BS-EN-60269-3-1995 BS-88-3.1-1995 IEC-60269-3-1987.pdf

BRITISH STANDARD BS EN 60269-3:1995 BS 88-3.1:1995 IEC 269-3: 1987 Incorporating Amendment No. 1 Low-voltage fuses Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) The European Standard EN 60269-3:1995, with the incorporation of amendment A1:2003, has the status of a British Standard ? 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Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60269-3:1995 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1995 © BSI 23 February 2004 The following BSI references relate to the work on this standard: ICS 29.120.50 Committee reference PEL/32 Draft announced in BSI news March 1995 ISBN 0 580 24469 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PEL/32, Fuses, upon which the following bodies were represented: ASTA Certification Services Department of Trade and Industry (Consumer Safety Unit, C A Division) Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) Electricity Association Institution of Electrical Engineers Institution of Incorporated Executive Engineers Ministry of Defence The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Federation of the Electronics Industry Amendments issued since publication Amd. No.DateComments 1490123 February 2004Replace subclause 5.5 and deletion of subclause 8.11.2.7. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60269-3:1995 © BSI 23 February 2004 i National foreword This British Standard has been prepared by Technical Committee PEL/32 and is the English language version of EN 60269-3:1995 Low-voltage fuses Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications), including amendment A1:2003, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 60269-3:1987, including amendment 1:2003, published by the International Electrotechnical Commission (IEC). CENELEC has made an editorial correction in 7.1.4 to the text of IEC 60269-3; this is marked by a side line in the margin This British Standard is one of a series. The other Parts are as follows: BS EN 60269-1, Low-voltage fuses Part 1: General requirements. BS EN 60269-2, Low-voltage fuses Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application). Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its 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 cover, pages i and ii, the EN title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 60269-3 January 1995 + A1 October 2003 ICS 29.120.50 Descriptors: Low-voltage fuses, household applications, supplementary requirements, unskilled persons, characteristics, marking, tests English version Low-voltage fuses Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) (includes amendment A1:2003) (IEC 60269-3:1987 + A1:2003) Fusibles basse tension Partie 3: Règles supplémentaires pour les fusibles destinés à être utilisés par des personnes non qualifiées (fusibles pour usages essentiellement domestiques et analogues) (inclut lamendement A1:2003) (CEI 60269-3:1987 + A1:2003) Niederspannungssicherungen Teil 3: Zusätzliche Anforderungen an Sicherungen zum Gebrauch durch Laien (Sicherungen überwiegend für Hausinstallationen und ähnliche Anwendungen) (enthält Änderung A1:2003) (IEC 60269-3:1987 + A1:2003) This European Standard was approved by CENELEC on 1994-12-06; amendment A1 was approved by CENELEC on 2003-10-01. 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 national 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 language 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, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1995 Copyright reserved to CENELEC members Ref. No. EN 60269-3:1995 + A1:2003 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60269-3:1995 © BSI 23 February 20042 Foreword The text of the International Standard IEC 269:1987, prepared by SC 32B, Low-voltage fuses, of IEC TC 32, Fuses, was submitted to the formal vote and was approved by CENELEC as EN 60269-3 on 1994-12-06 without any modification. The following dates were fixed: For products which have complied with the relevant national standard before 1995-12-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 2000-12-01. Endorsement notice The text of the International Standard IEC 269-3:1987 was approved by CENELEC as a European Standard without modification. The following editorial corrections apply to the text of IEC 269-3:1987 Foreword to amendment A1 The text of document 32B/430/FDIS, future amendment 1 to IEC 60269-3:1987, prepared by SC 32B, Low-voltage fuses, of IEC TC 32, Fuses, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60269-3:1995 on 2003-10-01. The following dates were fixed: Endorsement notice The text of amendment 1:2003 to the International Standard IEC 60269-3:1987 was approved by CENELEC as an amendment to the European Standard without any modification. