BS EN 60127-10-2002 Miniature fuses - User guide for miniature fuses《小型熔断器 小型熔断器的用户指南》.pdf

1、BRITISH STANDARD BS EN 60127-10:2002 IEC 60127-10:2001 Miniature fuses Part 10: User guide for miniature fuses The European Standard EN 60127-10:2002 has the status of a British Standard ICS 29.120.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 60127-10:2002 This Brit

2、ish Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 22 March 2002 BSI 22 March 2002 ISBN 0 580 39232 5 National foreword This British Standard is the o

3、fficial English language version of EN 60127-10:2002. It is identical to IEC 60127-10:2001. The UK participation in its preparation was entrusted to Technical Committee PEL/32, Fuses, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to

4、 its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both syste

5、ms. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publicatio

6、ns may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of Bri

7、tish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or propos

8、als for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover. The BSI copyright date displaye

9、d in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60127-10 NORME EUROPENNE EUROPISCHE NORM January 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrot

10、echnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60127-10:2002 E ICS 29.120.50 English version Miniature fuse

11、s Part 10: User guide for miniature fuses (IEC 60127-10:2001) Coupe-circuit miniatures Part 10: Guide dutilisation pour coupe-circuit miniatures (CEI 60127-10:2001) Gerteschutzsicherungen Teil 10: Leitfaden fr die Anwendung von Gerteschutzsicherungen (IEC 60127-10:2001) This European Standard was ap

12、proved by CENELEC on 2002-02-01. 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 na

13、tional standards 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 langu

14、age and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Port

15、ugal, Spain, Sweden, Switzerland and United Kingdom.Foreword The text of document 32C/294/FDIS, future edition 1 of IEC 60127-10, prepared by SC 32C, Miniature fuses, of IEC TC 32, Fuses, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60127-10 on 2002-02-01. The fol

16、lowing dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-02-01 Annexes designate

17、d “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60127-10:2001 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6012710:20

18、02 BSI22March2002CONTENTS INTRODUCTION 3 1 Scope 5 2 Normative references. 5 3 Properties of miniature fuses . 6 4 Different types of fuse-links . 6 4.1 Characteristics 7 4.2 Breaking capacity 7 4.3 Cartridge fuse-links (IEC 60127-2) 7 4.4 Sub-miniature fuse-links (IEC 60127-3) . 8 4.5 Universal Mod

19、ular Fuse-links (IEC 60127-4) 9 5 Applications. 9 5.1 Applications Fuse selection criteria. 9 5.2 Electrical criteria 10 5.3 Mechanical/physical dimensions.10 6P r o t e c t i o n b y I t limitation and pulse operation .10 6.1 I t value 10 6.2 Pulse operation .11 6.3 I 2 t limitation.11 7 Direct cur

20、rent (d.c.) applications .11 7.1 General information11 7.2 Battery circuits .12 7.3 Inductive load circuits.12 8 Fuse-holders.12 8.1 Features.12 8.2 Safety aspects12 8.3 Selection of a fuse-holder.12 8.4 Exchange of fuse-links under load13 9 Performance on extra-low voltages .13 10 Influence of ambi

21、ent temperature14 Bibliography16 Annex ZA (normative) Normative references to international publications with their corresponding European publications .17 Page3 EN6012710:2002 BSI22March2002INTRODUCTION The users of miniature fuses express the wish that all standards, recommendations and other docu

22、ments 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 establishment of new standards,

23、 because clauses and subclauses containing general require- ments need not be repeated. The new IEC 60127 series is thus subdivided as follows: IEC 60127, Miniature fuses (general title) Part 1: Definitions for miniature fuses and general requirements for miniature fuse-links Part 2: Cartridge fuse-

24、links Part 3: Sub-miniature fuse-links Part 4: Universal Modular Fuse-links (UMF) Part 5: Guidelines for quality assessment of miniature fuse-links Part 6: Fuse-holders for miniature cartridge fuse-links Part 7: (Free for further documents) Part 8: (Free for further documents) Part 9: (Free for furt

25、her documents) Part 10: User guide for miniature fuses Page4 EN6012710:2002 BSI22March2002MINIATURE FUSES Part 10: User guide for miniature fuses 1 Scope This part of IEC 60127 relates to miniature fuses for the protection of electric appliances, electronic equipment and component parts thereof, nor

26、mally intended to be used indoors, as specified in IEC 60127-2, 60127-3 and 60127-4. This standard does not apply to fuses for appliances intended to be used under special conditions, such as in a corrosive or explosive atmosphere. It relates to fuse-holders for miniature fuse-links according to IEC

27、 60127-6. The object of this guide is to introduce the user to the important properties of miniature fuse- links and fuse-holders for miniature fuses-links and to give some guidance on applying them. NOTE 1 If the performance of IEC 60127 fuses proves inadequate, refer to IEC 60269. NOTE 2 Fuse-link

28、s of the same type and rating may, due to differences in design, have different voltage drops and different behaviours. Therefore, in practice, they may not be interchangeable when used in applications with low-circuit voltages, especially in combination with fuse-links of lower rated currents. NOTE

29、 3 Contact the manufacturer for further information. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60127. For dated references, subsequent amend- ments to, or revisions of, any of these pub

30、lications do not apply. However, parties to agreements based on this part of IEC 60127 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to appli

