1、BRITISH STANDARD Tkansformers and inductors for use in electronic and telecommunication equipment Part 1. Generic specification “he European Standard EN 612481 : 1997 has the status of a British Standard ICs 29.180 BS EN 61248-1 : 1997 IEC 61248-1 : 1996 BS EN 61248-1 : 1997 Amd. No. National forewo
2、rd Date Text affected This British Standard is the English language version of EN 61248-1 : 1997. It is identical with EC 612481 : 1996. The UK participation in its preparation was entrusted to Technical Committee EPIJ51, lhnsfonners, inductors, magnetic components and femite materials, which has th
3、e responsibility to: - aid enquirers to understand the text, - present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European developments and promulgate them i
4、n the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Rom 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
5、from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is dram to the fact that CEN and CENELEC Standards normaiiy include an annex which lists nonnative references to international publications with their corresponding European pub
6、lications. The British Standards which implement these international or European publications 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. Compliance with
7、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 32, an inside back cover and a back cover. This British Standard, having been prepared under the direction of the
8、 Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1997 O BSI 1997 ISBN O 680 28434 4 STDaBSI BS EN bLZYB-L-ENGL 1777 lb2qbb7 Ob587LO 5bT * * u2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 612484 August 1997 ICs 29.1
9、80 Descriptors: Supersedes EN 126000: 1992 Transformers and inductors, generic specification, tests, capability approval English version Transformers and inductors for use in electronic and telecommunication equipment Part 1 : Generic specification (IEC 6 1 248-1 : 1 996) Transformateurs et inductan
10、ces destins aux quipements lectroniques et de tlcommunications Einrichtungen Partie 1 : Spcification gnrique Transformatoren und Drosseln fr elektronische und nachrichtentechnische Teil 1 : Fachgrundspezifikation (CE1 61 248-1 : 1996) (IEC 61 248-1 : 1996) This European Standard was approved by CENE
11、LEC on 1997-07-01. CENELEC members are bound to comply with the CENKENELEC Internai Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists and bibiiographical references concerning such national standards
12、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
13、to the Centrai Secretariat has the same status as the officiai versions. CENELEC members am the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Unit
14、ed Kingdom. CENELEC European Committee for Electrotechnical Standardization Comitd Europen de Normalisation Electrotechnique Europaisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 1997 CENELEC - Ali rights of exploitation in any form and by any m
15、eans reserved worldwide for CENELEC members. Ref, No. EN 61248-1:1997 E STD-BSI BS EN b1248-1-ENGL 1997 m lb24bb Ob58711 4Tb Page 2 EN 61248-1 : 1997 Foreword The text of the International Standard IEC 61 248-1 : 1996, prepared by IEC TC 5 1, Magnetic components and ferrite materials, was submitted
16、to the Unique Acceptance Procedure and was approved by CENELEC as EN 61 248-1 on 1997-07-01 without any modification. The following 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) 1998-06
17、-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dw) 1998-06-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A a
18、nd B are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 61 248-1 :1996 was approved by CENELEC as a European Standard without any modification. STD-BSI BS EN h124-1-ENGL 1777 1b2LibbS b58712 332 m Page 3 EN 61248-1 : 1997 CONTENTS claus
19、e page 1 General 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1 . 13 1.14 Scope Normative references . General considerations Terminology . AQLs for particular parameter and for the whole sample of components Letter symbols, signs and abbreviations Graphical symbols . Marking of the component
20、and package Structurally similar components Delayed delivery Certified test records i . Standard ratings and characteristics . Ordering information . Quality conformance inspection 2 Tests . 3 Capability approval procedures . 3.1 Eligibility for capability approval . 3.2 Application for capability a
