1、BRITISH STANDARD BS EN 61333:1998 IEC 61333:1996 Marking on U and E ferrite cores The European Standard EN 61333:1998 has the status of a British Standard ICS 29.100.10BS EN 61333:1998 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published
2、 under the authority of the Standards Board and comes into effect on 15 June 1998 BSI 05-1999 ISBN 0 580 29935 X National foreword This British Standard is the English language version of EN 61333:1998. It is identical with IEC 61333:1996. The UK participation in its preparation was entrusted to Tec
3、hnical 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 enquiries on the interpretation, or proposals for change, and keep the U
4、K 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. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For
5、 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 the fact that CEN and CENELEC Standards normally include an annex w
6、hich lists normative references to international publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Internationa
7、l 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 correct application. Compliance with a British
8、 Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have
9、 had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN61333:1998 BSI05-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61333 3ii blankEUROPEAN STANDARD NORME
10、 EUROPENNE EUROPISCHE NORM EN 61333 April 1998 ICS 29.040.10; 29.100.10 Descriptors: Ferrite cores, U and E cores, marking locations, marking content English version Marking on U and E ferrite cores (IEC 61333:1996) Marquage des noyaux ferrites U et E (CEI 61333:1996) Kennzeichnung von U- und E-Ferr
11、itkernen (IEC 61333:1996) This European Standard was approved by CENELEC on 1998-04-01. 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
12、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 made by translation under th
13、e 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Irela
14、nd, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, 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 3
15、5, B-1050 Brussels 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61333:1998 EEN 61333:1998 BSI05-1999 2 Foreword The text of the International Standard IEC 61333:1996, prepared by IEC TC 51, Magnetic components and ferrite ma
16、terials, was submitted to the formal vote and was approved by CENELEC as EN 61333 on 1998-04-01 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 ZA has been added by CENELEC.
17、Endorsement notice The text of the International Standard IEC 61333:1996 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 3 2 Normative reference 3 3 Marking locations 3 4 Marking content 3 4.1 General 3 4.2 Material identification code 3 4.3
18、A Lvalue or gap length 4 Annex ZA (normative) Normative referencestointernational publications withtheircorresponding European publications Inside back cover Figure 1 Examples of marking locations 3 Table 1 Examples of the coding of the A L valueand gap length 4 latest date by which the EN has to be
19、 implemented at national level by publication of an identical national standard or by endorsement (dop)1999-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow)1999-03-01EN61333:1998 BSI05-1999 3 1 Scope This International Standard specifies marking lo
20、cations and a coding system of marking, especially for U and E shape ferrite cores. An alphanumerical marking printed or attached to cores reduces the risk of incorrect assembly, mixing of materials and/or mixing of gapped cores on an assembly line. The markings of the A Lvalue or of the gap length
21、are especially important to avoid this kind of problem and the coding system is specified in this standard. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publicati
22、on, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative document indicated below. Members of IEC and ISO ma
23、intain registers of currently valid International Standards. IEC 62:1992, Marking codes for resistors and capacitors. 3 Marking locations The three locations listed below are recommended for the marking as shown in Figure 1: marking on back surface; marking on lateral areas of back wall; marking on
24、external surface of outer leg. 4 Marking content 4.1 General The following information should be marked on ferrite cores, and the priority of information should follow the order given below if the marking space is limited. A maximum of four lines of marking should be allowed, which include: a) mater
25、ial; b) A Lvalue or gap length; c) date code or batch code; d) trade name or identification of the manufacturer; e) tolerance of A Lvalue or gap length; f) information for a special air-gap geometry such as step gap. The coding systems for date code and tolerance of A Lvalue specified in IEC62 may b
26、e used. The marking shall be legible and shall be able to withstand normal handling. 4.2 Material identification code A maximum of four digits of alphanumerical coding is recommended for material identification. Details of coding should be left free for each manufacturers system. Figure 1 Examples o
27、f marking locationsEN 61333:1998 4 BSI 05-1999 4.3 A Lvalue or gap length The A Lvalue or gap length should be marked on a gapped core only. The coding of the A Lvalue should consist of the letter A (asymmetric gap) and of the A Lvalue in the case where a core set has an air-gap only on one half of
28、it. The coding of the A Lvalue should consist of the letter E (equal gaps) and of the A Lvalue in the case where a core set has air-gaps on both halves. For example, the A Lvalue 630 should be expressed as A630 in the case of an air-gap only on one half of the core set, and the A Lvalue630 should be
29、 expressed as E630 in the case where the core set has air-gaps on both halves. The coding of the gap length should consist of the letter G and the gap length expressed in hundredths of a millimetre corresponding to the gap on the relevant core half only. For example, a gap length of1,25mm should be
30、expressed as G125. For a better understanding of this coding system, other examples of the coding are shown in Table 1. Table 1 Examples of the coding of the A Lvalue and gap length Table 1.a A Lvalue A Lvalue nH An air-gap on a half of core set a Air-gaps on both of core halves b 16 A16 E16 160 A16
31、0 E160 1600 A1600 E1600 NOTENo marking of A Lvalue for ungapped cores. a A: A Lvalues with an air-gap on a half of core set. b E: A Lvalues with symmetrical air-gaps. Table 1.b Gap length Gap length mm On each gapped core c 0 No marking 0,03 G3 0,15 G15 1,50 G150 10,5 G1050 c G: Air-gap lengths expr
32、essed in hundredths of a millimetre.EN61333:1998 BSI 05-1999 Annex ZA (normative) Normative references to international publications with their corresponding European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative r
33、eferences are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references
34、the latest edition of the publication referred to applies (including amendments). NOTEWhen an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60062 1992 Marking codes for resistors and capacito
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