1、BRITISH STANDARD BS EN 61248-7:1998 IEC 61248-7: 1997 Transformers and inductors for use in electronic and telecommunication equipment Part 7: Sectional specification for high-frequency inductors and intermediate transformers on the basis of the capability approval procedure The European Standard EN
2、 61248-7:1997 has the status of a British Standard ICS 29.180BSEN 61248-7:1998 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 15March1998 BSI 04-1999 ISBN 0 580 28
3、429 8 National foreword This British Standard is the English language version of EN61248-7:1997. It is identical with IEC61248-7:1997. The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformers, inductors, magnetic components and ferrite materials, which has th
4、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 in the
5、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 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
6、 numbering system to the other, publications may contain identifiers from both systems. 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 publicatio
7、ns. 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. A British Standard
8、does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their 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 i
9、nside front cover, pages i and ii, theEN title page, pages 2 to 18, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since pu
10、blication Amd. No. Date CommentsBSEN61248-7:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61248-7 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61248-7 August 1997 ICS 29.180 Descriptors: Transformers and inductors, telecommunication equi
11、pment, intermediate frequency transformers, high-frequency inductors, sectional specification, capability approval English version Transformers and inductors for use in electronic and telecommunication equipment Part7: Sectional specification for high-frequency inductors and intermediate frequency t
12、ransformers on the basis of the capability approval procedure (IEC 61248-7:1997) Transformateurs et inductances destins aux quipements lectroniques et de tlcommunications Partie7: Spcification intermdiaire pour les inductances haute frquence et pour les transformateurs frquence intermdiaire sur la b
13、ase de la procdure dagrment de savoir-faire (CEI61248-7:1997) Transformatoren und Drossein fr elektronische und nachrichtentechnische Einrichtungen Teil7: Rahmenspezifikation fr HF-Drossein und ZF-Transformatoren auf der Grundlage der Befhigungsanerkennung (IEC61248-7:1997) This European Standard wa
14、s approved by CENELEC on 1997-07-01. 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 bibliographical references concerning suc
15、h 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 l
16、anguage 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, Netherlands, Norway, Portugal, Spain, Sweden
17、, Switzerland and United Kingdom. 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 CENELEC All rights of exploitation in any f
18、orm and by any means reserved worldwide for CENELEC members. Ref. No. EN 61248-7:1997 EEN61248-7:1997 BSI 04-1999 2 Foreword The text of document 51/441/FDIS, future edition1 of IEC61248-7, prepared by IEC TC51, Magnetic components and ferrite materials, was submitted to the IEC-CENELEC parallel vot
19、e and was approved by CENELEC as EN61248-7 on1997-07-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard,Annex A andAnnex ZA are normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Stand
20、ard IEC61248-7:1997 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Preparation of the detail specification 3 3.1 General 4 3.2 Ratings and characteristics 4 3.3 Outline drawings and winding schematic diagram 4 4
21、Inspection requirements to be listed in the detail specification 4 4.1 Conformance inspection 4 4.2 Design verification 4 5 Detail specification 4 Blank detail specification 5 Annex A (normative) Test methods peculiar to coils or intermediate frequency transformers 12 Annex ZA (normative) Normative
22、references to international publications with their corresponding European publications Inside back cover Figure A.1 Example of measurement circuit by minimum output method (for series resonance) 13 Figure A.2 Example of measurement circuit by minimum output method (for parallel resonance) 14 Figure
23、 A.3 Example of measurement circuit by series resonance method 15 Figure A.4 Example of measurement circuit by operating characteristic method 15 Figure A.5 Example of measurement circuit by bridge method 17 Figure A.6 Example of measurement circuit by voltmeter and ammeter method 18 Table A.1 Press
24、urizing force 12 Table A.2 Torque for measurement of strength of rotation stopper 12 Table A.3 Force for pressurized rotation 13 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-04-01 latest date by whic
25、h the national standards conflicting with the EN have to be withdrawn (dow) 1998-04-01EN61248-7:1997 BSI 04-1999 3 1 Scope This part of IEC 61248 specifies how to prepare detail specifications for high-frequency inductors and intermediate frequency transformers between10kHz and2GHz for use in electr
26、onic and telecommunication equipment to be released under the terms of IEC61248-1 (QC260000) capability approval. It includes a blank detail specification (BDS), which shows the format and indicates which tests are considered to be appropriate to this type of component, although the final selection
27、of tests to be included in the inspection schedule is at the discretion of the specification writer. It also lists appropriate ratings and characteristics. The components covered by this part of IEC61248 are essentially concerned with high-frequency inductors and intermediate frequency transformers
28、of signals which are mainly used for electronic equipment. 2 Normative references The following normative documents contain provisions, which, through reference in this text, constitute provisions of this part of IEC61248. At the time of publication, the editions indicated were valid. All normative
29、documents are subject to revision, and parties to agreements based on this part of IEC61248 are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below. Members of IEC and ISO maintain registers of currently valid International Standards
