1、BRITISH STANDARD BS 89-2: 1990 EN 60051-2: 1989 IEC 51-2: 1984 Direct acting indicating analogue electrical measuring instruments and their accessories Part 2: Specification for special requirements for ammeters and voltmeters This European Standard EN60051-2 has the status of a British Standard UDC
2、: 621.317.725.037.33BS89-2:1990 This British Standard was published under the authorityofthe Board of BSIandcomes intoeffecton 31August1990 BSI 01-2000 First published as BS89October1919 Second edition August1926 Third edition September1937 Fourth edition February1954 Fifth edition March1977 Publish
3、ed as BS 89-2 August1990 The following BSI references relate to the work on this standard: Committee reference PEL/13 Draft for comment 80/23262 DC ISBN 0 580 18437 4 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this Europea
4、n Standard was prepared, comprises the National Committees of the following countries. Austria Italy Belgium Luxemburg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date of issue
5、CommentsBS89-2:1990 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 60051-2 5 National appendix W Inside back coverBS89-2:1990 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the
6、Power Electrical Engineering Standards Policy Committee and is the English language version of EN60051-2 “Direct acting indicating analogue electrical measuring instruments and their accessories Part 2: Special requirements for ammeters and voltmeters”, published by the European Committee for Electr
7、otechnical Standardization (CENELEC). It is identical to the English language version of IEC Publication51-2 published by the International Electrotechnical Commission (IEC) as amended by the editorial corrections listed in the Technical text source on page2. For the purposes of this British Standar
8、d, any references to the IEC page numbers in the text should be ignored. This Part of BS89 together with Parts1,3,4,5,6,7,8 and9 of this Standard supersedes BS89:1977, which is withdrawn. BS 89 comprises the following parts which will be the English language version of the listed European Standards.
9、 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. European Standard Corresponding Part of
10、BS89 EN 60051-1 Part 1 Specification for definitions and general requirements common to all parts EN 60051-2 Part 2 Specification for special requirements for ammeters and voltmeters EN 60051-3 Part 3 Specification for special requirements for wattmeters and varmeters EN 60051-4 Part 4 Specification
11、 for special requirements for frequency meters EN 60051-5 Part 5 Specification for special requirements for phase meters power factor meters and synchroscopes EN 60051-6 Part 6 Specification for special requirements for ohmeters (impedance meters) and conductance meters EN 60051-7 Part 7 Specificati
12、on for special requirements for multi-function instruments EN 60051-8 Part 8 Specification for special requirements for accessories EN 60051-9 Part 9 Recommended test methods Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to12, a
13、n inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60051-2 November1989 UDC: 621.317.725.037.33
14、 Key words: Electrical measuring instruments; analogue indicating instruments; direct acting measuring instruments; accessories for electrical measuring instruments; ammeters; voltmeters English version Direct acting indicating analogue electrical measuringinstruments and their accessories Part2:Spe
15、cial requirements for ammeters and voltmeters (IEC 51-2:1984 edition4) Appareils mesureurs lectriques indicateurs analogiques action directe et leurs accessoires Deuxime partie: Prescriptions particulires pour les ampremtres et les voltmtres (CEI51-2:1984 dition4) Direkt wirkende anzeigende elektris
16、che Megerte und ihr Zubehr Megerte mit Skalenanzeige Teil 2: Spezielle Anforderungen fr Strom- und Spannungs-Megerte (IEC51-2:1984 Ausgabe4) This European Standard was ratified by CENELEC on11 September1989. CENELEC members are bound to comply with the requirements of the CENELEC Internal Regulation
17、s 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 CENELEC Central Secretariat or to any CENELEC member.
