1、BRITISH STANDARD BS EN 125400:1993 CECC 25400: 1982 Incorporating Amendment No. 1 Harmonized system of quality assessment for electronic components Sectional specification: Adjusters used with magnetic oxide cores for use in inductors and tuned transformers The European Standard EN 125400:1991 has t
2、he status of a British StandardBSEN125400:1993 This British Standard, having been prepared under the directionof the Electronic Components Standards Committee, was published underthe authority of the BoardofBSI and comes intoeffecton 28September1984 BSI 03-2000 The following BSI references relate to
3、 thework on this standard: Committee reference ECL/20 Draft for comment 80/27918 DC ISBN 0 580 14004 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Electronic Components Standards Committee (ECL/-) to Technical Committee ECL/20 upon w
4、hich the following bodies were represented: Electronic Components Industry Federation Electronic Engineering Association Ministry of Defence National Supervising Inspectorate Telecommunication Engineering and Manufacturing Association (TEMA) Amendments issued since publication Amd. No. Date of issue
5、 Comments 7579 February 1993 Indicated by a sideline in the marginBSEN125400:1993 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword iii Text of CECC 25400 1 Publications referred to Inside back coverBSEN125400:1993 ii BSI 03-2000 National foreword Th
6、is British Standard has been prepared under the direction of the Electronic Components Standards Committee. It is identical with CENELEC Electronic Components Committee (CECC) 25400:1982 “Harmonized system of quality assessment for electronic components: Sectional specification: Adjusters used with
7、magnetic oxide cores for use in inductors and tuned transformers”. In 1991 the CENELEC Electronic Components Committee (CECC) accepted CECC 25400:1982 as European Standard EN 125400:1991. As a consequence of implementing the European Standard this British Standard is renumbered as BSEN 125400 and an
8、y reference to BS CECC 25400 should be read as a reference to BSEN 125400. This standard is a harmonized specification within the CECC system. Terminology and conventions. The text of the CECC specification has been approved as suitable for publication as a British Standard without deviation. Some t
9、erminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Cross-referen
10、ces. The British Standard which implements CECC 00100 is BS9000 “General requirements for a system for electronic components of assessed quality” Part 2:1983 “Specification for national implementation of CECC basic rules and rules of procedure”. International Standards Corresponding British Standard
11、s IEC 367 BS 5938 Cores for inductors and transformers for telecommunications IEC 367-1:1971 a Part 1:1980 Methods of measurement (Identical) IEC 367-2:1974 a Part 2:1980 Guide for drafting performance specifications (Identical) CECC 25000:1976 BS CECC 25000:1977 Specification for harmonized system
12、of quality assessment for electronic components: Generic specification: Inductor and transformer cores for telecommunications (Identical) CECC 25100:1976 BS CECC 25100:1977 Specification for harmonized system of quality assessment for electronic components: Sectional specification: Magnetic oxide co
13、res for inductor applications (Identical) CECC 25401:1982 BS CECC 25401:1984 Specification for harmonized system of quality assessment for electronic components: Blank detail specification: Adjustors used with magnetic oxide (ferrite) cores for use in inductors and tuned transformers (Identical) a I
14、ndividual Parts not referred to in the text.BSEN125400:1993 BSI 03-2000 iii 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 Standard does not of itself confe
15、r immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, theENtitle page, page 2, the CECC title page, pages ii to iv, pages 1 and 2, aninside back cover and aback cover. This standard has been updated (see copyright date) and m
16、ay have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 125400 December 1991 Descriptors: Quality, electronic components, adjusters Englishversion Sectional Specification: Adjusters used
17、 with magnetic oxide cores for use in inductors and turned transformers Spcification Intermdiaire: Btonnets de rglage employs avec des noyaux en oxydes magntiques destins aux bobines dinductance et transformateurs accords Rahmenspezifikation: Abgleiche fr Kerne aus magnetischen Oxiden in Spulen und
18、abgestimmten bertragern This European Standard was approved by the CENELEC Electronic Components Committee (CECC) on 20 November 1991. The text of this standard consists of the text of CECC 25400 Issue 1 1982 of the correspondingCECC Specification. CENELEC members are bound to comply with CEN/CENELE
19、C 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 standards may be obtained on application to the General Secretariat of the CECC o
20、r 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 and notified to the CECC General Secretariat has the same status as the
21、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, Switzerland and United Kingdom. The membership of the CECC is identical,
22、with the exception of the national electrotechnical committees of Greece, Iceland and Luxembourg. CECC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1
23、050 Brussels 1991 Copyright reserved to CENELEC members Ref. No. EN 125400:1991 E2 blankEN125400:1991 ii BSI 03-2000 Contents Page Foreword iii Section 1. Scope 1 Section 2. General 2.1 Related documents 1 2.2 Terminology 1 Section 3. Quality assessment procedures test and measurement conditions 3.1
24、 Visual inspection 1 3.1.1 General 1 3.1.2 Chips 1 3.1.3 Cracks 1 3.1.4 Flash (fins) 1 3.2 Dimensions 1 3.3 Range of inductance adjustment (upper/lower limit) 1 3.3.1 Measuring procedures 1 3.3.2 Assessment of results 1 3.4 Mechanical testing 1 3.5 Contribution of the adjusting device to the core in
25、stability 1 Section 4. Additional information 2EN125400:1991 BSI 03-2000 iii Foreword The CENELEC Electronic Components Committee (CECC) is composed of thosemember countries of the European Committee for Electrotechnical Standardization (CENELEC) who wish to take part in a harmonized System forelect
26、ronic components of assessed quality. The object of the System is to facilitate international trade by the harmonization of specifications and quality assessment procedures for electronic components, and by the grant of an internationally recognized Mark, of Certificate of Conformity. The components
27、 produced under the System are thereby accepted by all member countries without further testing. This specification has been formally approved by the CECC, and has been prepared for those countries taking part in the System who wish to issue national harmonized specifications for ADJUSTERS USED WITH
28、 MAGNETIC OXIDE CORES FOR USE IN INDUCTORS AND TUNED TRANSFORMERS. It should be read in conjunction with document CECC00100: Basic Rules (1974). Preface This sectional specification (SS) was prepared by CECC Working Group 12: “Magnetic Components”. It is one of a series of SS all relating to the gen
29、eric specification (GS) printed asCECC 25000. In accordance with the requirements of document CECC00100, it is based, wherever possible, on the Recommendations of the International Electrotechnical Commission and in particular on IEC 367: Cores for inductors and transformers for telecommunications.
