1、BRITISH STANDARD BS 89-4:1990 EN 60051-4: 1989 IEC 51-4:1984 Direct acting indicating analogue electrical measuring instruments and their accessories Part 4: Specification for special requirements for frequency meters This European Standard EN 60051-4 has the status of a British Standard UDC: 621.31
2、7.76.037.33BS89-4:1990 This British Standard was published under the authority of the Board of BSI and comes into effect on 31 August 1990 BSI 07-1999 First published, as BS 89, October1919 Second edition August 1926 Third edition September 1937 Fourth edition February 1954 Fifth edition April 1977
3、Published as, BS 89-4, August1990 The following BSI references relate to the work on this standard: Committee reference PEL/13 Draft for comment 88/33509 DC ISBN 0 580 18444 7 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision thi
4、s 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 United Kingdom Amendments issued since publication Amd. No. Date
5、of issue CommentsBS89-4:1990 BSI 07-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 60051-4 5 National appendix W 8BS89-4:1990 ii BSI 07-1999 National foreword This British Standard has been prepared under the direction of the Power Electr
6、ical Engineering Standards Policy Committee and is the English language version of EN60051-4 “Direct acting indicating analogue electrical measuring instruments and their accessories Part 4: Special requirements for frequency meters”, published by the European Committee for Electrotechnical Standard
7、ization (CENELEC). It is identical with the English language version of IEC Publication 51-4 published by the International Electrotechnical Commission (IEC). This Part of BS89 together with Parts 1, 2, 3, 5, 6, 7, 8 and 9 of this standard supersedes BS89:1977, which is withdrawn. BS89 comprises the
8、 following parts, which will be the English language version of the listed European Standards. 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
9、not of itself confer immunity from legal obligations. European Standard Corresponding Part of BS 89 EN 60051-1 Part 1 Specification for definitions and general requirements common to all Parts EN 60051-2 Part 2 Specification for requirements for ammeters and voltmeters EN 60051-3 Part 3 Specificatio
10、n for special requirements for wattmeters and varmeters 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 (impedence meters) and conductance meters EN 60051-7 Part 7 S
11、pecification 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, pages i and ii, theEN title page, pa
12、ges 2 to 8 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 EN 60051-4 November 1989 UDC: 621.317.76.037.33 Key wor
13、ds: Electrical measuring instruments;analogue indicating instruments; direct acting measuring instruments; accessories for electrical measuring instruments; frequency meters English version Direct acting indicating analogue electrical measuringinstruments and their accessories Part4:Specialrequireme
14、nts for frequency meters (IEC 51-4 (1984) edition 4) Appareils mesureurs lectriques indicateurs analogiques action directe et leurs accessoires Quatrime partie: Prescriptions particulires pour les frquencemtres (CEI 51-4 (1984) dition 4) Direkt wirkende anzeigende elektrische Megerte und ihr Zubehr
15、Megerte mit Skalenanzeige Teil 4: Spezielle Anforderungen fr Frequenz-Megerte (IEC 51-4(1984)Ausgabe 4) This European Standard was ratified by CENELEC on 11 September 1989. CENELEC members are bound to comply with the requirements of the CENELEC Internal Regulations which stipulate the conditions fo
16、r 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. This European Standard exists in th
17、ree 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 offical versions. CENELEC members are the national electro
18、technical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electr
19、otechnique 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 60051-4:1989 EEN60051-4:1989 BSI 07-1999 2 Brief history The text of IEC-Publication 51-4 (4th edition 1984) was sub
20、mitted to the CENELEC members for unique acceptance. Technical text The text of the International Standard IEC 51-4 (4th edition 1984) was approved by CENELEC on11 September 1989 as a European Standard. The following dates are applicable: Foreword 1) The formal decisions or agreements of the IEC on
21、technical matters, prepared by Technical Committees on which all the National 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
22、 and they are accepted by the National Committees in that sense. 3) In order 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 diverg
23、ence between the IEC recommendation and the corresponding national rules should, 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 (former Sub-Committee 13B: Electrica
24、l Measuring Instruments). This fourth edition replaces the third edition of IECPublication 51. This standard constitutes Part 4. The general layout for the revised Publication 51 is as follows: Part 1: Definitions and General Requirements Common to all Parts; Part 2: Special Requirements for Ammeter
25、s and Voltmeters; Part 3: Special Requirements for Wattmeters and Varmeters; 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;
26、Part 7: Special Requirements for Multi-function Instruments; Part 8: Special Requirements for Accessories; Part 9: Recommended Test Methods. Parts 2 to 9 are not complete in themselves and shall be read in conjunction with Part 1. All of these parts are arranged in the same format and a standard rel
27、ationship between subject and clause number is maintained throughout. In addition, 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 Publication 51 to distinguish information relating to the different
28、 types of instruments. The text of this standard is based upon the following documents: Further information can be found in the Report on Voting indicated in the table above. latest date of announcement ofthe EN at national level (doa): 1990-03-01 date of latest publication of a new harmonized stand
29、ard (dop): 1990-09-01 date of withdrawal of conflicting national standards (dow): 1990-09-01 Six Months Rule Report on Voting 13B(CO)87 13B(CO)96EN60051-4:1989 BSI 07-1999 3 Contents Page Brief history 2 Foreword 2 1 Scope 5 2 Definitions 5 3 Description, classification and compliance 5 4 Reference
30、conditions and intrinsic errors 5 5 Nominal range of use and variations 5 6 Further electrical and mechanical requirements 6 7 Constructional reauirements 7 8 Information, general markings and symbols 7 9 Markings and symbols for terminals 7 10 Tests to prove compliance with this standard 7 Table I-
31、4 Reference condition andtolerance,additional to those giveninTable I-1, for testing purposes 5 Table II-4 Limits of the nominal rangeofuseandpermissible variations additionalto those given in Table II-1 6 Table IV-4 Overloads of short durationforfrequency meters 74 blankEN60051-4:1989 BSI 07-1999 5
32、 1 Scope 1.1 Part 4 of the standard applies to direct acting indicating analogue frequency meters. 1.2 This part also applies to non-interchangeable accessories (as defined in Sub-clause 2.1.15.3 of Part 1) used with frequency meters. 1.3 This sub-clause of Part 1 does not apply to frequency meters.
