat is equal to the magnetic field H multiplied by the permeability 0. HB =0 5.2.2 Summation of spatial components Three measurements shall be performed at the same time in three orthogonal planes to obtain the different components of the field. The total H-field would be given by the following form
26、ula: 222zyxHHHH += For a.c. fields the summation has to be performed either in the time domain after filtering or in the frequency domain after FFT (Fast Fourier Transform) of the measured components of the field. NOTE The formula for H will give worst case values for summation in the frequency doma
27、in as the phase relation between the components is lost. More accurate methods may be used. 5.2.3 Data logging It is recommended to use a data logging equipment to make the measurement data available for further offline evaluation. 5.2.4 Dynamic range The dynamic range of the measurement chain shall
28、 cover the range from 5 % of the applicable limit to 200 % of the applicable limit as a minimum. 5.2.5 Isotropy The isotropy deviation of the complete system shall be 5 % or less. 5.2.6 Linearity The linearity of the complete system regarding measured field strength values shall be not more than 5 %
29、 in the required dynamic range. BS EN 50500:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c) BSIEN 50500:2008 - 12 - 5.2.7 Calibration and accuracy All relevant measurement equipment shall be calibrated for the used frequency range. The uncertainty
30、of the complete measurement chain from the field probes to the final display unit shall be not more than 20 %. The complete measurement chain shall be checked to verify its performance and accuracy. 5.3 Evaluation methods The methods used for the evaluation and assessment of measurement data should
31、be in line with the basic regulations. 5.3.1 DC magnetic field The evaluation of DC magnetic fields shall be done by using the formula stated in 5.2.2. 5.3.2 AC magnetic field For a.c. magnetic fields, two basic methods for data evaluation and assessment are applicable. The method defined by ICNIRP
32、guidelines (see Bibliography) is FFT (see below). This is the basic method. As the FFT overestimates magnetic fields in comparison with the results of time domain method (the railway environment is characterized by pulsed and complex non-sinusoidal waveforms) the application of the second method (as
33、 mentioned in ICNIRP statement (see Bibliography) may be more realistic in some cases. In case of exceeding the limit because of transients they should be identified. Transients with a duration of less then 1 s, e.g. during switching events, can be disregarded. 5.3.2.1 FFT Evaluation in the frequenc
34、y domain with FFT-analyser, digital signal processor or equivalent equipment (online or offline of recorded data) and followed by spectral weighting and summation of spectral components as required by particular basic requirements/standards and as necessary for conversion of the measured signals to
35、values in terms of magnetic flux density (B(f). Record length of FFT-data (i.e. observation time and bandwidth of spectral signal) and sampling frequency should be in accordance with the basic requirements/standards. Recommendations/typical parameters: Time window: hanning (no overlap) Record length
36、: 0,5 s (realtime FFT) Sampling frequency: 40 kHz Summation of spectral components: linear, spectral lines under a threshold value of 10 % of the limit value are not taken into account. NOTE Evaluation of transients and variables frequencies by FFT analysis may cause wrong results. If peak hold resu
37、lt complies with limit values, a detailed analysis of each time step is not necessary. Changes in load (e.g. change from accelerating to coasting) may cause errors in FFT analysis. Therefore a separate investigation of different operating conditions without the transition is allowed. BS EN 50500:200
38、8Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c) BSI- 13 - EN 50500:2008 5.3.2.2 Time domain Evaluation in the time domain (dB(t)/dt or B(t) with digital or analogue filters with appropriate filter characteristics in order to perform the spectral weigh
39、ting and conversion of the measured signals to values in terms of magnetic flux density (B(t), if necessary followed by evaluation as required by particular basic requirements/standards (example is given in ICNIRP statement (see Bibliography). Sampling frequency: 40 kHz NOTE The two methods will pro
40、duce identical results for sinusoidal magnetic fields (assuming that the weighting functions are the same for both methods); will produce comparable results for periodic magnetic fields; may produce different results for impulse shaped magnetic fields (for multi frequency signals the FFT method over
41、estimates the exposure). 5.4 Measurement execution Measure all 3 axis of the magnetic field with one axis in parallel to the rails. For each point of every measurement area, magnetic fields are measured in the following way: 5.4.1 Rolling stock - Inside rolling stock: Measuring all 3 axis of the mag
42、netic field in static condition for a duration of (30 60) s. Measuring all 3 axis of the magnetic field in dynamic condition from the standstill with maximum acceleration to maximum speed, coasting for a duration of at least 10 s and maximum electrical break to stop. For each measuring point and eac
43、h condition one measurement is sufficient. - Outside rolling stock: Measuring all 3 axis of the magnetic field in static condition for a duration of (30 60) s. 5.4.2 Infrastructure Monitor the current effecting the magnetic field at the same time of magnetic field measurement. During measurement dif
44、ferent railway related and other magnetic field sources may contribute to measuring result. During measurement on open railway line no electric active rolling stock shall be between the substation and the magnetic field measurement point. BS EN 50500:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA S
45、TANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c) BSIEN 50500:2008 - 14 - 6 Report Guidelines to the report can be found in EN ISO/IEC 17025. The following information pertaining to the instrumentation and measurements should also be provided in all cases: - date of measurements; - post processing
46、method; - time of measurements; - test set-up; - environmental condition (e.g. weather conditions); - measurement uncertainty; - ICNIRP value of each performed assessment; - spectrum analysis for selected places (e.g. with high emission or requested from third party); - any deviation from the given
47、test conditions (e.g. measurement duration, maximum currents) with a justification. The following should be specifically noted during the rolling stock tests: - track and direction of travel; - train configuration - vehicles of the rolling stock and their relative position; - the approximate weight
48、of the rolling stock (crush load or tare); - the position of the active pantograph(s); - feeding station(s); - nature of the return circuit (double track/single track) and cables for return current; - location of booster transformers and feeding stations related to the measuring positions. It is als
49、o recommended as far as possible to record the line current corresponding to the total consumption of the rolling stock, and preferably also the rolling stock speed and catenaries voltage. Other information which should be provided, when appropriate, includes drawings which describe the area and locations where measurements are performed. BS EN 50500:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/11/2008 07:45, Uncontrolled Copy, (c) BSI- 15 - EN 50500:2008 Annex A (normative) Test plan A.1 General Verification of
