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1、BRITISH STANDARD BS EN 61557-12:2008 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 monitoring devices (PMD) ICS 17.220.20; 29.080.01; 29.240.01 ? BS EN
2、 61557-12:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2008 BSI 2008 ISISBN 978 0 580 56285 3 National foreword This British Standard is the UK implementation of EN 61557-12:2008. It is identical to IEC 61557-12:2007. The UK p
3、articipation in its preparation was entrusted to Technical Committee PEL/85, Measuring equipment for electrical 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 nece
4、ssary 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 publication DateComments EUROPEAN STANDARD EN 61557-12 NORME EUROPENNE EUROPISCHE NORM May 2008 CENE
5、LEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation 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 worl
6、dwide for CENELEC members. Ref. No. EN 61557-12:2008 E ICS 17.220.20; 29.080.01; 29.240.01 English version 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 measurin
7、g and monitoring devices (PMD) (IEC 61557-12:2007) Scurit lectrique dans les rseaux de distribution basse tension de 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 (PM
8、D) (CEI 61557-12:2007) Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Gerte zum Prfen, 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 C
9、ENELEC on 2008-04-01. 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 national stan
10、dards 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 language and not
11、ified 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, Iceland, Ireland, Italy, Latvia, Lithuan
12、ia, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
13、 quantities, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61557-12 on 2008-04-01. 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 nat
14、ional level by publication of an identical national standard or by endorsement (dop) 2009-01-01 latest date by which 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 Commissi
15、on and the European Free Trade Association and covers essential requirements of EC Directive 2004/108/EC. See Annex ZZ. 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 a
16、ny modification. _ BS EN 61557-12:2008 2 w w w . b z f x w . c o m CONTENTS INTRODUCTION.7 1 Scope.8 2 Normative references .9 3 Terms and definitions .10 3.1 General definitions 10 3.2 Definitions related to uncertainty and performance11 3.3 Definitions related to electric phenomena14 3.4 Definitio
17、ns 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 Requirements.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 applica
18、ble function performance classes for PMD without external sensors20 4.4.2 List of applicable system performance classes for PMD with external sensors21 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
19、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) 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.3
20、3 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 (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) measurement
21、s .40 4.7.10 Transients overvoltage (Utr) measurements 42 4.7.11 Voltage interruption (Uint) measurements42 4.7.12 Voltage unbalance (Unb, Unba) measurements .43 4.7.13 Voltage harmonics (Uh) and voltage THD (THDu and THD-Ru) measurements.44 BS EN 61557-12:2008 3 w w w . b z f x w . c o m 4.7.14 Cur
22、rent harmonics (Ih) and current THD (THDi and THD-Ri) measurements.45 4.7.15 Minimum, maximum, peak, three-phases average and demand measurements.46 4.8 Requirements 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 req
23、uirements 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 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 requirements49 4
24、.11.2 Compliance voltage .49 4.11.3 Analog output ripple content49 4.11.4 Analog output response time .49 4.11.5 Limiting value of the analog output signal49 4.11.6 Pulse outputs 50 5 Marking and operating instructions .50 5.1 Marking.50 5.2 Operating and installation instructions.50 5.2.1 General c
25、haracteristics50 5.2.2 Essential characteristics51 5.2.3 Safety characteristics 53 6 Tests53 6.1 Type tests of PMD.53 6.1.1 Test of temperature influence 54 6.1.2 Active power54 6.1.3 Apparent power .57 6.1.4 Power factor57 6.1.5 Common mode voltage rejection test.57 6.1.6 Frequency .58 6.1.7 Measur
26、ement 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 6.1.12 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 te
27、st61 6.3.2 Dielectric strength test.62 6.3.3 Uncertainty test .62 BS EN 61557-12:2008 4 w w w . b z f x w . c o m Annex A (informative) Definitions of electrical parameters .63 Annex B (normative) Definitions of minimum, maximum, peak and demand values 67 Annex C (informative) Intrinsic uncertainty,
28、 operating uncertainty, and overall system uncertainty69 Annex D (informative) Recommended sensor classes for the different kinds of PMD71 Annex E (normative) Requirements applicable to PMD and to PMD-A74 Bibliography75 Figure 1 PMD generic measurement chain.19 Figure 2 Description of different type
29、s 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 Spectral content for odd harmonics influence test on active power measurement.55 Figure 6 Waveform for sub-harmonics i
30、nfluence 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 57 Figure 9 Waveform for harmonics influence test on frequency measurement58 Figure A.1 Arithmetic and vector apparent
31、 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 uncertainties .69 Table 1 Classification of PMD 20 Table 2 List of applicable function performance classes for PMD without externa
32、l 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 for portable equipment .22 Table 6 Rated operating temperatures for fixed installed equipment 22 Table 7 Humidity and a
33、ltitude 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 measurement.25 Table 10 Starting current for active power and active energy measurement .28 Table 11 Intrinsic uncerta
34、inty 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 reactive energy measurement .31 Table 14 Intrinsic uncertainty table for apparent power and apparent energy measurement 3
35、1 Table 15 Influence quantities for apparent power and apparent energy measurement32 Table 16 Intrinsic uncertainty table for frequency measurement.33 Annex ZA (normative) Normative references to international publications with their corresponding European publications77 Annex ZZ (informative) Cover
36、age of Essential Requirements of EC Directives79 BS EN 61557-12:2008 5 w w w . b z f x w . c o m Table 20 Intrinsic uncertainty table for phase current.35 Table 21 Intrinsic uncertainty table for neutral current measurement35 Table 22 Intrinsic uncertainty table for neutral current calculation 35 Ta
37、ble 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 measurement .37 Table 26 Influence quantities for r.m.s. voltage measurement38 Table 27 Intrins
38、ic 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 30 Intrinsic uncertainty table for voltage dips and swells measurement 40 Table 31 Influence quanti
39、ties 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 34 Intrinsic uncertainty table for voltage unbalance measurement 43 Table 35 Rated range of operati
40、on for voltage harmonics measurement 44 Table 36 Intrinsic uncertainty table for voltage harmonics measurement 44 Table 37 Intrinsic uncertainty table for voltage THDu or THD-Ru measurement .44 Table 38 Rated range of operation for current harmonics measurement.45 Table 39 Intrinsic uncertainty tabl
41、e for current harmonics measurement 45 Table 40 Intrinsic uncertainty table for current THDi and THD-Ri measurement .46 Table 41 Complementary characteristics of PMD-A47 Table 42 Minimum IP requirements for PMD 48 Table 43 PMD specification form51 Table 44 Characteristics specification template52 Ta
42、ble 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 associated to current sensor or PMD DS associated to voltage sensor 71 Table D.2 PMD SS with Curre
43、nt 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 calculating performance class of PMD with its associated external sensors .73 Table D.5 List of fun
44、ctions 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 for phase current measurement .34 Table 19 Rated range of operation for neutral current measureme
45、nt 34 BS EN 61557-12:2008 6 w w w . b z f x w . c o m 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 in energy distribution systems due to: installation standards evolut
46、ions, 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, compliance with aspects of building regulations, etc); safety and conti
47、nuity 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 commercial efficiency of manufacturing, commercial organisations and public
48、 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 performance, 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 w w w . b z f x w . c o m 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 MONITOR