1、BRITISH STANDARD Miniature fuses Part 10: User guide for miniature fuses The European Standard EN 60127-10:2002 has the status ofa British Standard ICs 29.120.50 BS EN 60 127-1 012002 IEC 60 127-10:2001 Wk present to the responsible international/European committee any enquiries on the interpretatio
2、n, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have t
3、he number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period oftime during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cr oss-r e fer enc e s Attention is drawn to the fact that CE
4、N 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 publications may be found in the BSI Standards Catalogue under the se
5、ction entitled ?Tnternational 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 British Standards are responsible for their correct applicatio
6、n. 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 cover, the EN title page, pages 2 to 17 and a back cover. The BSI copyright date displayed in this document indicates when the docu
7、ment was last issued. O BSI 22 March 2002 ISBN O 580 39232 5 EUROPEAN STANDARD EN 601 27-1 O NORME EUROPENNE EUROPISCHE NORM Januaw 2002 ICs 29.120.50 English version Miniature fuses Part IO: User guide for miniature fuses (IEC 601 27-1 0:2001) Coupe-circuit min iatures Part 1 O: Guide dutilisation
8、pour coupe-circuit min iatures (CE1 60127-1 0:2001) Gertesch utzsicheru ngen Teil IO: Leitaden fr die Anwendung von Gertes ch u tzs i c h eru n g e n (IEC 60127-10:2001) This European Standard was approved by CENELEC on 2002-02-01. CENELEC members are bound to comply with the CENKENELEC Internal Reg
9、ulations 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 Central Secretariat or to any CENELEC member. T
10、his 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 Secretariat has the same status as the official versions. CENELEC memb
11、ers are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical S
12、tandardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels O 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 6012
13、7-10:2002 E Page 2 EN 60127-10:2002 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 following dates wer
14、e fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement - latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designated “normative“ are part of the body of the stan
15、dard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. (dop) 2002-1 1-01 (dow) 2005-02-01 Endorsement not i ce The text of the International Standard IEC 60127-10:2001 was approved by CENELEC as a European Standard without any modification. O BSI 22 March 2002 Page 3 EN 6
16、0127-10:2002 CONTENTS INTRODUCTION . 1 Scope . 2 Normative references . 3 Properties of miniature fuses . 6 4 Different types of fuse-links 6 4.1 Characteristics 7 . 4.4 Sub-miniature fuse-links (IEC 60127-3) 4.5 Universal Modular Fuse-links (IEC 60127-4). . 8 . 9 . 9 5 Applications 5.1 Applications
17、 - Fuse selection criteria . 5.2 Electrical criteria . 5.3 Mechan ica l/p h ysical dimensions . . 6. 1 I f value 2 6.2 Pulse operation . I1 7 Direct current (d.c.) applications . 11 I1 2 6 . 3 I f limitation . 7.1 General information 7.2 Battery circuits 7.3 Inductive load circuits . 12 8 Fuse-holde
18、rs . 12 . 12 8.1 Features . 8.2 Safety aspects 8.3 Selection of a fuse-holder 8.4 Exchange of fuse-links under load 9 Performance on extra-low voltages . 13 10 Influence of ambient temperature 14 Bibliography Annex ZA (normati O BSI 22 March 2002 Page 4 EN 60127-10:2002 INTRODUCTION The users of min
19、iature fuses express the wish that all standards, recommendations 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
20、 and subdivision into parts would facilitate the establishment of new standards, because clauses and subclauses containing general require- ments need not be repeated. The new IEC 60127 series is thus subdivided as follows: IEC 60127, Miniafure fuses (general title) Parf 1: Definifions for miniafure
21、 fuses and general requiremenfs for miniafure fuse-links Parf 2: Carfridge fuse-links Parf 3: Sub-miniafure fuse-links Parf 4: Universal Modular Fuse-links (UMF) Parf 5: Guidelines for qualify assessmenf of miniafure fuse-links Parf 6: Fuse-holders for miniafure carfridge fuse-links Parf 7: (Free fo
22、r further documents) Parf 8: (Free for further documents) Parf 9: (Free for further documents) Parf IO: User guide for miniafure fuses O BSI 22 March 2002 Page 5 EN 60127-10:2002 MINIATURE FUSES - Part IO: User guide for miniature fuses 1 Scope This part of IEC 60127 relates to miniature fuses for t
23、he protection of electric appliances, electronic equipment and component parts thereof, normally 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
24、 explosive atmosphere. It relates to fuse-holders for miniature fuse-links according to IEC 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
25、 the performance of IEC 60127 fuses proves inadequate, refer to IEC 60269 NOTE 2 Fuse-links 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
26、-circuit voltages, especially in combination with fuse-links of lower rated currents. NOTE 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 6
27、0127. For dated references, subsequent amend- ments to, or revisions of, any of these publications 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 belo
