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1、BRITISH STANDARD BS EN 125000:1998 Harmonized system of quality assessment for electronic components Generic specification: Cores made of ferrite materials The European Standard EN 125000:1997 has the status of a British Standard ICS 29.100.10 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 0
2、7:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 125000:1998 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 15 March 1998 BSI 04-1999 ISBN 0 580 28887 0 Na
3、tional foreword This British Standard is the English language version of EN 125000:1997 published by the European Electronic Components Committee (CECC) of the European Committee for Electrotechnical Standardization (CENELEC). It supersedes BS CECC 25000:1997 which will be withdrawn on 1998-09-01. T
4、he 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 enquiries on
5、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. Cross-references The British Stan
6、dards which implement international 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 Standa
7、rd 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, a
8、n inside front cover, pages i and ii, the EN title page, pages 2 to 11 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.
9、DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 125000:1998 BSI 04-1999i Contents Page National foreword Inside front cover Foreword 2 Text of EN 1250003 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+
10、00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 125000 December 1997 ICS 29.100.10Supersedes CECC 25 000:1976 Descriptors: Ferrite cores, ge
11、neric specification, quality assessment, capability approval, test and measurement procedures English version Generic Specification: Cores made of ferrite materials Spcification gnrique: Noyaux raliss partir de matriaux ferrites Fachgrundspezifikation: Ferritkerne This European Standard was approved
12、 by CENELEC on 1997-10-01. 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 such national
13、 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 language an
14、d 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, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,
15、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 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in
16、 any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 125000:1997 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 125000:1997 2 BSI 04-1999 Foreword This European Standard was prepared by the Technical Committee
17、 CENELEC TC/CECC SC 51X, Magnetic Components: Cores and soft magnetic materials. It is based, wherever possible on the Publications of the International Electrotechnical Commission, and in particular on IEC 60367 and IEC 60723. The text of the draft was submitted to the Unique Acceptance Procedure a
18、nd was approved by CENELEC as EN 125000 on 1997-10-01. This European Standard supersedes CECC 25 000:1976 (including its amendment A1:1982). The following dates were fixed: Contents Page Foreword2 1General3 1.1Scope3 1.2Normative references3 1.3Units, symbols and terminology4 1.3.1Multiples and sub-
19、multiples of units4 1.3.2Letter symbols4 1.3.3Definitions4 1.3.4List of parameters useful for core characterization4 1.4Standard and preferred values4 1.4.1Dimensions of cores4 1.4.2Nominal value of inductance factor AL4 1.5Marking of cores and packaging4 1.6Subcontracting4 1.7Validity of release4 2
20、Quality assessment procedures4 2.1Qualification approval5 2.1.1Primary stage of manufacture5 2.1.2Qualification approval procedures5 Page 2.1.3Quality conformance inspection requirements5 2.1.3.1Delayed delivery5 2.1.3.2Certified test records5 2.2Capability Approval5 2.2.1General5 2.2.1.1Eligibility
21、 for capability approval5 2.2.1.2Primary stage of manufacture5 2.2.1.3Subcontracting5 2.2.1.4Incorporated components6 2.2.1.5Validity of release6 2.2.1.6Rework6 2.2.2Procedures for capability approval6 2.2.2.1Application for capability approval6 2.2.2.2Granting of capability approval6 2.2.2.3Descrip
22、tion of capability6 2.2.2.4Capability Qualifying Components (CQCs)6 2.2.2.4.1 Process description8 2.2.2.4.2 Selection of CQCs vs process steps10 2.2.2.5Demonstration and verification of capability11 2.2.2.6Procedures to be followed in the event of CQC failures11 2.2.2.7Abstract of description of ca
23、pability11 2.2.3Procedures following the granting of capability approval11 2.2.3.1Maintenance of capability approval11 2.2.3.2Modifications likely to affect the validity of capability approval11 2.2.4Release for delivery11 3Test and measurement procedures (General guidance)11 Figure 1 Powder product
24、ion process7 Figure 2 Core production process8 Table 1 CQCs definitions10 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1998-09-01 latest date by which the national standards conflicting with the EN have to
25、 be withdrawn(dow) 1998-09-01 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 125000:1997 BSI 04-19993 1 General 1.1 Scope This Generic Specification is applicable to cores made of ferrite materials. These products are used in a wide rang
26、e of inductive components required for many applications in almost all industries. It establishes standard terms, inspection procedures and methods of testing for use in sectional and detail specifications within the CECC System for electronic components. 1.2 Normative references This European Stand
27、ard incorporates by dated or undated reference, provisions from other publications. These normative references 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
28、this European Standard only when incorporated in it by amendments or revision. For undated references the latest edition of the publication referred to applies. CECC 00 111, Rule of Procedure 11: Specifications. CECC 00 114, Rule of Procedure 14: Quality assessment procedures. CECC 00 200, Register
29、of firms, products and services approved under the CECC System. CECC 00 400, Handbook for the production of CECC documents. EN 60068-2, Basic environmental testing procedures. EN 125500:1996, Magnetic oxide ring cores for interference suppression and low level signal transformer applications. IEC 60