18、This European Standard exists in three official versions (English, French and German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to CENELEC Central Secretariat has the same status as the official versions. CENE
19、LEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Co
20、mit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels CENELEC 1989 Copyright reserved to all CENELEC members Ref. No. EN60051-2:1989 EEN60051-2:1989 BSI 01-2000 2 Brief history The text of IEC Publicati
21、on51-2 (4th edition 1984) was submitted to the CENELEC members for unique acceptance. Technical text The text of the International Standard IEC51-2 (4th edition 1984) was approved by CENELEC on11September1989 as a European Standard with the following editorial correction to the English version: Tabl
22、e II-2, note3, paragraph a: delete the words “instrument” and “capability”. The following dates are applicable: Foreword 1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the National Committees having a special interest therein are
23、represented, express, as nearly as possible, an international consensus of opinion on the subjects dealt with. 2) They have the form of recommendations for international use and they are accepted by the National Committees in that sense. 3) In order to promote international unification, the IEC expr
24、esses the wish that all National Committees should adopt the text of the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between the IEC recommendation and the corresponding national rules should, as far as possible, be clearly indicated in th
25、e latter. Preface This standard has been prepared by IEC Technical Committee No.85: Measuring Equipment for Basic Electrical Quantities (formerly Sub-Committee13B: Electrical Measuring Instruments). This fourth edition replaces the third edition of IECPublication51. This standard constitutes Part2.
26、The general layout for the revised Publication51 is as follows: Part 1: Definitions and General Requirements Common to all Parts; Part 2: Special Requirements for Ammeters and Voltmeters; Part 3: Special Requirements for Wattmeters and Varmeters; Part 4: Special Requirements for Frequency Meters; Pa
27、rt 5: Special Requirements for Phase Meters, Power Factor Meters and Synchroscopes; Part 6: Special Requirements for Ohmmeters (Impedance Meters) and Conductance Meters; Part 7: Special Requirements for Multi-function Instruments; Part 8: Special Requirements for Accessories; Part 9: Recommended Tes
28、t Methods. Parts2 to9 are not complete in themselves and shall be read in conjunction with Part1. All of these parts are arranged in the same format and a standard relationship between subject and clause number is maintained throughout. In addition, tables, figures and appendices add a suffix to the
29、 part number in order to differentiate the parts. This re-arrangement will assist the reader of IEC Publication51 to distinguish information relating to the different types of instruments. The text of this standard is based upon the following documents: Further information can be found in the Report
30、 on Voting indicated in the table above. The following IEC publication is quoted in this standard: Publication No. 185 (1966): Current Transformers. latest date of announcement of the ENatnational level (doa): 1990-03-01 date of latest publication ofa new harmonized standard (dop): 1990-09-01 date o
31、f withdrawal of conflicting national standards (dow): 1990-09-01 Six Months Rule Report on Voting 13B(CO)94 13B(CO)101EN60051-2:1989 BSI 01-2000 3 Contents Page Brief history 2 Foreword 2 1 Scope 5 2 Definitions 5 3 Description, classification and compliance 5 4 Reference conditions and intrinsic er
32、rors 5 5 Nominal range of use and variations 6 6 Further electrical and mechanical requirements 8 7 Constructional requirements 10 8 Information, general markings and symbols 11 9 Markings and symbols for terminals 11 10 Tests to prove compliance with this standard 11 Table IV-2 Overloads of short d
33、uration 104 blankEN60051-2:1989 BSI 01-2000 5 1 Scope 1.1 Part 2 of the standard applies to direct acting indicating ammeters and voltmeters having an analogue display. NOTEFor multi-function instruments, see Part7. 1.2 This part also applies to non-interchangeable accessories (as defined in Sub-cla
34、use 2.1.15.3 of Part1) used with ammeters and voltmeters. 1.3 to 1.8 See Part 1. 2 Definitions See Part 1. 3 Description, classification and compliance 3.1 Description Ammeters and voltmeters shall be described according to their method of operation as given in Sub-clause2.2 of Part 1. 3.2 Classific