21、pproval 3.3 Description of capability . 3.4 Appraisal of capability i . 3.5 Announcement of capability approval . 3.6 Maintenance of capability approval 3.7 Changes to the approved capability . Tables 1 Sample selection and test flow chart for the appraisal of capability . 2 Sample selection and tes
22、t flow chart for the maintenance of capability approval . 4 4 4 6 6 7 7 7 7 8 8 8 8 9 10 10 10 io 11 13 13 23 24 24 16 26 Annexes A Sample format for certified test record 27 B Sample format for abstract of description of capability for inclusion in QC O01 O05 (IECQ Register of approval) 28 ZA (norm
23、ative) Normative references to international publications with their corresponding European publications 30 INDEX . 29 O BSI 1997 STD-BSI BS EN bL248-1-ENGL 1777 = Lb24bb7 Ob58713 277 Page 4 EN 61248-1 : 1997 TRANSFORMERS AND INDUCTORS FOR USE IN ELECTRONIC AND TELECOMMUNICATION EQUIPMENT Part 1 : G
24、eneric specification 1 General 1.1 Scope This part of IEC 1248 is a generic specification which prescribes the compliance require- ments for manufacturers of transformers and inductors for use in electronic equipment in order to obtain capability approval in accordance with 11.7 of OC 001002, and th
25、e component test schedules to be used for the assessment of that capability. It applies to components, including polyphase types, that are primarily intended for use in electronic and telecommunication equipment. This specification also prescribes requirements for marking, delayed delivery and order
26、ing, and lists standard ratings and characteristics. In addition, it specifies how quality confor- mance testing should be carried out on ordered components. NOTE - The transformers and inductors that are the subject of this specification may include other compo- nents essential to the operation of
27、the device, e.9. capacitors associated with constant voltage trans- formers and resonated windings. 1.2 Normative references The following normative documents contain provisions, which, through reference in this text, constitute provisions of this part of IEC 1248. At the time of publication, the ed
28、itions indicated were valid. AI1 normative documents are subject to revision, and parties to agreements based on this part of IEC 1248 are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below. Members of IEC and IS0 maintain registers
29、 of currently valid International Standards. IEC Guide 102: 1989, Electronic components. Specification structures for quality assess- ment (Qualification approval and capability approval) IEC QC 001001: 1986, Basic rules of the IEC Quality Assessment System for Electronic Components (IECQ) Amendment
30、 2 (1994) IEC QC 001002: 1986. Rules of procedure of the IEC Quality Assessment System for Electronic Components (IECQ) Amendment 2 (1994) IEC QC 001004: Specifications list IEC QC 001005: Register of firms, products and services approved under the IECQ Sys- tem, including IS0 9000 IEC 50: Internati
31、onal Electrotechnical Vocabulary (IEV) STD-BSI BS EN b1248-L-ENGL 1777 D 1b2Libb9 Ob58714 105 D Page 5 EN 61248-1 : 1997 IEC 68-1 : 1988, Environmental testing, Part I: General and guidance Amendment 1 (1992) IEC 68-2: Environmental testing - Part 2: Tests IEC 68-2-1 : 1990, Environmental testing -
32、Part 2: Tests - Tests A: Cold Amendment 1 (1993), Amendment 2 (1994) IEC 68-2-2: 1974, Environmental testing - Part 2: Tests - Tests 6: Dry heat Amendment 1 (1993), Amendment 2 (1994) IEC 68-2-3: 1969, Environmental testing - Part 2: Tests - Test Ca: Damp heat, steady state IEC 68-2-6: 1982, Environ
33、mental testing - Part 2: Tests - Test Fc and guidance: Vibration (sinusoidal) IEC 68-2-7: 1983, Environmental testing - Part 2: Tests - Test Ga and guidance: Acceler- ation, steady state Amendment 1 (1986) IEC 68-2-1 3: 1983, Environmental testing - Part 2: Tests - Test M: Low air pressure IEC 68-2-
34、1 4: 1984, Environmental testing - Part 2: Tests - Test N: Change of temperature Amendment 1 (1986) IEC 68-2-17: 1994, Environmental testing - Part 2: Tests - Test Q: Sealing IEC 68-2-20: 1979, Environmental testing - Part 2: Tests - Test T: Soldering Amendment 2 (1987) IEC 68-2-21: 1983, Envifonmen
35、tal testing - Part 2: Tests - Test U: Robustness of ter- minations and integral mounting devices Amendment 2 (1991), Amendment 3 (1992) IEC 68-2-27: 1987, Environmental testing - Part 2: Tests - Test Ea and guidance: Shock IEC 68-2-29: 1987, Environmental testing - Part 2: Tests - Test Eb and guidan
