1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Static meters for active energy (class indexes A, B and C)The European Standard EN 50470-3:2006 has
2、 the status of a British StandardICS 91.140.50Electricity metering equipment (a.c.) Part 3: Particular requirements BRITISH STANDARDBS EN 50470-3:2006BS EN 50470-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006I
3、SBN 0 580 49812 3Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementat
4、ion of EN 50470-3:2006.The UK participation in its preparation was entrusted to Technical Committee PEL/13, Electricity meters.A list of organizations represented on PEL/13 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EURO
5、PEAN STANDARD EN 50470-3 NORME EUROPENNE EUROPISCHE NORM October 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENEL
6、EC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50470-3:2006 E ICS 91.140.50 English version Electricity metering equipment (a.c.) Part 3: Particular requirements - Static meters for active energy (class indexes A, B and C) Equipement
7、de comptage dlectricit (c.a.) Partie 3: Prescriptions particulires - Compteurs statiques dnergie active (classes de prcision A, B et C) Wechselstrom-Elektrizittszhler Teil 3: Besondere Anforderungen - Elektronische Wirkverbrauchszhler der Genauigkeitsklassen A, B und C This European Standard was app
8、roved by CENELEC on 2006-05-01. 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 references concerning such nat
9、ional 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 CENELEC member into its own langua
10、ge and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuan
11、ia, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 50470-3:2006 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 13, Equipment for electrical energy measurement and l
12、oad control. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50470-3 on 2006-05-01. The following 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 endo
13、rsement (dop) 2007-05-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-05-01 This EN 50470-3 is related to: EN 62053-21:2003, Electricity metering equipment (a.c.) Particular requirements Part 21: Static meters for active energy (classes 1 and 2)
14、 and EN 62053-22:2003, Electricity metering equipment (a.c.) Particular requirements Part 22: Static meters for active energy (classes 0,2 S and 0,5 S). The structure of the standards is similar, modifications in this Euroepan Standard are provided in the perspective of compliance with the Essential
15、 Requirements of the Directive 2004/22/EC on Measuring Instruments (MID). This standard is to be used with EN 50470-1:2006, Electricity metering equipment (a.c.) Part 1: General requirements, tests and test conditions Metering equipment (class indexes A, B and C). This European Standard has been pre
16、pared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive 2004/22/EC. See Annex ZZ. _ 3 EN 50470-3:2006 Contents 1 Scope.5 2 Normative references .5 3 Terms, definitions and abbreviations 5 4 Standard e
17、lectrical values 6 5 Mechanical requirements6 6 Climatic conditions .6 7 Electrical requirements .6 7.1 Power consumption .6 7.1.1 Measurement method 6 7.1.2 Voltage circuits6 7.1.3 Current circuits 6 7.2 AC voltage test7 8 Accuracy requirements and tests7 8.1 Limits of percentage error due to varia
18、tion of the load .7 8.2 Repeatability .8 8.3 Limits of additional percentage error due to influence quantities8 8.4 Maximum permissible error (MPE).10 8.5 Effect of disturbances of long duration.10 8.6 Short time overcurrents .12 8.7 Performing the tests 12 8.7.1 Accuracy test conditions12 8.7.2 Acc
19、uracy tests at reference conditions 13 8.7.3 Interpretation of accuracy test results 14 8.7.4 Repeatability .14 8.7.5 Test of effects of influence quantities.14 8.7.6 Calculation of the composite error .15 8.7.7 Test of effects of disturbances of long duration15 8.7.8 Short time overcurrents .18 8.7
20、.9 Test of starting and no-load condition19 8.7.10 Meter constant.20 9 Durability20 10 Reliability .20 11 Requirements concerning the software and protection against corruption .21 11.1 General .21 11.2 Identification of functions implemented in software21 11.3 Identification and protection of softw
