1、BRITISH STANDARD BS 89-3:1990 EN 60051-3: 1989 IEC 51-3:1984 Incorporating Amendment No. 1 Direct acting indicating analogue electrical measuring instruments and their accessories Part 3: Specification for special requirements for wattmeters and varmeters This European Standard EN 60051-3 has the st
2、atus of a British Standard UDC 621.317.784.037.33BS89-3:1990 This British Standard was published under the authority of the Board of BSI and comes into effect on 31 August 1990 BSI 09-1999 First published as BS 89 October 1919 Second edition August 1926 Third edition September 1937 Fourth edition Fe
3、bruary 1954 Fifth edition April 1977 Published as BS 89-3 August 1990 The following BSI references relate to the work on this standard: Committee reference PEL/13 Draft for comment 80/23645 DC ISBN 0 580 18435 8 Cooperating organizations The European Committee for Electrotechnical Standardization (C
4、ENELEC), under whose supervision this European 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 UnitedKingdom Amendments issu
5、ed since publication Amd. No. Date of issue Comments 8749 August 1995 Indicated by a sideline in the marginBS89-3:1990 BSI 09-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Foreword 2 Text of EN 60051-3 5 National appendix W Inside back coverBS
6、89-3:1990 ii BSI 09-1999 National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee and is the English language version of EN60051-3 “Direct acting indication analogue electrical measuring instruments and their accesso
7、ries Part 3: Special requirements for wattmeters and varmeters”, including Amendment A1 published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical to the English language version of IEC Publication51-3 published by the International Electrotechnical Commissio
8、n (IEC) as amended by the editorial corrections listed in the technical text source on page 2. For the purposes of this British Standard, any references to the IEC page numbers in the text should be ignored. In1995 the European Committee for Electrotechnical Standardization (CENELEC) accepted Amendm
9、ent 1:1994 to IEC51-3:1984 as amendmentA1:1995 to EN60051-3:1989. This Part of BS89 together with Parts 1, 2, 4, 5, 6, 7, 8 and9 of the standard supersedes BS89:1977, which is withdrawn. BS89 comprises the following Parts, which will be the English language version of the listed European Standards.
10、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 B
11、S 89 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 60051-4 Part 4 Specification for special requirements for frequency meters EN 60051-5 Part 5 Specification for spe
12、cial 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 Specification for special requirements for multi-function instruments EN 60051-8 Part 8 Specific
13、ation 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, pages i and ii, the EN title page, pages2to12, an inside back cover and a back cover. This standard has been updated (see copyright
14、 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 EN 60051-3 November 1989 + A1 January 1995 UDC 621.317.784.037.33 Key words: Electrical measuring instruments; analogue indicatin
15、g instruments; direct acting measuring instruments; accessories for electrical measuring instruments; wattmeters; varmeters English version Direct acting indicating analogue electrical measuring instruments and their accessories Part 3: Special requirements for wattmeters and varmeters (includes ame
16、ndment A1:1995) (IEC 51-3:1984 edition 4) Appareils mesureurs lectriques indicateurs analogiques action directe et leurs accessoires Troisime partie: Prescriptions particulires pour les wattmtres et les varmtres (inclut lamendement A1:1995) (CEI 51-3:1984 dition 4) Direkt wirkende anzeigende elektri
17、sche Megerte und ihr Zubehr Megerte mit Skalenanzeige Teil 3: Spezielle Anforderungen fr wirk- und Blindleistrungs Megerte (enthlt nderungen A1:1995) (IEC 51-3:1984 Ausgabe 4) This European Standard was ratified by CENELEC on 11 September 1989. CENELEC members are bound to comply with the requiremen
18、ts of the 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 standards may be obtained on application to the CENELEC Central S
19、ecretariat 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 notified to CENELEC Central Secretariat has the same sta
20、tus as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for
21、Electrotechnical Standardization Comit 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. EN 60051-3:1989 + A1:1995 EEN60051-3:1989 BSI 09-
22、1999 2 Brief history The text of IEC-Publication51-3 (4th edition 1984) was submitted to the CENELEC members for unique acceptance. Technical text The text of the International Standard IEC51-3 (4th edition 1984) was approved by CENELEC on 11 September 1989 as a European Standard with the following
23、editorial correction to the English version: Table II-3, note 2, 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
24、 Committees having a special interest therein are 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
25、to promote international unification, the IEC expresses 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 shou
26、ld, as far as possible, be clearly indicated in the 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
27、IEC Publication51. This standard constitutes Part 3. 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;
28、Part 4: Special Requirements for Frequency Meters; Part 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
