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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 Standard BS EN 125400:1993 This British Standard, having been prepared under the direction of the Electronic Components Standards Committee, was published under the authority of the Board of BSI and comes into effect on 28 September 1984 BSI 03-2000 The following BSI reference
3、s relate to the work 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 E
4、CL/20 upon which 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.Da
5、te of issueComments 7579February 1993 Indicated by a sideline in the margin BS EN 125400:1993 BSI 03-2000i Contents Page Committees responsibleInside front cover National forewordii Forewordiii Text of CECC 254001 Publications referred toInside back cover BS EN 125400:1993 ii BSI 03-2000 National fo
6、reword This 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 u
7、sed with 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 BS EN 125
8、400 and any reference to BS CECC 25400 should be read as a reference to BS EN 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 deviat
9、ion. Some terminology 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. Cr
10、oss-references. The British Standard which implements CECC 00100 is BS 9000 “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 StandardsCorresponding Briti
11、sh Standards IEC 367BS 5938 Cores for inductors and transformers for telecommunications IEC 367-1:1971aPart 1:1980 Methods of measurement (Identical) IEC 367-2:1974aPart 2:1980 Guide for drafting performance specifications (Identical) CECC 25000:1976BS CECC 25000:1977 Specification for harmonized sy
12、stem of quality assessment for electronic components: Generic specification: Inductor and transformer cores for telecommunications (Identical) CECC 25100:1976BS CECC 25100:1977 Specification for harmonized system of quality assessment for electronic components: Sectional specification: Magnetic oxid
13、e cores for inductor applications (Identical) CECC 25401:1982BS 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)
14、a Individual Parts not referred to in the text. BS EN 125400:1993 BSI 03-2000iii 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
15、confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN title page, page 2, the CECC title page, pages ii to iv, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright da
16、te) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. iv blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 125400 December 1991 Descriptors: Quality, electronic components, adjusters English version Sectional Specification: Ad
17、justers used 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
18、 Spulen und 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 corresponding CECC Specification. CENELEC members are bound to comply wi
19、th 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 standards may be obtained on application to the General Secretariat
20、of the CECC 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 and notified to the CECC General Secretariat has the same s
21、tatus as the 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 i
22、s identical, 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 Sta
23、ssart 35, B-1050 Brussels 1991 Copyright reserved to CENELEC members Ref. No. EN 125400:1991 E 2 blank EN 125400:1991 ii BSI 03-2000 Contents Page Forewordiii Section 1. Scope1 Section 2. General 2.1Related documents1 2.2Terminology1 Section 3. Quality assessment procedures test and measurement cond
24、itions 3.1Visual inspection1 3.1.1General1 3.1.2Chips1 3.1.3Cracks1 3.1.4Flash (fins)1 3.2Dimensions1 3.3Range of inductance adjustment (upper/lower limit)1 3.3.1Measuring procedures1 3.3.2Assessment of results1 3.4Mechanical testing1 3.5Contribution of the adjusting device to the core instability1
25、Section 4. Additional information2 EN 125400:1991 BSI 03-2000iii Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the European Committee for Electrotechnical Standardization (CENELEC) who wish to take part in a harmonized System for electronic comp
26、onents 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 produced
27、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 MAGNETIC
28、OXIDE CORES FOR USE IN INDUCTORS AND TUNED TRANSFORMERS. It should be read in conjunction with document CECC 00100: 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 generic spec
29、ification (GS) printed as CECC 25000. In accordance with the requirements of document CECC 00100, 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. The tex
30、t 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: DocumentVoting DateReport on the voting CECC (Secretariat) 968July 1980CECC (Secretariat) 1079 iv blank EN 125400:1991 BSI 03-200
31、01 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 appropriate t
32、est methods from the GS CECC 25000 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) CECC 25401 prescribes the information to be given in the test schedule in DS derived from this
33、 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 documents Docu
34、ments CECC 25000, CECC 25100. 2.2 Terminology The definitions in 4.9.2 of CECC 25000 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 Section 4 of CECC 2
35、5000. 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 imp
36、erfection 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 may
37、 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 from
38、 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 Range
39、of inductance adjustment (upper/lower limit) 3.3.1 Measuring procedure The adjuster shall be tested in accordance with 4.9.5 of CECC 25000. 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 resu
40、lts The results shall be assessed in accordance with 4.9.6 of CECC 25000. 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 t
41、he 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 CECC 25000 shall withstand the specified torque without damage. 3.4.3 Spec
42、imens shall be selected in accordance with 4.9.4 of CECC 25000. 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. EN 125400:199
43、1 2 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. BS EN 125400:1993 BSI 03-2000 Publications referred to See national foreword. BS EN 125400:1993 CECC 25400: 1982
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