21、are 21 11.4 Identification and protection of metrologically relevant parameters 21 11.5 Setting of parameters 22 11.6 Protection of measurement data22 11.7 Protection against inadmissible influence by metrologically non-relevant software 22 11.8 Protection against inadmissible influence by connectin
22、g another device22 Annex A (informative) Calculation of the composite error .23 Annex B (normative) Test circuit diagram for the test of immunity to earth fault .24 EN 50470-3:2006 4 Annex C (normative) Test circuit diagram for d.c., even harmonics, odd harmonics and sub-harmonics25 Annex ZZ (inform
23、ative) Coverage of Essential Requirements of EC Directives.30 Bibliography31 Figures Figure B.1 Circuit to simulate earth fault condition in phase 1 24 Figure B.2 Voltages at the meter under test .24 Figure C.1 Test circuit diagram for half-wave rectification 25 Figure C.2 Half-wave rectified wavefo
24、rm26 Figure C.3 Informative distribution of half-wave harmonic content (the Fourier analysis is not complete) 26 Figure C.4 Test circuit diagram (informative)27 Figure C.5 Phase fired waveform .28 Figure C.6 Informative distribution of harmonic content of phase fired waveform (the Fourier analysis i
25、s not complete) 28 Figure C.7 Burst fired waveform.29 Figure C.8 Informative distribution of harmonic content of burst fired waveform (the Fourier analysis is not complete) 29 Tables Table 1 Power consumption in voltage circuits .6 Table 2 Power consumption in current circuits .7 Table 3 AC voltage
26、tests7 Table 4 Percentage error limits at reference conditions (single-phase meters and polyphase meters with balanced loads) 8 Table 5 Percentage error limits at reference conditions (polyphase meters carrying a single-phase load, but with balanced polyphase voltages applied to voltage circuits) 8
27、Table 6 Limits of additional percentage error due to influence quantities (single-phase meters and polyphase meters with balanced loads)9 Table 7 Limits of additional percentage error due to influence quantities (polyphase meters carrying a single phase load, but with balanced polyphase voltages app
28、lied to voltage circuits)9 Table 8 Maximum permissible error (MPE).10 Table 9 Effect of disturbances of long duration Critical change values 11 Table 10 Effect of short time overcurrents Critical change value .12 Table 11 Voltage and current balance12 Table 12 Reference conditions.13 Table 13 Test p
29、oints determining the intrinsic error and the additional percentage error due to influence quantities .14 Table 14 Interpretation of test results.14 Table 15 Starting current .19 5 EN 50470-3:2006 1 Scope This European Standard applies to newly manufactured static watt-hour meters intended for resid
30、ential, commercial and light industrial use, of class indexes A, B and C, for the measurement of alternating current electrical active energy in 50 Hz networks. It specifies particular requirements and type test methods. It applies to static watt-hour meters for indoor and outdoor application, consi
31、sting of a measuring element and register(s) enclosed together in a meter case. It also applies to operation indicator(s) and test output(s). If the meter has (a) measuring element(s) for more than one type of energy (multi-energy meters), or when other functional elements, like maximum demand indic
32、ators, electronic tariff registers, time switches, ripple control receivers, data communication interfaces etc. are enclosed in the meter case (multi-function meters) then this standard applies only for the active energy metering part. This standard distinguishes between: meters of class indexes A,
33、B and C; direct connected and transformer operated meters; meters for use in networks equipped with or without earth fault neutralizers. It does not apply to: watt-hour meters where the voltage across the connection terminals exceeds 600 V (line-to-line voltage for meters for polyphase systems); por
34、table meters; reference meters. Methods for acceptance testing are covered by the IEC 62058 series of standards 1). The dependability aspect is covered by the documents of the IEC 62059 series. 2 Normative references The following referenced documents are indispensable for the application of this do
35、cument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Publication Year Title EN 50470-1 2006 Electricity metering equipment (a.c.) Part 1: General requirements, tests and test conditions