30、The text of this SS was circulated to the CECC for voting in the document indicated below and was ratified by the CECC Management Committee for printing as a CECC specification: Document Voting Date Report on the voting CECC (Secretariat) 968 July 1980 CECC (Secretariat) 1079iv blankEN125400:1991 BS
31、I 03-2000 1 Section 1. Scope This SS prescribes the characteristics and inspection requirements for adjusters of assessed quality for use with magnetic oxide (ferrite) cores intended for inductors and transformers in tuned circuits for professional and industrial applications. It prescribes the appr
32、opriate test methods from the GS CECC25000 for use in detail specifications (DS) derived from this SS, and contains the test schedules to be used in the preparation of such DS. The blank detail specification (BDS) CECC25401 prescribes the information to be given in the test schedule in DS derived fr
33、om this SS. Adjusters complying with this specification are intended for use with cores made by the same manufacturer and may be used with cores complying with CECC 25100. Their use enables the inductance of an inductor or transformer to be adjusted for tuning. Section 2. General 2.1 Related documen
34、ts Documents CECC 25000, CECC 25100. 2.2 Terminology The definitions in 4.9.2 of CECC25000 shall apply. Section 3. Quality assessment procedures test and measurement conditions These tests shall be carried out in accordance with and as an extension of the measuring methods presented in Section4of CE
35、CC 25000. 3.1 Visual inspection 3.1.1 General An adjuster may consist of a magnetic (ferrite or carbonyl iron) tube or rod having a moulded thermo-plastic carrier. Due to the method of manufacture and physical nature of the materials used, adjusters can be expected to exhibit some degree of physical
36、 imperfection other than the dimensional and geometric form imperfections permitted by the specified tolerances. 3.1.2 Chips Chips in the magnetic part are permitted, providing they do not cause the adjuster to fail to meet the specified electrical and dimensional limits. However, a permissible chip
37、 may take a dimension locally outside its tolerance. 3.1.3 Cracks Cracks other than minor surface ones in the magnetic part are not permitted. 3.1.4 Flash (fins) Flash on the magnetic part and plastic carrier is permissible provided that the material of the flash does not become readily dissociated
38、from the adjuster and does not interfere with its proper function. 3.2 Dimensions Outline dimensions should be given for information purposes only. Dimensions need not be specified in the test schedule because the adjusting torque and adjustment range are an indirect inspection of dimensions. 3.3 Ra
39、nge of inductance adjustment (upper/lower limit) 3.3.1 Measuring procedure The adjuster shall be tested in accordance with 4.9.5 of CECC25000. The reference cores used for the tests shall be defined in the DS. After the set of measurements, the used adjuster shall be discarded. 3.3.2 Assessment of r
40、esults The results shall be assessed in accordance with4.9.6 of CECC25000. It shall be verified that the upper and lower limits of the adjustment range specified can be obtained, that between these limits the slope of the curve does not reverse and that the minimum and maximum slope at any point in
41、the adjustment range shall comply with any stated requirement. 3.4 Mechanical testing 3.4.1 The adjusting torque measured on a set shall be in accordance with the specified value. 3.4.2 Screw-type adjusters tested to 4.11.2 of CECC25000 shall withstand the specified torque without damage. 3.4.3 Spec
42、imens shall be selected in accordance with4.9.4 of CECC25000. 3.5 Contribution of the adjusting device to the core instability The test for core instability shall be in accordance with 4.1.4 of CECC 25000. 3.6 A table for quality conformance inspection is given in the BDS CECC 25401.EN125400:1991 2
43、BSI 03-2000 Section 4. Additional information Additional information in the form of curves and graphs may be given by the manufacturers. It shall not be used for inspection purposes.BSEN125400:1993 BSI 03-2000 Publications referred to See national foreword.BS EN 125400:1993 CECC 25400: 1982 BSI 389
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