33、 1.4 to 1.8 See Part 1. 2 Definitions See Part 1. 3 Description, classification and compliance 3.1 Description Frequency meters shall be described as: 3.1.1 Pointer-type frequency meters, or 3.1.2 Vibrating-reed frequency meters. 3.2 Classification Frequency meters shall be classified in one of the
34、accuracy classes denoted by the following class indices: 0.05, 0.1, 0.15, 0.2, 0.3, 0.5, 1, 1.5, 2,2.5, 5. 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 and Table I-4. 4.2 Limits of intrinsic error; f
35、iducial value See Part 1. 4.2.1 See Part 1. 4.2.2 Fiducial value For frequency meters, the class index is marked using Symbol E-1 given in Table III-1 (see Part 1, Clause 8). The fiducial value for a frequency meter corresponds to: 4.2.2.1 The upper limit of the measuring range. 4.2.2.2 For vibratin
36、g-reed frequency meters which have several rows of reeds, each row is considered to be a separate range and each row has its own fiducial value which is the upper limit of the measuring range of that row. 4.2.3 Special requirements for vibrating reed frequency meters For vibrating reed frequency met
37、ers, the following shall also apply: 4.2.3.1 The difference between the nominal frequencies of two adjacent reeds shall not exceed twice the limit of the permissible intrinsic error. 4.2.3.2 With a uniform rate of change of frequency, reeds shall reach their maximum amplitudes of vibration in the se
38、quence implied by their nominal frequencies. 4.2.3.3 The error is taken as the greatest value of the frequency differences: between the nominal frequency for each reed and the frequency at which that reed has its maximum amplitude of vibration, or between the mean of the nominal frequencies of any t
39、wo adjacent reeds and the frequency at which these reeds have the same amplitude of vibration. 5 Nominal range of use and variations 5.1 Nominal range of use See Part 1 and Table II-4. Table I-4 Reference condition and tolerance, additional to those given in Table I-1, fortestingpurposes Influence q
40、uantity Reference condition unlessotherwisemarked Tolerance permitted fortestingpurposes a Voltage of a.c. measured quantity Rated voltage or any voltage within the reference range (ifany) 2% of the rated value a For a reference range, no tolerance is allowed.EN60051-4:1989 6 BSI 07-1999 Table II-4
41、Limits of the nominal range of use and permissible variations additional to thosegiven in Table II-1 5.2 Limits of variations See Part 1. 5.3 Conditions for determination of variations See Part 1. 6 Further electrical and mechanical requirements 6.1 Voltage tests, insulation tests and other safety r
42、equirements See Part 1. 6.2 Damping See Part 1. However, the requirements of Part 1 do not apply to vibrating-reed frequency meters. Also, for pointer-type frequency meters only, the requirements of Sub-clauses 6.2.1 and 6.2.2 of Part1 apply. 6.3 Self-heating See Part 1. 6.4 Permissible overloads 6.
43、4.1 Continuous overload For the recommended test, see Part 9, Sub-clause4.6. Frequency meters, together with their non-interchangeable accessory(ies), if any, except for instruments fitted with a non-locking switch, shall be subjected to a continuous voltage overload of 120% of the rated voltage or
44、120% of the upper limit of the reference range for a period of2h. After having cooled to its reference temperature, the frequency meter, together with its non-interchangeable accessory(ies), if any, shall comply with its accuracy requirements, however, the overload shall not be repeated. The continu
45、ous overload test shall be carried out under reference conditions, except for the voltage, at any frequency within the measuring range. 6.4.2 Overloads of short duration For the recommended tests, see Part 9, Sub-clause4.4. Frequency meters together with their non-interchangeable accessory(ies), if
46、any, shall be subjected to voltage overloads of short duration. 6.4.2.1 The values of voltage for the overloads of short duration shall be the product of the relevant factor given in Table IV-4 and the value of the rated voltage or the upper limit of the reference range for voltage, unless other val
47、ues are stated by the manufacturer. 6.4.2.2 The full duration of each overload shall be applied except when an automatic cut-out (fuse) fitted to the instrument has interrupted the circuit in less than the time specified in Table IV-4. The automatic cut-out shall be reset (or the fuse replaced) befo
48、re the application of the next overload. 6.4.2.3 After having been subjected to the overloads of short duration and after having cooled to the reference temperature, the frequency meter together with its non-interchangeable accessory(ies), if any, shall comply with its accuracy requirements; however
49、, the overloads shall not be repeated. 6.5 Limiting values of temperature See Part 1. 6.6 Deviation from zero (Not applicable to vibrating reed frequency meters.) For the recommended test, see Part 9, Sub-clause 4.9. 6.6.1 If a frequency meter has a setting mark (zero scale mark) on the scale, it shall be tested for return to that mark when de-energized. The test shall be carried out under reference conditions. Influence quantity Limits of the nominal range of use unless otherwise marked Permissible variatio