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1995-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1995-12-01 7.1.4 Non-interchangeability Replace “IEC Publication 269-3A: First supplement to IEC Publication 269-3 (1973)” by “IEC Publication 269-3-1”. latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 2004-07-01 latest date by which the national standards conflicting with the amendment have to be withdrawn(dow) 2006-10-01 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60269-3:1995 © BSI 23 February 2004 3 Contents Page Foreword 2 1General 4 1.1Scope 4 1.2Object 4 4Classification 4 5Characteristics of fuses 4 5.2Rated voltage 4 5.3Rated current 4 5.5Rated power dissipation of a fuse-link and rated acceptable power dissipation of a fuse-holder 5 5.6Limits of time-current characteristics 5 5.7Breaking range and breaking capacity 5 6Markings 5 6.4Markings of gauge-pieces 5 7Standard conditions for construction 5 7.1Mechanical design 5 7.3Temperature rise, power dissipation of the fuse-link and power acceptance of the fuse-holder 6 7.9Protection against electric shock 6 8Tests 7 8.3Verification of temperature rise and power dissipation 7 8.5Verification of the breaking capacity 7 8.11 Mechanical and miscellaneous tests 8 Appendix A Recommendations for future designs of fuses 9 Figure 1 Instant of making for Test No.1 9 Table A Minimum rated breaking capacities 5 Table IV Temperature-rise limits for terminals 6 Table B Approximate values of prospective currents for breaking-capacity test No. 2 7 Table C Mechanical strength of screw-thread 8 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60269-3:1995 4 © BSI 23 February 2004 Explanatory note In view of the fact that this standard should be read together with IEC Publication 269-1: Low-voltage Fuses Part 1: General Requirements, the numbering of its clauses and subclauses is made to correspond to the latter. Regarding the tables, their numbering also corresponds to that of IEC Publication 269-1; however, when additional tables appear, they are referred to by capital letters, for example, Table A, Table B, etc. 1 General Fuses within the scope of the requirements of this standard shall comply with all requirements of IEC Publication 269-1, if not otherwise indicated hereinafter, and shall also comply with the supplementary requirements laid down below. NOTEIf fuses which are designed for use by unskilled persons are intended to be installed where fuses for use by authorized persons are principally installed, they should also comply with the requirements of IEC Publication 269-2: Low-voltage Fuses, Part 2: Supplementary Requirements for Fuses for Use by Authorized Persons (Fuses Mainly for Industrial Application). 1.1 Scope These requirements apply to “gG” fuses for use by unskilled persons for domestic and similar applications with rated currents not exceeding 100 A and rated voltages not exceeding 500 V a.c. Additional specific requirements are given in IEC Publication 269-3-1: Low-voltage Fuses, Part 3: Supplementary Requirements for Fuses for Use by Unskilled Persons. Examples of Standardized Fuses for Use by Unskilled Persons (in preparation) for the fuse-systems described therein and for fuse-links primarily for use in plugs. 1.2 Object The following characteristics of fuses are specified in addition to IEC Publication 269-1: rated voltage; rated power-dissipation of a fuse-link and rated power-acceptance of fuse-holders; time-current characteristic; gates, I2t characteristics and conventional times and currents; rated breaking capacity; markings on fuse; standard conditions for construction; tests. 4 Classification Fuses for use by unskilled persons are classified by the fuse-system to which they belong. Examples of standardized fuse-systems for use by unskilled persons are given in IEC Publication 269-3-1. 5 Characteristics of fuses 5.2 Rated voltage The values of the standardized rated voltages given in Table I of IEC Publication 269-1 are applicable up to and including 500 V. 5.3 Rated current 5.3.2 Rated current of the fuse-holder The rated current of the fuse-holder is identical with the rated current of the largest fuse-link which the fuse-holder can accept under the conditions of these requirements. Fuses used in plugs may require special current ratings to protect adequately flexible conductors. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 10:27:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60269-3:1995 © BSI 23 February 2004 5 5.3.3 Rated current of the gauge-piece The rated current of the gauge-piece (if any) is identical with the highest rated current of the fuse-link which the gauge-piece can accept. 5.5 Rated power dissipation of a fuse-link and rated acceptable power dissipation of a fuse-holder The rated power dissipation and rated acceptable power dissipation, respectively, are particular to fuse-systems. Values for specified fuse-systems are given in IEC 60269-3-1. 5.6 Limits of time-current characteristics The standard limits for time-current characteristics based on a reference-ambient air temperature of 20 °C are given in Table II and Table III of IEC Publication 269-1. Values for rated currents below 16 A are given in IEC Publication 269-3-1. In addition to IEC Publication 269-1, conventional times and currents and gates for fuse-links without standardized rated cur