BS EN 60127-5-1991 Miniature fuses - Guide for the quality assessment of miniature fuse-links《微型熔断器 微型熔丝链质量评定指南》.pdf

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1、BRITISH STANDARD BS EN 60127-5:1991 Miniature fuses Part5: Guide for the quality assessment of miniature fuse-links This European Standard EN60127-5:1991 has the status of a BritishStandardBSEN60127-5:1991 This British Standard was published under the authority ofthe Standards Board and comesinto ef

2、fect on 30 August1991 BSI06-1999 The following BSI references relate to the work on this standard: Committee reference PEL/78 Draft for comment 86/22170 DC ISBN 0 580 19819 7 Cooperating organizations The European Committee for Standardization, under whose supervision this European Standard was prep

3、ared, comprises the national standards organizations of the following Western European countries. Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Da

4、te CommentsBSEN60127-5:1991 BSI 06-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN60127-5 3 National appendix NA (informative) Deletions from IECPublication127-5:1998 6 National appendix NB (informative) 6 National appendix NC (informative

5、) Inside back coverBSEN60127-5:1991 ii BSI 06-1999 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 EN60127-5 “Miniature fuses Part5: Guidelines for quality assessment o

6、f miniature fuse-links” which endorses IEC127-5:1988 “Miniature fuses Part5: Guidelines for quality assessment of miniature fuse-links” published by the International Electrotechnical Commission (IEC). This British Standard is one of a series. Together the standards supersede BS4265 which is withdra

7、wn. The new standards are as follows. BS EN60127-1, Definitions for miniature fuses and general requirements for miniature fuse-links. BS EN60127-2, Specification for cartridge fuse-links. BS EN60127-3, Specification for sub-miniature fuse-links. BS EN60127-5, Guide for the quality assessment of min

8、iature fuse links. It is anticipated that when IEC127-4 and IEC127-6 are published they will be approved by CENELEC as EN60127-4 and EN60127-6 respectively. IEC127-4 TTD:1989 is identical with DD183:1989 “Specification for universal modular fuses”. The foreword and preface of IEC127-5:1988 which do

9、not form part of the text of EN60127-5 have been quoted in National appendix NA. Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. National appendices are designated “informative”. For the purposes of this British St

10、andard, any references to IEC page numbers in the text should be ignored. Cross-references. Details of international standards quoted in this British Standard for which there is an identical or technically equivalent British Standard are given in National appendix NC. A British Standard does not pur

11、port 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. Summary of pages This document comprises a front cover, an inside front

12、cover, pagesi andii, theEN title page, pages2 to6, an 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

13、 NORM EN60127-5 April1991 UDC 621.316.923-18:658.562 Supersedes HD109.5 S1:1989 Descriptors: Miniature fuse, quality assessment, type test, lot-by-lot inspection, acceptance criteria English version Miniature fuses Part5: Guidelines for quality assessment of miniature fuse-links (IEC127-5:1988) Coup

14、e-circuit miniatures Cinquime partie: Directives pour lvaluation de la qualit des lments de remplacement miniatures (CEI127-5:1988) Gerteschutzsicherungen Teil5: Leitlinien fr die Gtebesttigung von G-Sicherungseinstzen (IEC127-5:1988) This European Standard was approved by CENELEC on15 March1991. CE

15、NELEC 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 standards may be obtained on

16、 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 notified to the Central Sec

17、retariat has the same status 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 United Kingdom. CENEL

18、EC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1990 Copyright reserved to CENELEC members Ref. No. EN 60127-5:1991 EEN60127-5:1991 BSI

19、 06-1999 2 Foreword The CENELEC questionnaire procedure, performed for finding out whether or not the International Standard IEC127-5:1988 could be accepted without textual changes, has shown that no CENELEC common modifications were necessary for the acceptance as European Standard. The reference d

20、ocument was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN60127-5 on15 March1991. The following dates were fixed: For products which have complied with HD109.5 S1:1989 before1992-03-01, as shown by the manufacturer or by a certification body, this previous standar