28、w. For undated references, the latest edition of the normative document referred to applies. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 60127-2:1989, Miniafure fuses - Parf 2: Carfridge fuse-links IEC 601 27-3:1988, Miniafure fuses - Parf 3: Sub-miniafu
29、re fuse-links IEC 60127-4:1996, Miniafures fuses - Parf 4: Universal Modular Fuse-links (UMF) IEC 601 27-6:1994, Miniafure fuses - Parf 6: Fuse-holders for miniafure carfridge fuse-links IEC 60269 (all parts), Low-volfage fuses O BSI 22 March 2002 Page 6 EN 60127-10:2002 3 Properties of miniature fu
30、ses The miniature fuse provides protection against the effects of short circuits and sustained overloads, protecting 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, he
31、lping to identify the location of the fault. These properties include: Wide range of physical types of construction: 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 enab
32、ling easy replacement. There are also types which can be soldered on to printed wiring boards by through-hole 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 f
33、or miniaturized equipment. Wide range of characteristics: miniature fuses are generally used within electronic 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
34、. The latter types are very useful because they can withstand inrush currents experienced during switching on, 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
35、by the fuse without opening higher rated upstream fuses, avoiding disconnection of the supply to healthy circuits downstream. Reliability: miniature fuses carry operational currents continuously without any substantial change or deterioration in their characteristics, and give equal protection to th
36、at provided by a new fuse. During their long life, no maintenance is required. Tamper-proof reproducible characteristics: 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 r
37、ating, fitted after the fault has been corrected. The extensive schedule of tests in the IEC 60127 series together 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
38、 reproduced at any location world-wide. Arc dissipation: suitable fuses can disconnect faults so quickly that there is no time for an arc to become established at the fault location. Different types of fuse-links IEC 60127 makes reference to three families of fuse-links: IEC 60127-2 Cartridge fuse-l
39、inks IEC 60127-3 Sub-miniature fuse-links IEC 60127-4 Universal Modular Fuse-links (UMF) O BSI 22 March 2002 Page 7 EN 60127-10:2002 4.1 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
40、 in the various parts of IEC 60127 are characterized as follows: 0 FF - Very quick acting 0 F - Quick acting 0 M - Medium time-lag 0 T - Time-lag 0 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.
41、The fuse-element must melt within the given time gate. It should be noted that the characteristics of fuses conforming to other standards, such as CSA-C22.2 No. 248.14 + UL 248-14 Ill, could be quite different from the IEC 60127 characteristics. Additionally, these other standards may not specify th
42、e same characteristic definitions or precise time gates. Accordingly, the definition of terms such as very fast acting, fast 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 Breaki
43、ng capacity The breaking capacity of a fuse is the value of current that a fuse can safely interrupt at its rated voltage. 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 facto
44、r, closing angle, etc. In practice, a fuse shall not be used in a circuit that has a potential fault (short-circuit) current 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
45、assumed theoretical value assigned by a safety agency. In some cases, the suitability of a fuses breaking capacity is determined 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 x 20 mm and 6,3
46、mm x 32 mm. The details are specified in six standard sheets. The rated voltage is 250 V a.c. except for those fuse-links shown 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. References in square brackets refer to the bi
47、bliography. O BSI 22 March 2002 Page 8 EN 60127-10:2002 Standard sheet 1 Dimensions Characteristic Rated breaking mm capacity 5 x 20 F High (1 500 A) I 2 I 5x20 I F I LOW (35 A or IO I)* I 3 4 5 x 20 6,3 x 32 T F LOW (35 A or 1 O IN)* LOW (35 A or 1 O IN)* 5 6 * Whichever is greater. 5 x 20 T High (
48、1 500 A) 5 x 20 T Enhanced (150 A) NOTE These fuse-links are available in wire terminated form for direct connection to printed wiring boards (excluding standard sheet 4). 2 3 4.4 Sub-miniature fuse-links (IEC 60127-3) axial F Low (50 A) radial F LOW (35 A or 10 IN)* This standard consists of four s
49、tandard sheets, all of which refer to low breaking capacity fuse-links. Two types of fuse-links are described, radial and axial, for use on printed wiring boards. Standard sheet Termination Characteristic Rated breaking capacity I I 1 I radial I F I Low (50A) I I 4 I radial I T I LOW (35 A or IO I)* I * Whichever is greater. The spacing of the fuse-link terminations are designed to permit easy installation on printed wiring boards having a grid system of holes located at 2,514 mm between centres. Care should be taken that creepage and clearance distances are maintained
