BS EN 61248-3-1997 Transformers and inductors for use in electronic and telecommunication equipment - Sectional specification for power transformers on the basis of the capability .pdf

1、BRITISH STANDARD BS EN 61248-3:1997 IEC61248-3: 1996 Transformers and inductors for use in electronic and telecommunication equipment Part 3: Sectional specification for power transformers on the basis of the capability approval procedure The European Standard EN61248-3:1997 has the status of a Brit

2、ishStandard ICS 29.180BSEN61248-3:1997 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comesintoeffect on 15November1997 BSI04-2000 ISBN 0 580 28433 6 National foreword This BritishStandar

3、d is the English language version of EN61248-3:1997. It is identical with IEC61248-3:1996. 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 unders

4、tand 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 t

5、his 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 m

6、ay 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 inter

7、national or European publications referred to in this document 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 incl

8、ude 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 inside front cover, pages

9、i andii, theEN title page, 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 CommentsBSEN61248-3:1997 B

10、SI 04-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN61248-3 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61248-3 August1997 ICS 29.180 Descriptors: Power transformers, sectional specification, capability approval, preparation of the detail specificati

11、on, inspection requirements, detail specification English version Transformers and inductors for use in electronic and telecommunication equipment Part3: Sectional specification for power transformers on the basis of the capability approval procedure (IEC61248-3:1996) Transformateurs et inductances

12、destins aux quipements lectroniques et de tlcommunications Partie3: Spcification intermdiaire pour les transformateurs de puissance sur la base de la procdure de lagrment de savoir-faire (CEI61248-3:1996) Transformatoren und Drosseln fr elektronische und nachrichtentechnische Einrichtungen Teil3: Ra

13、hmenspezifikation fr Leistungstransformatoren mit Befhigungsanerkennung (IEC61248-3:1996) 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 st

14、atus 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

15、). 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, Denmark, F

16、inland, France, Germany, Greece, Iceland, 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

17、Normung Central Secretariat: rue de 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. EN61248-3:1997 EEN61248-3:1997 BSI 04-2000 2 Foreword The text of the International Standard IEC61248-3:1996, prepare

18、d by IEC TC51, Magnetic components and ferrite materials, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN61248-3 on1997-07-01 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this stan

19、dard, Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC61248-3:1996 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

20、specification 3 3.1 General 4 3.2 Ratings 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

21、 ZA (normative) Normativereferences tointernational publicationswith their corresponding Europeanpublications 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 sta

22、ndards conflicting with the EN haveto be withdrawn (dow)1998-06-01EN61248-3:1997 BSI 04-2000 3 1 Scope This part of IEC1248 specifies how to prepare detail specifications for power transformers to be released under the terms of IEC1248-1 (QC260000) capability approval. It includes a blank detail spe

23、cification (BDS), which shows the 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 chara

24、cteristics. The components covered by this part of IEC1248 are essentially concerned with maximum transfer of power at single frequency with an essentially symmetrical waveform. 2 Normative references The following normative documents contain provisions, which, through reference in this text, consti

25、tute 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 investigate the possibility of applying the most recent editions of the n

26、ormative 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 approval and capability approval). IEC QC001001:1986, Basic rules of the IEC

27、Quality Assessment System for Electronic Components (IECQ). 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 approve

28、d under the IECQ System, including ISO9000. IEC68-2, Environmental testing Part 2: Tests. IEC68-2-6:1982, Environmental testing Part2:Tests Test Fc and guidance: Vibration (sinusoidal). IEC68-2-14:1984, Environmental testing Part2:Tests Test N: Change of temperature. Amendment1(1986) IEC68-2-20:1979

29、, 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) IEC68-2-27:1987, Environmental testing Part2:Tests Test Ea and guidance: Sho

30、ck. 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 telecommunication equipment Measuring methods and test procedures. IEC1248-1:

31、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 General principles, definitions, methods of execution and special indi

32、cations. 3 Preparation of the detail specification This standard is intended to be used for the preparation of detail specifications for power transformers released under the terms of the IEC1248-1 (QC260000) capability approval procedure. It is intended for use by the following originators: a) a cu

33、stomer wishing to procure power 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 power transformers wishing to prepare specifications for his own products wh

34、ich 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 page format and, in principle, in respect of the presentation of the inspection requirements. NOTE 2Unless otherwise specified, a

35、ll 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 inclusion in the detail specification. The tests shown in plain type are li

36、sted 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 from, less than, or additional to those given in the BDS.EN61248-3:199

37、7 4 BSI 04-2000 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 shall be so denoted in the test schedule by the addition of the notation “(D)

38、”. 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. Where100% testing is not required, inspection levels and acceptable qua

39、lity 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 (manufacturer or customer) within his own system. It is thus not subject to any externa

40、l 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 appropriate number from its register. 3.1.5 A number allocated by the component

41、 manufacturer shall be additionally included in the detail specification, comprising this specification number, his factory identification code letters, and a unique number within his registration system, for example QC260200/PQR/1234. NOTEAfter a detail specification has been allocated the manufact

42、urers 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 Ratings In the case of customer-originated detail specificat

43、ions, 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 IEC1248-1). 3.2.2 Characteristics A customer shall prescribe in th

44、e 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 moun

45、ting, 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. 3.3.3 Where the transformer is intended to be connected to a circuit supplying direct current, full details of

46、 this circuit shall be given, together with load and component values. 4 Inspection requirements to 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,

47、 normal inspection; b) tests in a group may be carried out in any order, except where otherwise indicated (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 value

48、s: measurement uncertainty is to be taken into account. 4.2 Design verification The tests to be detailed 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

49、 are to be performed only when specifically so stated in the order, and the detail specification 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 page of the BDS ha