21、d may continue to apply for production until1997-03-01. Endorsement notice The text of the International Standard IEC127-5:1988 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Object 3 3 Reference documents 3 4 Lot-by-lot i

22、nspection 3 5 Reliability and life tests (under consideration) 4 6 Periodic inspection 5 Table I Primary characteristics (inspection level II) (Samples may be returned to the lot after inspection) 4 Table II Time/current characteristic (IEC127-1, Sub-clause9.2.1) (Inspection level S4, destructive te

23、st) 4 Table III 5 latest date of publication of an identical national standard (dop)1992-03-01 latest date of withdrawal of conflicting national standards (dow)1992-03-01EN60127-5:1991 BSI 06-1999 3 Introduction According to the wish expressed by the users of miniature fuses all standards, recommend

24、ations and other documents relating to miniature fuses should have the same publication number in order to facilitate reference to fuses in other specifications, for example, equipment specifications. Furthermore, a single publication number and subdivision into parts would facilitate the establishm

25、ent of new standards, because clauses containing general requirements need not be repeated. The new IEC127 series is thus subdivided as follows: IEC127, Miniature fuses (general title). IEC127-1, Part1: Definitions for miniature fuses and general requirements for miniature fuse-links. IEC127-2, Part

26、2: Cartridge fuse-links. IEC127-3, Part3: Sub-miniature fuse-links. IEC127-4, Part4: Universal modular fuse-links. IEC127-5, Part5: Guidelines for quality assessment of miniature fuse-links. IEC127-6, Part6: Fuse-holders. (until now IEC257) IEC127-7, (Free for further documents.) IEC127-8, (Free for

27、 further documents.) IEC127-9, Part9: Test-holders and test-circuits. IEC127-10, Part10: User guide. 1 Scope This standard gives a guide for tests for assessing the quality of miniature fuse-links other than type tests, for the case where there is no complete agreement between the user and the manuf

28、acturer on what such tests should be. 2 Object To provide guidelines and limits generally acceptable for quality control purposes by large scale users and manufacturers of miniature fuse-links. This standard has validity for large scale series with lot sizes of10000 and more. It is also applicable f

29、or smaller lot sizes, if necessary. Periodic inspections by reduced type tests (Clause6) are intended to be carried out periodically in order to ensure that the level of technical performance previously verified by complete type tests as given in subsequent parts of IEC127 is maintained. The frequen

30、cy of periodic inspections in relation to lot-by-lot inspections is not established in this standard. 3 Reference documents IEC127, Miniature fuses. IEC127-1:1988, Definitions for miniature fuses and general requirements for miniature fuse-links. IEC127-2, Cartridge fuse-links. (In preparation.) IEC

31、127-3:1988, Sub-miniature fuse-links. IEC127-4, Universal modular fuse-links. (Under consideration.) IEC410:1973, Sampling plans and procedures for inspection by attributes. IEC419:1973, Guide for the inclusion of lot-by-lot and periodic inspection procedures in specifications for electronic compone

32、nts (or parts). IEC Guide102:1979, Specification structures for the quality assessment of electronic components. 4 Lot-by-lot inspection 4.1 Test conditions The sample appropriate to the acceptable quality level (AQL) and the inspection level shall be as designated in IEC410.EN60127-5:1991 4 BSI 06-

33、1999 4.2 Non-destructive tests Table I Primary characteristics (inspection levelII) (Samples may be returned to the lot after inspection) 4.3 Destructive tests Table II Time/current characteristic (IEC127-1, Sub-clause9.2.1 (Inspection level S4, destructive test) 4.4 Acceptance criteria A batch of m

34、iniature fuse-links made in accordance with IEC127 will be considered as having an acceptable quality level, if the tests specified in Table I and Table II are performed in the order indicated and the number of defects found does not exceed the acceptance number given in the relevant sampling plan.