30、027:1971, Letter symbols to be used in electrical technology. IEC 60050, International Electrotechnical Vocabulary (including the Advanced Edition of Section 901 on magnetic materials). IEC 60133:1985, Dimensions for pot-cores made of magnetic oxides and associated parts. IEC 60205:1966, Calculation
31、 of the effective parameters of magnetic piece parts (+ A1:1976 + A2:1981). IEC 60226:1967, Dimensions of cross-cores (X-cores) made of magnetic oxides and associated parts (+ A1:1982). IEC 60367-1, Cores for inductors and transformers for telecommunications Part 1: Measuring Methods (+ A1:1984 + A2
32、:1992). IEC 60367-2, Cores for inductors and transformers for telecommunications Part 2: Guides for the drafting of performance specifications (+ A1:1983). IEC 60367-2A, Cores for inductors and transformers for telecommunications Part 2: Guides for the drafting of performance specifications First su
33、pplement. IEC 60401:1993, Ferrite materials Guide on the format at data appearing in manufacturers catalogues of transformer and inductor cores. IEC 60410:1973, Sampling plans and procedures for inspection by attributes. IEC 60424:1973, Guide to the specification of limits for physical imperfections
34、 of parts made from magnetic oxides. IEC 60431:1983, Dimensions of square cores (RM-cores) made of magnetic oxides and associated parts. IEC 60492:1974, Measuring method for aerial rods. IEC 60556:1982, Measuring methods for properties of gyromagnetic materials intended for application at microwave
35、frequencies. IEC 60617:1985, Graphical symbols for diagrams. IEC 60647:1979, Dimensions for magnetic oxide cores intended for use in power supplies (EC-cores). IEC 60701:1981, Axial lead cores made of magnetic oxide or iron powder. IEC 60723-1:1982, Inductor and transformer cores for telecommunicati
36、on. Part 1: Generic specification. IEC 60732:1982, Measuring methods for cylinder cores, tube cores and screw cores of magnetic oxide. IEC 61185:1992, Magnetic oxide cores (ETD-cores) intended for use in power supply applications Dimensions. IEC 61246:1994, Magnetic oxide cores (E-cores) of rectangu
37、lar cross-section and associated parts Dimensions. IEC 61247:1994, PM-cores made of magnetic oxides, and associated parts Dimensions. IEC 61332:1995, Soft Ferrite material classification. IEC 61333:1996, Marking on U and E ferrite cores. IEC 61596:1995, Magnetic oxide EP-cores and associated parts f
38、or use in inductors and transformers Dimensions. ISO 497:1973, Guide to the choice of series of preferred numbers and of series containing more rounded values of preferred numbers. ISO 1000:1981, SI units and recommendations for the use of their multiples and of certain other units. Licensed Copy: s
39、heffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 125000:1997 4 BSI 04-1999 ISO 2859-1:1989, Sampling procedures for inspection by attributes Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot by lot inspection. ISO 2859-2:1985, Sampl
40、ing procedures for inspection by attributes Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection. ISO 9000:1994, Quality and quality assurance standards Guidelines for selection and use. 1.3 Units, symbols and terminology Units, graphical symbols, letter symbols and te
41、rminology shall, whenever possible, be taken from the following documents: ISO 1000, SI units and recommendations for the use of their multiples and of certain other units. IEC 60027, Letter symbols to be used in electrical technology. IEC 60050, International Electrotechnical Vocabulary. Subclause
42、1.3.1 and 1.3.2 contain additional terminology and letter symbols applicable to inductor and transformer cores. Subclause 1.3.3 contains a definition of Capability Qualifying Components. Subclause 1.3.4 contains a list of parameters useful for core characterization. 1.3.1 Multiples and sub-multiples
43、 of units In accordance with IEC 60367-2. 1.3.2 Letter symbols In accordance with IEC 60367-2. 1.3.3 Definitions The term: Capability Qualifying Components (CQCs) stands for products being produced at given manufacturing process steps. 1.3.4 List of parameters useful for core characterization * Indu
44、ctance factor AL In accordance with subclause 3.4.4 of IEC 60367-2A AL measured at low flux density (corresponding to 4i or 4e) AL1 measured at high flux density (corresponding to 4a) AL2 measured for DC-biasing field (corresponding to 4rev) * Loss factor tan$/4i Loss at low flux density * Hysteresi
45、s material constant )B * Power loss P Loss at high flux density * Inductance L Measured at a given frequency * Temperature factor of permeability !F In accordance with IEC 60367-2A. * Disaccommodation factor DF In accordance with IEC 60367-2A. 1.4 Standard and preferred values 1.4.1 Dimensions of co
46、res Cores shall preferably be in accordance with IEC and EN Publications, such as: 1.4.2 Nominal value of inductance factor AL Nominal values of the inductance factor should preferably be taken from the R5-series of ISO 497. When other values have been used, these should be taken from another series
47、 in that standard. 1.5 Marking of cores and packaging The marking of the cores and the packaging should be in accordance with available relevant standards (e.g. IEC 61333). 1.6 Subcontracting If subcontracting is invoked it shall be in accordance with the requirements of 1.2 CECC 00 114:RP 14-II. 1.
48、7 Validity of release Where applicable the validity of release shall be in accordance with 2.2.5 CECC 00111:RP11-III. 2 Quality assessment procedures This clause is divided in two parts: * QUALIFICATION APPROVAL Procedures described in subclause 2.1. * CAPABILITY APPROVAL Procedures described in sub
49、clause 2.2. Pot-cores: IEC 60133 Square cores (RM-cores): IEC 60431 Toroids: EN 125500 EC-cores: IEC 60647 ETD-cores: IEC 61185 E-cores: IEC 61246 PM-cores: IEC 61247 EP-cores: IEC 61596 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 125000:1997 BSI 04-19995 2.1 Qualification approval 2.1.1 Primary stage of manufacture For the purpose of specifications for inductor and transformer cores made of ferrite materials, the primary stage is the final compacting of t