1、BRITISH STANDARD BS EN 61248-1:1997 IEC61248-1: 1996 Transformers and inductors for use in electronic and telecommunication equipment Part 1: Generic specification The European Standard EN61248-1:1997 has the status of a BritishStandard ICS 29.180BSEN61248-1:1997 This BritishStandard, having been pr
2、epared under the directionof the ElectrotechnicalSector Board,was published undertheauthorityof the Standards Boardand comesintoeffect on 15November1997 BSI04-2000 ISBN 0 580 28434 4 National foreword This BritishStandard is the English language version of EN61248-1:1997. It is identical with IEC612
3、48-1:1996. The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformers, inductors, magnetic components and ferrite materials, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any e
4、nquiries on the interpretation, 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. From1 January1997, al
5、l IEC publications have the number60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to
6、 the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The BritishStandards which implement these international or European publications may be found in the BSI Standards Catalo
7、gue 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 British Standards are responsible for their co
8、rrect 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, pagesi andii, theEN title page, pages2 to25 and a back cover. This standard has been updated (see copyright
9、date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN61248-1:1997 BSI 04-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN61248-1 3ii blankE
10、UROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61248-1 August 1997 ICS 29.180 Supersedes EN126000:1992 Descriptors: Transformers and inductors, generic specification, tests, capability approval English version Transformers and inductors for use in electronic and telecommunication equipment Part1
11、: Generic specification (IEC61248-1:1996) Transformateurs et inductances destins aux quipements lectroniques et de tlcommunications Partie1: Spcification gnrique (CEI61248-1:1996) Transformatoren und Drosseln fr elektronische und nachrichtentechnische Einrichtungen Teil1: Fachgrundspezifikation (IEC
12、61248-1:1996) This European Standard was approved by CENELEC on1997-07-01. 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 bib
13、liographical 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 responsibil
14、ity 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Nether
15、lands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELE
16、C All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61248-1:1997 EEN61248-1:1997 BSI 04-2000 2 Foreword The text of the International Standard IEC61248-1:1996, prepared by IEC TC51, Magnetic components and ferrite materials, was submitted to
17、the Unique Acceptance Procedure and was approved by CENELEC as EN61248-1 on1997-07-01 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Anne
18、x ZA is normative and Annex A and Annex B are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC61248-1:1996 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 General 3 1.1 Scope 3 1.2 Norma
19、tive references 3 1.3 General considerations 4 1.4 Terminology 5 1.5 AQLs for particular parameter and for the whole sample of components 5 1.6 Letter symbols, signs and abbreviations 5 1.7 Graphical symbols 5 1.8 Marking of the component and package 5 1.9 Structurally similar components 5 1.10 Dela
20、yed delivery 5 1.11 Certified test records 5 1.12 Standard ratings and characteristics 6 1.13 Ordering information 7 1.14 Quality conformance inspection 7 2 Tests 7 3 Capability approval procedures 7 3.1 Eligibility for capability approval 7 3.2 Application for capability approval 8 3.3 Description
21、of capability 9 3.4 Appraisal of capability 9 3.5 Announcement of capability approval 17 3.6 Maintenance of capability approval 18 3.7 Changes to the approved capability 19 Annex A (informative) Sample format for certified test record 21 Annex B (informative) Sample format for abstract of descriptio
22、n of capability for inclusionin QC001005 (IECQ Register of approval) 21 Annex ZA (normative) Normative references tointernational publications with their corresponding European publications 24 Index 29 Table 1 Sample selection and test flow chartforthe appraisal of capability 11 Table 2 Sample selec
23、tion and test flow chart forthe maintenance of capability approval 20 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop)1998-06-01 latest date by which the national standards conflicting with the EN haveto be wi
24、thdrawn (dow)1998-06-01EN61248-1:1997 BSI 04-2000 3 1 General 1.1 Scope This part of IEC1248 is a generic specification which prescribes the compliance requirements for manufacturers of transformers and inductors for use in electronic equipment in order to obtain capability approval in accordance wi
25、th11.7 of QC001002, and the 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,
26、delayed delivery and ordering, and lists standard ratings and characteristics. In addition, it specifies how quality conformance testing should be carried out on ordered components. NOTEThe transformers and inductors that are the subject of this specification may include other components essential t
27、o the operation of the device, e.g.capacitors associated with constant voltage transformers 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 IEC1248. At the time of publ
28、ication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC1248 are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below. Members of IEC and ISO main
29、tain registers of currently valid International Standards. IEC Guide102:1989, Electronic components. Specification structures for quality assessment (Qualificationapproval and capability approval). IEC QC001001:1986, Basic rules of the IEC Quality Assessment System for Electronic Components (IECQ).