29、Requirements for Accessories; Part 9: Recommended Test 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 additio
30、n, tables, figures and appendices add a suffix to the 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 docu
31、ments: Further information can be found in the Report on Voting indicated in the table above. The following IEC publication is quoted in this standard: Publication No. 185 (1966): Current Transformers. Foreword to Amendment A1 The text of document 85(CO)63, future amendment 1 to IEC51-3:1984, prepar
32、ed by IECTC85, Measuring equipment for electromagnetic quantities, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN60051-3:1989 on1994-10-04 latest date of announcement of the EN at national level (doa): 1990-03-01 date of latest publication of a new h
33、armonized standard (dop): 1990-09-01 date of withdrawal of conflicting national standards (dow): 1990-09-01 Six Months Rule Report on Voting 13B(CO)95 13B(CO)102EN60051-3:1989 BSI 09-1999 3 The following dates were fixed: For products which have complied with EN60051-3:1989 before1995-10-01, as show
34、n by the manufacturer or by a certification body, this previous standard may continue to apply for production until2000-10-01. Contents Page Brief history 2 Foreword 2 Preface 2 1 Scope 5 2 Definitions 5 3 Description, classification and compliance 5 4 Reference conditions and intrinsic errors 5 5 N
35、ominal range of use and variations 6 6 Further electrical and mechanical requirements 9 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 I-3 Reference conditions and tolera
36、nces, additional to those given in Table I-1, for testing purposes 5 Table II-3 Limits of the nominal range of use and permissible variations additional to those given in Table II-1 7 Table IV-3 Overloads of short duration 10 latest date by which the amendment has to be implemented at national level
37、 by publication of an identical national standard or by endorsment (dop) 1994-10-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 1995-10-014 blankEN60051-3:1989 BSI 09-1999 5 1 Scope 1.1 Part 3 of the standard applies to direct acting indicati
38、ng wattmeters and varmeters having an analogue display. NOTEFor multifunction instruments, see Part7. 1.2 This part also applies to non-interchangeable accessories (as defined in Sub-clause 2.1.15.3 of Part 1) used with wattmeters and varmeters. 1.3 to 1.8 See Part 1. 2 Definitions See Part 1. 3 Des
39、cription, classification and compliance 3.1 Description Wattmeters and varmeters shall be described according to their method of operation as given in Sub-clause 2.2 of Part 1. 3.2 Classification Wattmeters and varmeters shall be classified in one of the accuracy classes denoted by the following cla
40、ss indices: 0.05, 0.1, 0.2, 0.3, 0.5, 1, 1.5, 2, 2.5, 3, 5. 3.3 Compliance with the requirements of this standard See Part 1. 4 Reference conditions and intrinsic errors 4.1 Reference conditions 4.1.1 The reference values of the influence quantities shall be as given in Table I-1 and Table I-3. 4.1.
41、2 See Part 1. 4.1.3 Reference conditions different from those given in Table I-1 and Table I-3 may be specified, but they shall then be marked in accordance with Clause 8 of Part 1. Table I-3 Reference conditions and tolerances, additional to those given in Table I-1, fortesting purposes Influence q
42、uantity Reference conditions unless otherwise marked Tolerance permitted for testing purposes, applicable for a single reference value a Voltage component of measured power Rated voltage or any voltage within the reference range, if any 2% of the rated value Current component of the measured power A
43、ny current up to the rated current or up to the upper limit of the reference range, if any Frequency of voltage and current components of the measured power Instruments using phase shifting devices Reference frequency 0,1% of the reference frequency Other instruments 45Hz to 65Hz 2% of the reference
44、 frequency Power factor Cos = 1 or rated cos b 0,01 lagging or leading 0,01 Phase balance (for polyphase instruments) Symmetrical voltages and currents cd a This tolerance applies when a single reference value is specified in this table or is marked by the manufacturer. For a reference range, no tol
45、erance is allowed. b Sin for varmeters. Positive sign for lagging (inductive), negative sign for leading (capacitive). c The difference between any two line-to-line voltages and between any two line-to-neutral voltages shall not exceed1% of the average (line-to-line and line-to-neutral voltages, res
46、pectively). Each of the currents in the phases shall differ by not more than1% from the average of the currents. The angles between each of the currents and the corresponding phase-to-neutral voltages shall differ by not more than 2 . d Single-phase testing of polyphase instruments if acceptable if
47、permitted by the manufacturer.EN60051-3:1989 6 BSI 09-1999 4.2 Limits of intrinsic error; fiducial 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 a wattmeter or varmeter corresponds to: 4.2.2.1 The upper limit
48、 of the measuring range for the following: instruments with the mechanical and/or electrical 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 o
49、f the position of the mechanical zero. The class index is marked using Symbol E-1 given in Table III-1 (see Clause8 of Part1). 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-1 (see Clause8 of Part1). 4.2.2.3 The span for an instrument whose scale marks do not correspond dire
