BS EN 61248-2-1997 Transformers and inductors for use in electronic and telecommunication equipment - Sectional specification for signal transformers on the basis of the capability.pdf

1、BRITISH STANDARD BS EN 61248-2:1997 IEC61248-2: 1996 Transformers and inductors for use in electronic and telecommunication equipment Part 2: Sectional specification for signal transformers on the basis of the capability approval procedure The European Standard EN61248-2:1997 has the status of a Bri

2、tishStandard ICS 29.180BSEN61248-2:1997 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comesintoeffect on 15November1997 BSI 04-2000 ISBN 0 580 28435 2 National foreword This BritishStand

3、ard is the English language version of EN61248-2:1997. Itis identical with IEC61248-2:1996. 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 under

4、stand 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 UK. A list of organizations represented on

5、this committee can be obtained on request to its secretary. From1 January1997, 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 numbering system to the other, publications

6、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 publications. The BritishStandards which implement thes

7、e 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 does not purport to include all the necessary

8、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 inside front cover, pagesi andii, theEN title p

9、age, pages2 to10 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 publication Amd. No. Date CommentsBSEN61248-2:1997 BSI 04-2000 i Contents

10、Page National foreword Inside front cover Foreword 2 Text of EN61248-2 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61248-2 August1997 ICS 29.180 Descriptors: Signal transformers, sectional specification, capability approval, preparation of the detail specification, inspection requir

11、ements, detail specification English version Transformers and inductors for use in electronic and telecommunication equipment Part2: Sectional specification for signal transformers onthebasis of the capability approval procedure (IEC61248-2:1996) Transformateurs et inductances destinsauxquipements l

12、ectroniques etdetlcommunications Partie2: Spcification intermdiaire pour lestransformateurs de signal sur labasede la procdure de lagrment de savoir-faire (CEI61248-2:1996) Transformatoren und Drosseln fr elektronische und nachrichtentechnische Einrichtungen Teil2: Rahmenspezifikation fr Signaltrans

13、formatoren mit Befhigungsanerkennung (IEC61248-2:1996) 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

14、 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

15、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, Denmark, Finland, France, Germany, Greece, Ic

16、eland, Ireland, Italy, Luxembourg, Netherlands, 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

17、 Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN61248-2:1997 EEN61248-2:1997 BSI 04-2000 2 Foreword The text of the International Standard IEC61248-2:1996, prepared by IEC TC51, Magnetic components

18、and ferrite materials, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN61248-2 on1997-07-01 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard,Annex ZA is normative. Annex Z

19、A has been added by CENELEC. Endorsement notice The text of the International Standard IEC61248-2:1996 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 Ra

20、tings and characteristics 4 3.3 Outline drawings and winding schematic diagram 4 4 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 ZA (normative) Normative references

21、 to international publications with their corresponding European publications 10 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 h

22、aveto be withdrawn (dow)1998-06-01EN61248-2:1997 BSI 04-2000 3 1 Scope This part of IEC1248 specifies how to prepare detail specifications for signal transformers to be released under the terms of IEC1248-1 (QC260000) capability approval. It includes a blank detail specification (BDS), which shows t

23、he format, and indicates which tests are considered to be appropriate to this type of component, although the final selection 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 cov

24、ered by this part of IEC1248 are essentially concerned with uni-directional and bi-directional transfer of signals (information) from one section of a circuit to another. These signals may have some power content, and may cover a band of frequencies. 2 Normative references The following normative do

25、cuments contain provisions, which, through reference in this text, constitute provisions of this part of IEC1248. At the time of publication, 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

26、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. IEC Guide102:1989, Electronic components. Specification structures for quality assessment (Qualification app

27、roval and capability approval). IEC QC001001:1986, Basic Rules of the IECQuality Assessment System for Electronic Components (IECQ). Amendment2(1994) IEC QC001002:1986, Rules of Procedure of the IECQuality Assessment System for Electronic Components (IECQ). Amendment2(1994) IEC QC001004, Specificati