35、ation Ammeters and voltmeters shall be classified in one of the accuracy classes denoted by the following class indices: 3.3 Compliance with the requirements of this standard See Part 1. 4 Reference conditions and intrinsic errors 4.1 Reference conditions See Part 1. 4.2 Limits of intrinsic error; f
36、iducial value See Part 1. 4.2.1 Correspondence between intrinsic error and accuracy class See Part 1. 4.2.2 Fiducial value The fiducial value for an ammeter or a voltmeter corresponds to: 4.2.2.1 The upper limit of the measuring range for the following: instruments with the mechanical and/or electri
37、cal zero at one end of the scale; instruments with the mechanical zero outside the scale irrespective of the position of the electrical zero; instruments with the electrical zero outside the scale irrespective of the position of the mechanical zero. The class index is marked using Symbol E-1 given i
38、n Table III-1 (see Part1, Clause 8). 4.2.2.2 The sum of the electrical values, irrespective of sign, corresponding to the two limits of the measuring range when both the mechanical and the electrical zeros are displaced within the scale. The class index is marked using Symbol E-1 given in Table III-
39、1 (see Part1, Clause 8). 4.2.2.3 The span for an instrument whose scale marks do not correspond directly to its electrical input quantity. The class index is marked using Symbol E-10 given in Table III-1 (see Part1, Clause 8). This sub-clause does not apply to a voltmeter or ammeter designed to be u
40、sed in conjunction with a shunt, a series resistor (impedance) or an instrument transformer. These instruments are to be treated in accordance with Sub-clauses4.2.2.1 or4.2.2.2, as appropriate. 0.05, 0.1, 0.2, 0.3, 0.5, 1, 1.5, 2, 2.5, 3, 5.EN60051-2:1989 6 BSI 01-2000 4.2.2.4 For an instrument whos
41、e scale has been arranged to produce a special arrangement of scale marks, the fiducial value (and therefore the permissible error) shall be as agreed between manufacturer and user. The fiducial value does not have to be the same at all points on the scale. 5 Nominal range of use and variations 5.1
42、Nominal range of use See Part 1 and TableII-2. EN 60051-2:1989 BSI 01-2000 7 Limits of the nominal range of use and permissible variations additional to those given in Table II-1 Influence quantity Limits of the nominal range of use unless otherwise marked Permissible variation expressed as a percen
43、tage of the class index For the recommended tests, see Part9, Sub-clause: Ripple (45 Hz to 65 Hz and 90 Hz to130 Hz) on d.c.measured quantity for other than r.m.s.responding instruments 1) 20% 50% 3.6 Distortion of a.c.measured quantity for other than rectifier instruments 2) Distortion factor Instr
44、uments without electronic devices in their measuring circuits;20% 100% 3.7.1 Peak factor Instruments having electronic devices in their measuring circuits:1 to3 3) 100% Under consideration Frequency of a.c.measured quantity Reference frequency 10% or lower limit of reference range for frequency 10%
45、and upper limit of reference range for frequency+ 10% 100% 3.8.1 Magnetic field of external origin 0.4 kA/m Class indices 0.3 and smaller Class indices 0.5 and greater 3.5 Moving magnet, moving iron and electrodynamic instruments if not astatic and/or not having a magnetic screen 3% of the fiducial
46、value 4) 6% of the fiducial value 4) Ferrodynamic instruments if not astatic and/or not having a magnetic screen 1.5% of the fiducial value 4) 3% of the fiducial value 4) All other instruments 0.75% ofthe fiducial value 4) 1.5% of the fiducial value 4) See notes, page8.EN60051-2:1989 8 BSI 01-2000 N
47、otes for Table II-2 1) For an r.m.s.-responding instrument which also responds to d.c., no permissible variation can be stated because the ripple is then part of the measured quantity. 2) For a.c.quantities, the requirements for instruments relate to r.m.s.values irrespective of the principle of ope
48、ration of the instrument. However, instruments incorporating rectifier(s) (except r.m.s.-responding instruments) usually respond to the rectified (mean) value of the waveform but are scaled to indicate the r.m.s.value of a sinusoidal waveform. If the waveform is not sinusoidal, the indicated value m
49、ay be seriously in error. However, if the waveform can be adequately characterized, this error is calculable. Requirements for the influence of a distorted waveform on rectified (mean) and peak-sensing instruments are therefore not specified. 3) The permissible variation due to a peak factor of other than(corresponding to a sine wave) is included in the permissible variation due to distortion of the measured quantity. For instruments having a peak factor capability greater than3, the manufacturer shall state: a