36、 Metering equipment (class indexes A, B and C) EN 62059-41 2006Electricity metering equipment Dependability Part 41: Reliability prediction (IEC 62059-41:2006) 3 Terms, definitions and abbreviations For the purposes of this document, the terms and definitions given in EN 50470-1 apply. 1)At draft st
37、age. EN 50470-3:2006 6 4 Standard electrical values The values given in EN 50470-1 apply. 5 Mechanical requirements The requirements given in EN 50470-1 apply. 6 Climatic conditions The conditions given in EN 50470-1 apply. 7 Electrical requirements In addition to the electrical requirements in EN 5
38、0470-1, meters shall fulfil the following requirements. 7.1 Power consumption 7.1.1 Measurement method The power consumption in the voltage and current circuits shall be determined at reference conditions given in 8.7.1 by any suitable method. The overall maximum error of the measurement of the powe
39、r consumption shall not exceed 5 %. 7.1.2 Voltage circuits The active and apparent power loss in each voltage circuit of a meter at reference voltage, reference temperature and reference frequency shall not exceed the values shown in Table 1. Table 1 Power consumption in voltage circuits Meters (sin
40、gle- and polyphase) Power supply connected to the voltage circuits Power supply not connected to the voltage circuits Power consumption in voltage circuit 2 W and 10 VA 0,5 VA Power consumption of auxiliary power supply - 10 VA NOTE 1 In order to match voltage transformers to meters, the meter manuf
41、acturer should state the power factor of the burden (for transformer operated meters only). NOTE 2 The above figures are mean values. Switching power supplies with peak power values in excess of these specified values are permitted, but it should be ensured that the rating of associated voltage tran
42、sformers is adequate. NOTE 3 For multifunctional meters see EN 62053-61. 7.1.3 Current circuits The apparent power taken by each current circuit of a meter at reference current, reference frequency and reference temperature shall not exceed the values shown in Table 2. 7 EN 50470-3:2006 Table 2 Powe
43、r consumption in current circuits Class index Meters, (single- and polyphase) Test current A B C Direct connected Iref = 10 Itr 2,5 VA 4,0 VA 4,0 VA Transformer operated In 1,0 VA 1,0 VA 1,0 VA NOTE In order to match current transformers to meters, the meter manufacturer should state the power facto
44、r of the burden (for transformer operated meters only). 7.2 AC voltage test The a.c. voltage test shall be carried out in accordance with Table 3. The test voltage shall be substantially sinusoidal, having a frequency between 45 Hz and 65 Hz, and applied for 1 min. The power source shall be capable
45、of supplying at least 500 VA. For the tests relative to earth, the auxiliary circuits with reference voltage equal to or below 40 V shall be connected to earth. All tests shall be carried out with the case closed and the cover and terminal cover(s) in place. During this test no flashover, disruptive
46、 discharge or puncture shall occur. Table 3 AC voltage tests Test Applicable to Test voltage r.m.s. Points of application of the test voltage 2 kV a) Between, on the one hand, all the current and voltage circuits as well as the auxiliary circuits whose reference voltage is over 40 V, connected toget
47、her, and, on the other hand, earth. A Protective class I meters 2 kV b) Between circuits not intended to be connected together in service. 4 kV a) Between, on the one hand, all the current and voltage circuits as well as the auxiliary circuits whose reference voltage is over 40 V, connected together
48、, and, on the other hand, earth. B Protective class II meters 2 kV b) Between circuits not intended to be connected together in service. 8 Accuracy requirements and tests 8.1 Limits of percentage error due to variation of the load When the meter is under reference conditions given in 8.7.1, and the
49、current and the power factor are varied, the percentage errors shall not exceed the limits specified for the relevant class indexes in Table 4 and Table 5. If the meter is designed for the measurement of energy in both directions, the values in Table 4 and Table 5 shall apply for each direction. EN 50470-3:2006 8 Table 4 Percentage error limits at reference conditions (single-phase meters
