1、BRITISH STANDARDBS EN 61557-12:2008Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures Part 12: Performance measuring and monitoring devices (PMD)ICS 17.220.20; 29.080.01; 29.240.01g49g50g3g38
2、g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61557-12:2008This British Standard was published under the authority of the Standards Policy and Strategy
3、 Committee on 30 June 2008 BSI 2008ISISBN 978 0 580 56285 3National forewordThis British Standard is the UK implementation of EN 61557-12:2008. It is identical to IEC 61557-12:2007. The UK participation in its preparation was entrusted to Technical Committee PEL/85, Measuring equipment for electrica
4、l and electromagnetic quantities.A list of 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 Stan
5、dard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARD EN 61557-12 NORME EUROPENNE EUROPISCHE NORM May 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europis
6、ches 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 61557-12:2008 E ICS 17.220.20; 29.080.01; 29.240.01 English version Electric
7、al safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 12: Performance measuring and monitoring devices (PMD) (IEC 61557-12:2007) Scurit lectrique dans les rseaux de distribution basse tension d
8、e 1 000 V c.a. et 1 500 V c.c. - Dispositifs de contrle, de mesure ou de surveillance de mesures de protection -Partie 12: Dispositifs de mesure et de surveillance des performances (PMD) (CEI 61557-12:2007) Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Gerte zum Prf
9、en, Messen oder berwachen von Schutzmanahmen - Teil 12: Kombinierte Gerte zur Messung und berwachung des Betriebsverhaltens(IEC 61557-12:2007) This European Standard was approved by CENELEC on 2008-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate t
10、he 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 member. This European Standard exis
11、ts 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. CENELEC members are the national elect
12、rotechnical 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, Slovenia, Spain, Sweden, Switzer
13、land and the United Kingdom. Foreword The text of document 85/311/FDIS, future edition 1 of IEC 61557-12, prepared by IEC TC 85, Measuring equipment for electrical and electromagnetic quantities, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61557-12 on 2008-04-01.
14、 This standard is to be used in conjunction with EN 61557-1:2007 (unless otherwise specified). 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 endorsement (dop) 2009-01-01 latest date by which
15、the national standards conflicting with the EN have to be withdrawn (dow) 2011-04-01 This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive 2004/108/EC. See Annex Z
16、Z. Annexes ZA and ZZ have been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61557-12:2007 was approved by CENELEC as a European Standard without any modification. _ BS EN 61557-12:2008 2 CONTENTS INTRODUCTION.7 1 Scope.8 2 Normative references .9 3 Terms and defi
17、nitions .10 3.1 General definitions 10 3.2 Definitions related to uncertainty and performance 11 3.3 Definitions related to electric phenomena 14 3.4 Definitions related to measurement techniques .17 3.5 Notations.17 3.5.1 Functions 17 3.5.2 Symbols and abbreviations18 3.5.3 Indices 18 4 Requirement
18、s .18 4.1 General requirements18 4.2 PMD general architecture19 4.3 Classification of PMD 19 4.4 List of applicable performance classes 20 4.4.1 List of applicable function performance classes for PMD without external sensors 20 4.4.2 List of applicable system performance classes for PMD with extern
19、al sensors 21 4.5 Operating and reference conditions for PMD .21 4.5.1 Reference conditions.21 4.5.2 Rated operating conditions 21 4.6 Start-up conditions 23 4.7 Requirements for PMD functions (except PMD-A)23 4.7.1 Active power (P) and active energy (Ea) measurements 23 4.7.2 Reactive power (QA, QV
20、) and reactive energy (ErA, ErV) measurements 28 4.7.3 Apparent power (SA, SV) and apparent energy (EapA, EapV) measurements.31 4.7.4 Frequency (f) measurements .33 4.7.5 R.m.s. phase current (I) and neutral current (IN, INc) measurements34 4.7.6 R.m.s. voltage (U) measurements39 4.7.7 Power factor