35、NOTEAcceptance tests requiring lower AQL limits than are given above should be subject to special agreement between the user and the manufacturer. 5 Reliability and life tests (Under consideration.) Category Test Classification of defects AQL Sub-clause of IEC127-1 Major Minor Each defect Total/Cate

36、gory Marking Fuse-links Colour codes 6.1 6.4 0.25 Mechanical Terminations a 8.3 Alignment 8.4 Dimensions 8.1 0.25 0.65 Cracked insulation (visible) Electrical continuity Cold resistance b 0.25 NOTEIf defective units are found in any category which will also result in a defective status in another ca

37、tegory, these units will be replaced by new units. This procedure should be applied only when the AQL in that category has not been exceeded. a Without being immersed in water. b Limiting values given by the manufacturer and based upon voltage drop measured in accordance with Sub-clause 9.1 of IEC12

38、7-1 but with a current not greater than10% of the rated current of the fuse. Fraction in percentage of z, at multiple of I n AQL 1.0 I nor 1.5 I n a 2.0 I nor 2.1 I n 2.75 I n 4 I n 10 I n 10 40 30 10 10 0.65 NOTE 1Any failed fuses found in testing to Table I should be replaced by good units, before

39、 continuing with sampling and testing to Table II. NOTE 2When an acceptance number other than zero is indicated in the sampling plan, and any fuse-links fail to operate at2.1 I nwithin the maximum time indicated on the relevant Standard Sheet, the test current should be increased without interruptio

40、n to2.2 I nas follows: For fuse-links having a melting time of maximum30min at2.1 I nfor an additional10min. For fuse-links having a melting time of maximum2min at2.1 I nfor an additional2min. For fuse-links having a melting time of maximum5s at2.0 I nfor an additional5s. If any fuse-link fails to o

41、perate within this additional time, the lot should be deemed to be unacceptable, regardless of the acceptance number indicated in the sampling plan. z=sample sizes according to sampling plan. a Modified endurance test according to Items b) and c) of Sub-clause9.4 of IEC127-1.EN60127-5:1991 BSI 06-19

42、99 5 6 Periodic inspection 6.1 Reduced type tests Table III Description Sub-clause of IEC127-1 Sample number in decreasing values of voltage drop 16 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 30 Marking 6.1 Dimensions Alignment 8.1 8.4 Voltage drop 9.1 Time/current characteristic 2.1 I n

43、4.0 I n 9.21 Endurance test and maximum sustained dissipation 9.4, items b) and c) Breaking capacity tests Rated breaking capacity 10 I nor50 I n (see Note1) 9.3 NOTE 1Ratings32mA to125mA to be tested at50 I n . Ratings160mA to6.3A to be tested at10 I n . NOTE 2Where failures occur, tests should be

44、repeated as specified in Sub-clause7.2.3 of IEC127-1.BSEN60127-5:1991 6 BSI 06-1999 National appendix NA (informative) Deletions from IEC Publication127-5:1988 Foreword The foreword has been deleted. It read as follows. 1) The formal decisions or agreements of the IEC on technical matters, prepared

45、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 and they are accepted by th

46、e 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 divergence between the IEC recomme

47、ndation and the corresponding national rules should, as far as possible, be clearly indicated in the latter. 4) The IEC has not laid down any procedure concerning marking as an indication of approval and has no responsibility when an item of equipment is declared to comply with one of its recommenda

48、tions. Preface The preface has been deleted. It read as follows. This standard has been prepared by Sub-Committee32C: Miniature Fuses, of IEC Technical Committee No.32: Fuses. It forms Part5 of IEC127. The text of this standard is based on the following documents: Full information on the voting for

49、the approval of this standard can be found in the Voting Report indicated in the above table. National appendix NB (informative) The United Kingdom participation in the preparation of this European Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to Technical Committee PEL/78, upon which the following bodies were represented: ASTA Certification Services ERA Technology Ltd. Electrical Installation Equip