30、Amendment2(1994) IEC QC001002:1986, Rules of procedure of the IEC Quality Assessment System for Electronic Components (IECQ). Amendment2(1994) IEC QC001004, Specifications list. IEC QC001005, Register of firms, products and services approved under the IECQ System, including ISO9000. IEC50, Internati
31、onal Electrotechnical Vocabulary (IEV). IEC68-1:1988, Environmental testing Part1:General and guidance. Amendment1(1992) IEC68-2, Environmental testingPart2: Tests. IEC68-2-1:1990, Environmental testingPart2:TestsTests A: Cold. Amendment1(1993), Amendment2(1994) IEC68-2-2:1974, Environmental testing
32、Part2:TestsTests B: Dry heat. Amendment1(1993), Amendment2(1994) IEC68-2-3:1969, Environmental testingPart2:TestsTest Ca: Damp heat, steady state. IEC68-2-6:1982, Environmental testingPart2:TestsTest Fc and guidance: Vibration (sinusoidal). IEC68-2-7:1983, Environmental testingPart2:TestsTest Ga and
33、 guidance: Acceleration, steady state. Amendment1(1986) IEC68-2-13:1983, Environmental testingPart2:TestsTest M: Low air pressure. IEC68-2-14:1984, Environmental testingPart2:TestsTest N: Change of temperature. Amendment1(1986) IEC68-2-17:1994, Environmental testingPart2:TestsTest Q: Sealing. IEC68-
34、2-20:1979, Environmental testingPart2:TestsTest T: Soldering. Amendment2(1987)EN61248-1:1997 4 BSI 04-2000 IEC68-2-21:1983, Environmental testingPart2:TestsTest U: Robustness of terminations and integral mounting devices. Amendment2(1991), Amendment3(1992) IEC68-2-27:1987, Environmental testingPart2
35、:TestsTest Ea and guidance: Shock. IEC68-2-29:1987, Environmental testingPart2:TestsTest Eb and guidance: Bump. IEC68-2-58:1989, Environmental testingPart2:TestsTest Td: Solderability, resistance to dissolution of metallization and to soldering heat of Surface Mounting Devices (SMD). IEC76-1:1993, P
36、ower transformersPart1:General. IEC367-1:1982, Cores for inductors and transformers for telecommunicationsPart1:Measuring methods. Amendment1(1984), Amendment2(1992) IEC410:1973, Sampling plans and procedures for inspection by attributes. IEC617, Graphical symbols for diagrams. IEC651:1979, Sound le
37、vel meters. Amendment1(1993) IEC695, Fire hazard testing. IEC723, Inductor and transformer cores for telecommunication. IEC852-5:1994, Outline dimensions of transformers and inductors for use in telecommunication and electronic equipmentPart5: Transformers and inductors using the series Q of C-cores
38、. IEC1007:1994, Transformers and inductors for use in electronic and telecommunication equipment Measuring methods and test procedures. ISO31, Quantities and units. 1.3 General considerations For convenience, the following outline of the sequence of events in the capability approval procedure is giv
39、en. 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 collaboration with
40、 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 clause3 of this generic specification. d) When testing is successfully completed and the manufacturers systems approved ag
41、ainst the capability manual, capability approval is granted and the fact is published in QC001005. The capability approval is maintained by periodic testing of sample components at the limits of the scope of the capability. e) A potential customer makes an enquiry to the manufacturer for components
42、within the scope of capability published in QC001005 (or by CODUS). f) 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 specification is prepar
43、ed 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. NOTEThe detail specification is preferably based on one of the blanks included in the appropriate sectional specification. g) Th
44、e 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.EN61248-1:1997 BSI 04-2000 5 1.4 Terminology For the purposes of this specification
45、, the definitions of IEC1007 apply, together with those given in IEC50 and IEC410. 1.5 AQLs for particular parameter and for the whole sample of components 1.5.1 AQL for particular parameter (PAQL) The AQLs ratings designated for particular parameters listed in the inspection requirements of the det
46、ail specifications are the maximum numbers of defects per hundred units. 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 in3.4.1.1, or for a selected group (or groups) of parameters specifi
47、ed in the CQC schedules and listed in3.4.2 (e.g.for the group or groups of parameters which are for the customer of fundamental importance for the component operation). AQLs ratings for the whole sample are decided by the method1 described in1.3 f). 1.6 Letter symbols, signs and abbreviations Letter
48、 symbols, signs and abbreviations shall comply with ISO31. 1.7 Graphical symbols Graphical symbols shall comply with IEC617. 1.8 Marking 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
49、below, in the order of precedence stated: a) type designation 1) ; b) manufacturers name or trade mark; c) production lot number or date code 2) . All the above information shall appear also on the primary package. NOTE 1If a transparent package is used, the information may be marked on a label that can be read without opening the package. NOTE 2For polyphase components it is desirable to give a connection symbol as defined in IEC76-1. 1.9 Structurally similar components The requirements relating to structural si