21、(PFA, PFV) measurements 39 4.7.8 Short term flicker (Pst)and long term flicker (Plt) measurements.39 4.7.9 Voltage dip (Udip) and voltage swell (Uswl) measurements .40 4.7.10 Transients overvoltage (Utr) measurements 42 4.7.11 Voltage interruption (Uint) measurements42 4.7.12 Voltage unbalance (Unb,
22、 Unba) measurements .43 4.7.13 Voltage harmonics (Uh) and voltage THD (THDuand THD-Ru) measurements.44 BS EN 61557-12:2008 3 4.7.14 Current harmonics (Ih) and current THD (THDiand THD-Ri) measurements.45 4.7.15 Minimum, maximum, peak, three-phases average and demand measurements.46 4.8 Requirements
23、for PMD-A functions46 4.9 General mechanical requirements .47 4.9.1 Vibration requirements 47 4.9.2 IP requirements .47 4.10 Safety requirements 48 4.10.1 Clearances and creepage distances 48 4.10.2 Connection of a fixed installed PMD with a current transformer .48 4.10.3 Connection of a PMD with a
24、high voltage sensor .48 4.10.4 Accessible parts 48 4.10.5 Hazardous live parts49 4.11 Analog outputs 49 4.11.1 General requirements 49 4.11.2 Compliance voltage .49 4.11.3 Analog output ripple content 49 4.11.4 Analog output response time .49 4.11.5 Limiting value of the analog output signal 49 4.11
25、.6 Pulse outputs 50 5 Marking and operating instructions .50 5.1 Marking .50 5.2 Operating and installation instructions.50 5.2.1 General characteristics50 5.2.2 Essential characteristics 51 5.2.3 Safety characteristics 53 6 Tests 53 6.1 Type tests of PMD.53 6.1.1 Test of temperature influence 54 6.
26、1.2 Active power54 6.1.3 Apparent power .57 6.1.4 Power factor 57 6.1.5 Common mode voltage rejection test .57 6.1.6 Frequency .58 6.1.7 Measurement of voltage harmonics .58 6.1.8 Measurement of current harmonics58 6.1.9 Dips and swells .59 6.1.10 Voltage interruptions .59 6.1.11 Outputs tests .59 6
27、.1.12 Climatic tests.60 6.1.13 EMC tests61 6.1.14 Start up tests.61 6.2 Type tests of PMD-A .61 6.3 Routine tests .61 6.3.1 Protective bonding test 61 6.3.2 Dielectric strength test.62 6.3.3 Uncertainty test .62 BS EN 61557-12:2008 4 Annex A (informative) Definitions of electrical parameters .63 Ann
28、ex B (normative) Definitions of minimum, maximum, peak and demand values 67 Annex C (informative) Intrinsic uncertainty, operating uncertainty, and overall system uncertainty69 Annex D (informative) Recommended sensor classes for the different kinds of PMD71 Annex E (normative) Requirements applicab
29、le to PMD and to PMD-A74 Bibliography75Figure 1 PMD generic measurement chain.19 Figure 2 Description of different types of PMD .20 Figure 3 Relationship between ambient air temperature and relative humidity23 Figure 4 Waveform for odd harmonics influence test on active power measurement 54 Figure 5
30、 Spectral content for odd harmonics influence test on active power measurement.55 Figure 6 Waveform for sub-harmonics influence test on active power measurement 56 Figure 7 Spectral content for sub-harmonics influence test on active power measurement.56 Figure 8 Common mode voltage influence testing
31、 57 Figure 9 Waveform for harmonics influence test on frequency measurement58 Figure A.1 Arithmetic and vector apparent powers in sinusoidal situation.65 Figure A.2 Geometric representation of active and reactive power .66 Figure B.1 Thermal current demand.67 Figure C.1 Different kind of uncertainti
32、es .69 Table 1 Classification of PMD 20 Table 2 List of applicable function performance classes for PMD without external sensors 20 Table 3 List of applicable system performance classes for PMD with external sensors.21 Table 4 Reference conditions for testing 21 Table 5 Rated operating temperatures
33、for portable equipment .22 Table 6 Rated operating temperatures for fixed installed equipment 22 Table 7 Humidity and altitude operating conditions 22 Table 8 Intrinsic uncertainty table for active power and active energy measurement 24 Table 9 Influence quantities for active power and active energy
34、 measurement.25 Table 10 Starting current for active power and active energy measurement .28 Table 11 Intrinsic uncertainty table for reactive power and reactive energy measurement .28 Table 12 Influence quantities for reactive power and reactive energy measurement.29 Table 13 Starting current for r
35、eactive energy measurement .31 Table 14 Intrinsic uncertainty table for apparent power and apparent energy measurement 31 Table 15 Influence quantities for apparent power and apparent energy measurement32 Table 16 Intrinsic uncertainty table for frequency measurement .33 Annex ZA (normative) Normati