31、es. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60127-2:1989, Miniature fuses Part 2: Cartridge fuse-links IEC 60127-3:1988, Miniature fuses Part 3: Sub-miniature fuse-links IEC 60127-4:1996, Miniatures fuses Part 4: Universal Modular Fuse-links (UMF) IE

32、C 60127-6:1994, Miniature fuses Part 6: Fuse-holders for miniature cartridge fuse-links IEC 60269 (all parts), Low-voltage fuses Page5 EN6012710:2002 BSI22March20023 Properties of miniature fuses The miniature fuse provides protection against the effects of short circuits and sustained overloads, pr

33、otecting components and conductors upstream of the fault and isolating the faulty branch of the circuit downstream of the fault. The opening of the fuse-link also acts as a diagnostic tool, helping to identify the location of the fault. These properties include: Wide range of physical types of const

34、ruction: miniature fuses are available in a wide choice of physical constructions. For example, there are fuse-links that can be fitted into clips and fuse-holders or plugged into sockets enabling easy replacement. There are also types which can be soldered on to printed wiring boards by through-hol

35、e mounting or surface mounting, using wave soldering or reflow soldering. Low cost and very small dimensions: miniature fuses provide very good circuit protection in a small package suitable for miniaturized equipment. Wide range of characteristics: miniature fuses are generally used within electron

36、ic equipment, where prospective short-circuit currents are below 1 500 A. Fuses are available with a very wide range of characteristics, from (very) quick acting types to (long) time-lag types. The latter types are very useful because they can withstand inrush currents experienced during switching o

37、n, but will also open under sustained overloads. Discrimination (selectivity): standardized fuse characteristics and limitation of let- through energy ensure that a faulty circuit is isolated by the fuse without opening higher rated upstream fuses, avoiding disconnection of the supply to healthy cir

38、cuits downstream. Reliability: miniature fuses carry operational currents continuously without any substantial change or deterioration in their characteristics, and give equal protection to that provided by a new fuse. During their long life, no maintenance is required. Tamper-proof reproducible cha

39、racteristics: miniature fuses provide a package of protection tailor-made for the application. The same level of protection is then maintained by a replacement fuse-link of the same type and rating, fitted after the fault has been corrected. The extensive schedule of tests in the IEC 60127 series to

40、gether with a quality system such as that described in IEC 60127-5 and a follow-up service by a National Certification Body, ensure that all aspects of fuse operation are accurately and safely reproduced at any location world-wide. Arc dissipation: suitable fuses can disconnect faults so quickly tha

41、t there is no time for an arc to become established at the fault location. 4 Different types of fuse-links IEC 60127 makes reference to three families of fuse-links: IEC 60127-2 Cartridge fuse-links IEC 60127-3 Sub-miniature fuse-links IEC 60127-4 Universal Modular Fuse-links (UMF) Page6 EN6012710:2

42、002 BSI22March20024.1 Characteristics These are terms that define how quickly a fuse-link will operate (open) at various overload current levels. Fuses conforming to the standard sheets in the various parts of IEC 60127 are characterized as follows: FF Very quick acting FQ u i c k a c t i n g M Medi

43、um time-lag TT i m e - l a g TT Long time-lag The individual standard sheets specify precise time gates for each overload current level, given as a multiple of the rated current. The fuse-element must melt within the given time gate. It should be noted that the characteristics of fuses conforming to

44、 other standards, such as CSA-C22.2 No. 248.14 UL 248-14 1 1 , could be quite different from the IEC 60127 characteristics. Additionally, these other standards may not specify the same characteristic definitions or precise time gates. Accordingly, the definition of terms such as very fast acting, fa

45、st acting, quick acting, normal acting, medium acting, medium blow, time lag, time delay and others are left to the individual fuse manufacturers, and can vary widely. 4.2 Breaking capacity The breaking capacity of a fuse is the value of current that a fuse can safely interrupt at its rated voltage.

46、 The value assigned by the fuse manufacturer is usually that prescribed in the standard sheet, for a given voltage and other specified test conditions such as circuit power factor, closing angle, etc. In practice, a fuse shall not be used in a circuit that has a potential fault (short-circuit) curre

47、nt greater than the rated breaking capacity of the fuse. It is usually difficult to determine the actual maximum potential fault current of a circuit/application. Often it is an assumed theoretical value assigned by a safety agency. In some cases, the suitability of a fuses breaking capacity is dete

48、rmined by testing the fuse in the end product, under short-circuit conditions. 4.3 Cartridge fuse-links (IEC 60127-2) Two sizes of fuse-links are described: 5 mm 20 mm and 6,3 mm 32 mm. The details are specified in six standard sheets. The rated voltage is 250 V a.c. except for those fuse-links show

49、n in standard sheet 4, which are rated 250 V for 50 mA through 2 A; 150 V for 2,5 A through 4 A and 60 V for 6,3 A through 10 A. 1References in square brackets refer to the bibliography. Page7 EN6012710:2002 BSI22March2002Standard sheet Dimensions mm Characteristic Rated breaking capacity 1 5 20 F High (1 500 A) 2 5 20 F Low (35 A or 10 I N)* 3 5 20 T Low (35 A or 10 I N)* 4 6,3 32 F Low (35 A or 10 I N)* 5 5 20 T High