28、ons List. IEC QC001005, Register of Firms, Products and Services approved under the IECQ System, including ISO9000. IEC68-2, Environmental testing Part2: Tests. IEC68-2-6:1982, Environmental testing Part2:Tests Test Fc and guidance: Vibration (sinusoidal). IEC68-2-14:1984, Environmental testing Part

29、2:Tests Test N: Change of temperature. Amendment1(1986) IEC68-2-20:1979, Environmental testing Part2:Tests Test T: Soldering. Amendment2(1987) IEC68-2-21:1983, Environmental testing Part2:Tests Test U: Robustness of terminations and integral mounting devices. Amendment2(1991), Amendment3(1992) IEC68

30、-2-27:1987, Environmental testing Part2:Tests Test Ea and Guidance: Shock. IEC68-2-29:1987, Environmental testing Part2:Tests Test Eb and Guidance: Bump. IEC410:1973, Sampling plans and procedures for inspection by attributes. IEC1007:1994, Transformers and inductors for use in electronic and teleco

31、mmunication equipment Measuring methods and test procedures. IEC1248-1:1996, Transformers and inductors for use in electronic and telecommunication equipment Part1: Generic specification. ISO128:1982, Technical drawings General principles of presentation. ISO129:1985, Technical drawings Dimensioning

32、 General principles, definitions, methods 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 signal transformers released under the terms of the IEC1248-1 (QC260000) capability approval

33、 procedure. It is intended for use by the following originators: a) a customer wishing to procure signal transformers that are within the scope of the approved capability of his supplying component manufacturer, for example for detail specifications (DS); b) a capability-approved manufacturer of sig

34、nal 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 clause5, particularly in respect of the front cover format and, in principle, in respect of the prese

35、ntation of the inspection requirements. NOTE 2Unless otherwise specified, all the tests shown in the BDS are taken from IEC1007. Those shown underlined concern operating characteristics of fundamental importance, and it is strongly recommended that these are selected by the specification writer for

36、inclusion 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.EN61248-2:1997 4 BSI 04-2000 NOTE 3The specification writer may specify tes

37、ts and sampling levels different 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 IEC1007 are required, these shall be fully specified in the detail specification. 3.1.2 Any tests considered as being destructive sh

38、all be so 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 requir

39、ed. Where100% testing is not required, inspection levels and acceptable quality levels shall be selected from IEC410. 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 (manufacture

40、r or customer) within his own system. It is thus not subject to any external rules or codification. NOTE 2In the special 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 appr

41、opriate number from its register. 3.1.5 Additionally, a number shall be allocated by the component manufacturer to be included in the detail specification, comprising this specification number, his factory identification code letters, and a unique number within his registration system, forexample QC

42、260100/PQR/1234. NOTEAfter a detail specification has been allocated 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 c

43、haracteristics 3.2.1 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 (

44、seealso 1.12 of IEC1248-1). 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 fea

45、tures, 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, screens, taps and phasings, and giving termination identification. 4 Inspection requirements to

46、 be listed in the detail specification 4.1 Conformance inspection The detail specification shall incorporate the following notes: a) sampling inspections shall be carried out in accordance with IEC410, normal inspection; b) tests in a group may be carried out in any order, except where otherwise ind

47、icated (see3.1.3); c) components submitted to any tests marked (D) may not be released under IEC1248-1 capability approval (D = destructive); d) the values given for measurement limits are absolute values: measurement uncertainty is to be taken into account. 4.2 Design verification The tests to be d

48、etailed under this heading are those which the specification writer considers to be inappropriate to lot-by-lot release, but appropriate to the verification of new and original designs. Accordingly, they are to be performed only when specifically so stated in the order, and the detail specification

49、shall carry a statement to this effect. If design verification is required, the number of specimens and the requirement that there shall be no failures shall be stated in the detail specification. NOTETwo specimens should normally be provided, unless otherwise stated. 5 Detail specification The BDS which follows, when completed in accordance with clause3, shall form the relevant detail specification. NOTEThe front cover of the BDS has been based upon the need for a customers detail specification. Where a manufacturers detail s