36、ve references to international publications with their corresponding European publications77 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives79 BS EN 61557-12:2008 5 Table 20 Intrinsic uncertainty table for phase current .35 Table 21 Intrinsic uncertainty table for neutral
37、current measurement35 Table 22 Intrinsic uncertainty table for neutral current calculation 35 Table 23 Influence quantities for phase current and neutral current measurement .36 Table 24 Rated range of operation for r.m.s. voltage measurement37 Table 25 Intrinsic uncertainty table for r.m.s. voltage
38、 measurement .37 Table 26 Influence quantities for r.m.s. voltage measurement 38 Table 27 Intrinsic uncertainty table for power factor measurement .39 Table 28 Intrinsic uncertainty table for flicker measurement .39 Table 29 Rated range of operation for voltage dips and swells measurement.40 Table 3
39、0 Intrinsic uncertainty table for voltage dips and swells measurement 40 Table 31 Influence quantities for dips and swells measurement .41 Table 32 Intrinsic uncertainty table for transient overvoltage measurement42 Table 33 Intrinsic uncertainty table for voltage interruption measurement 43 Table 3
40、4 Intrinsic uncertainty table for voltage unbalance measurement 43 Table 35 Rated range of operation for voltage harmonics measurement 44 Table 36 Intrinsic uncertainty table for voltage harmonics measurement 44 Table 37 Intrinsic uncertainty table for voltage THDuor THD-Rumeasurement .44 Table 38 R
41、ated range of operation for current harmonics measurement.45 Table 39 Intrinsic uncertainty table for current harmonics measurement 45 Table 40 Intrinsic uncertainty table for current THDiand THD-Rimeasurement .46 Table 41 Complementary characteristics of PMD-A47 Table 42 Minimum IP requirements for
42、 PMD 48 Table 43 PMD specification form51 Table 44 Characteristics specification template52 Table 45 Characteristics specification template53 Table A.1 Symbols definition63 Table A.2 Calculation definitions of electrical parameters, for 3 phase unbalanced system with neutral.64 Table D.1 PMD SD asso
43、ciated to current sensor or PMD DS associated to voltage sensor 71 Table D.2 PMD SS with Current Sensor and Voltage Sensor association .72 Table D.3 Range of applicable performance classes for PMD without its associated external sensors .73 Table D.4 Range of applicable performance classes when calc
44、ulating performance class of PMD with its associated external sensors .73 Table D.5 List of functions affected by uncertainty of external sensors.73 Table E.1 Requirements applicable to PMD and to PMD-A.74 Table 17 Influence quantities for frequency measurement33 Table 18 Rated range of operation fo
45、r phase current measurement .34 Table 19 Rated range of operation for neutral current measurement 34 BS EN 61557-12:2008 6 INTRODUCTION As a complement to protection measures, it becomes more and more necessary to measure different electrical parameters, in order to monitor the required performances
46、 in energy distribution systems due to: installation standards evolutions, for instance over current detection is now a new requirement for the neutral conductor due to harmonic content; technological evolutions (electronic loads, electronic measuring methods, etc.); end-users needs (cost saving, co
47、mpliance with aspects of building regulations, etc); safety and continuity of service; sustainable development requirements where energy measurement for instance is recognised as an essential element of energy management, part of the overall drive to reduce carbon emissions and to improve the commer
48、cial efficiency of manufacturing, commercial organisations and public services. The devices on the current market have different characteristics, which need a common system of references. Therefore there is a need for a new standard in order to facilitate the choices of the end-users in terms of per
49、formance, safety, interpretation of the indications, etc. This standard provides a basis by which such devices can be specified and described, and their performance evaluated. BS EN 61557-12:2008 7 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO 1 000 V a.c. AND 1 500 V d.c. EQUIPMENT FOR TESTING, MEASURING OR MONITORING OF PROTECTIVE MEASURES Part 12: Performance measuring and moni