30、. IEC Guide 102:1996, Electronic components Specification structures for quality assessment (Qualification approval and capability approval). IEC QC 001001:1986, Basic rules of the IEC Quality Assessment System for Electronic Components (IECQ). Amendment 2 (1994) IEC QC 001002:1986, Rules of procedu
31、re 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 System, including ISO 9000. IEC 60068-2-2:1974, Environmental testing Part2: Tests Tests B:
32、 Dry heat. IEC 60068-2-3:1969, Environmental testing Part2: Tests Test Ca: Damp heat, steady state. IEC 60068-2-6:1995, Environmental testing Part2: Tests Test Fc: Vibration (sinusoidal). IEC 60068-2-14:1984, Environmental testing Part2: Tests Test N: Change of temperature. Amendment 1 (1986) IEC 60
33、068-2-20:1979, Environmental testing Part 2: Tests Test T: Soldering. Amendment2(1987) IEC 60068-2-21:1983, Environmental testing Part 2: Tests Test U: Robustness of terminations and integral mounting devices. Amendment 2 (1991) Amendment 3 (1992) IEC 60068-2-27:1987, Environmental testing Part 2: T
34、ests Test Ea and guidance: Shock. IEC 60068-2-29:1987, Environmental testing Part2: Tests Test Eb and guidance: Bump. IEC 60410:1973, Sampling plans and procedures for inspection by attributes. IEC 61007:1994, Transformers and inductors for use in electronic and telecommunication equipment Measureme
35、nt methods and test procedures. IEC 61248-1:1996, Transformers and inductors for use in electronic and telecommunication equipment Part1: Generic specification. ISO 128:1982, Technical drawings General principles of presentation. ISO 129:1985, Technical drawings Dimensioning General principles, defi
36、nitions, method of execution and special indications. 3 Preparation of the detail specification This standard is intended to be used for the preparation of detail specifications for high-frequency inductors and intermediate frequency transformers released under the terms of the IEC61248-1 (QC260000)
37、 capability approval procedure. It is intended for use by the following originators: a) a customer wishing to procure high-frequency inductors and intermediate frequency transformers that are within the scope of the approved capability of his supplying component manufacturer, e.g.for detail specific
38、ations (DS); b) a capability approved manufacturer of high-frequency inductors and intermediate frequency transformers wishing to prepare specifications for his own products which are within the scope of his capability approval. NOTE 1The detail specification should take the form of the BDS shown in
39、 clause5, particularly in respect of the front page format and, in principle, in respect of the presentation of the inspection requirements.EN61248-7:1997 4 BSI 04-1999 NOTE 2Unless otherwise specified, all the tests shown in the BDS, with the exception of the rotating torque, characteristic under p
40、ressure, strength of adjusting mechanism, resonance frequency and inductance tests given inAnnex A, are taken from IEC61007. Those shown underlined concern operating characteristics of fundamental importance and it is strongly recommended that these are selected by the specification writer for inclu
41、sion in the detail specification. The tests shown in plain type are listed for the convenience of the specification writer, and tests should be selected from them according to the particular application of the component. NOTE 3The specification writer may specify tests and sampling levels different
42、from, less than, or additional to those given in the BDS. 3.1 General 3.1.1 Where additional tests of a type not defined or invoked in this specification or IEC61007 are required, these shall be fully specified in the detail specification. 3.1.2 Any tests considered as being destructive shall be so
43、denoted in the test schedule by the addition of the notation “(D)”. NOTEThe use of this notation is not illustrated in the BDS. 3.1.3 Tests shall be grouped in the schedule according to the level of sampling required and, unless otherwise indicated see4.1 b), in the order of testing required. Where1
44、00% testing is not required, inspection levels and acceptable quality levels shall be selected from IEC60410. 3.1.4 The completed detail specification shall be allocated a component identity number and issue status by the originator. NOTE 1This number is chosen by the originator (manufacturer or cus
45、tomer) within his own system. It is thus not subject to any external rules or codification. NOTE 2In the case of a manufacturers detail specification for a standard catalogue item which the manufacturer wishes to be listed in IEC QC001004, the national committee will allocate an appropriate number f
46、rom its register. 3.1.5 A number allocated by the component manufacturer shall additionally be included in the detail specification, comprising this specification number, his factory identification code letters and a unique number within his registration system, e.g.QC260600/PQR/1234. NOTEAfter a de
47、tail specification number has been allocated by the manufacturers reference number, in accordance with3.1.5, it is to be considered a contractual part of the order. Copies of all such detail specifications are to be retained by the manufacturers chief inspector. 3.2 Ratings and characteristics 3.2.1
48、 Ratings In the case of customer-originated detail specifications, customer and manufacturer agreement shall be obtained on the ratings to be ascribed to the component in the detail specification. These ratings shall not exceed the scope of the manufacturers capability approval (seealso1.12 of IEC61
49、248-1). 3.2.2 Characteristics A customer shall prescribe in the detail specification any characteristic required for a component. 3.3 Outline drawings and winding schematic diagram 3.3.1 The detail specification shall incorporate a drawing of the transformer showing important features, such as those dimensions affecting interchangeability, restrictions on mounting and marking requirements. 3.3.2 The detail specification shall incorporate a schematic diagram showing all windings,