36、ce: Bump IEC 68-2-58: 1989, Environmental testing - Part 2: Tests - Test Td: Solderability, resistance to dissolution of metallization and to soldering heat of Surface Mounting Devices (SMD) IEC 76-1: 1993, Power transformers - Part I: General IEC 367-1: 1982, Cores for inductors and transformers fo
37、r telecommunications - Part 1: Measuring methods Amendment 1 (1984), Amendment 2 (1992) IEC 41 O: 1973, Sampling plans and procedures for inspection by attributes IEC 61 7: Graphical symbols for diagrams IEC 651 : 1979. Sound level meters Amendment 1 (1993) STD-BSI BS EN b32LI8-L-ENGL 1797 Lb24bb7 O
38、b58735 U41 Page 6 EN 61248-1 : 1997 IEC 695: Fire hazard testing IEC 723: Inductor and transformer cores for telecommunication IEC 852-5: 1994, Outline dimensions of transformers and inductors for use in telecommuni- cation and electronic equipment - Part 5: Transformers and inductors using the seri
39、es Q of C-cores IEC 1007: 1994, Transformers and inductors for use in electronic and telecommunication equipment - Measuring methods and test procedures IS0 31 : Quantities and units 1.3 General considerations For convenience, the following outline of the sequence of events in the capability approva
40、l procedure is given. a) A manufacturer wishing to obtain capability approval writes a capability manual which clearly defines the scope of his design capability, manufacturing processes and quality control, to the satisfaction of the National Supervising Inspectorate (NSI). b) The manufacturer, in
41、collaboration with the NSI, selects sample components to demonstrate the limits of this scope, and the sample is assessed. c) These components are submitted to a test programme in accordance with clause 3 of this generic specification. d) When testing is successfully completed and the manufacturers
42、systems approved against the capability manual, capability approval is granted and the fact is published in QC 001005. The capability approval is maintained by periodic testing of sample compo- nents at the limits of the scope of the capability. e) A potential customer makes an enquiry to the manufa
43、cturer for components within the scope of capability published in QC 001005 (or by CODUS). 1) The specification will be decided by the following two methods: 1) the specification is negotiated between the manufacturer and the customer until an agreed detail specification is finalized; 2) the detail
44、specification is prepared by the manufacturer for his series of catalogue products. The customer will check the detail specification which will be modified by the customers request if necessary. NOTE - The detail specification is preferably based on one of the blanks included in the appropriate sect
45、ional specification. g) The manufacturer allocates a reference number to the resulting detail specification which is filed and is available for scrutiny by the NSI. The component is inspected and released in accordance with this specification. 1.4 Terminology For the purposes of this specification,
46、the definitions of IEC 1007 apply, together with those given in IEC 50 and IEC 410. Page 7 EN 61248-1 : 1997 1.5 .AQLs for particular parameter and for the whole sample of components 1.5.1 The AQLs ratings designated for particular parameters listed in the inspection require- ments of the detail spe
47、cifications are the maximum numbers of defects per hundred units. AQL for particular parameter (PAQL) 1.5.2 AQL for the whole sample of components (SAQL) The AQLs can be designated as the maximum percent defective for the whole sample of components, as defined in 3.4.1.1, or for a selected group (or
48、 groups) of parameters specified in the CQC schedules and listed in 3.4.2 (e.g. for the group or groups of parame- ters which are for the customer of fundamental importance for the component operation). AQLs ratings for the whole sample are decided by the method 1 described in 1.3 1). 1.6 Letter sym
49、bols, signs and abbreviations Letter symbols, signs and abbreviations shall comply with IS0 31. 1.7 Graphical symbols Graphical symbols shall comply with IEC 61 7. 1.8 Malking of the Component and package Unless otherwise specified in the detail specification, each component shall be marked as far as it is practical with the items given below, in the order of precedence stated: a) type designation); b) manufacturers name or trade mark; c) production lot number or date code2). All the above information shall appear also on the primary package. NOTES 1 open
