1、BRITISH STANDARD BS EN 61021-2:1997 IEC 1021-2: 1995 Laminated core packages for transformers and inductors for use in telecommunication and electronic equipment Part 2: Electrical characteristics for cores using YEE 2 laminations The European Standard EN 61021-2:1997 has the status of a British Sta
2、ndard ICS 29.100.10; 29.180BSEN61021-2:1997 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15July 1997 BSI 09-1999 ISBN 0 580 27758 5 National foreword This British
3、 Standard is the English language version of EN 61021-2:1997. Itis identical with IEC 1021-2:1995. Attention is drawn to the fact that IEC 1021-1 has been implemented as BS7382-1:1990. The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformers, inductors, magne
4、tic 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 UK interests informed; monitor related international and
5、 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 Attention is drawn to the fact that Annex ZA lists normative references to international publications with their corresponding Eur
6、opean publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A Brit
7、ish 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 confer immunity from legal obligations. Summary of pages This document comprises a fron
8、t cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 10, an inside back cover 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 is
9、sued since publication Amd. No. Date CommentsBSEN61021-2:1997 BSI 09-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61021-2 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61021-2 April1997 ICS29.100.10; 29.180 Descriptors: Transformers and inductors, te
10、lecommunication and electronic equipment, laminated core packages, YEE 2 laminations, electrical characteristics, electrical tests, marking, packaging English version Laminated core packages for transformers and inductors foruse in telecommunication andelectronicequipment Part2:Electrical characteri
11、stics for cores using YEE2laminations (IEC 1021-2:1995) Noyaux en tles dcoupes pour transformateurs et inductances destins aux quipements lectroniques et de tlcommunications Partie 2: Caractristiques lectriques pour noyaux utilisant des tles YEE 2 (CEI 1021-2:1995) Kernblechpakete fr Transformatoren
12、 und Drosseln fr nachrichtentechnische und elektronische Einrichtungen Teil 2: Elektrische Kenngren fr Kerne mit YEE 2-Blechen (IEC 1021-2:1995) This European Standard was approved by CENELEC on 1997-03-11. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
13、 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 Central Secretariat or to any CENELEC member. This European Standard ex
14、ists 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 Central Secretariat has the same status as the official versions. CENELEC members are the national ele
15、ctrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation E
16、lectrotechnique Europisches Komitee fr Elektrotechnische 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. EN 61021-2:1997 EEN61021-2:1997 BSI 09-1999 2 Foreword The t
17、ext of the International Standard IEC 1021-2:1995, prepared by IEC TC 51, Magnetic components and ferrite materials, was submitted to the formal vote and was approved by CENELEC as EN 61021-2 on 1997-03-11 without any modification. The following dates were fixed: Annexes designated “normative” are p
18、art of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 1021-2:1995 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 3 2 Normat
19、ive references 3 3 Definitions 3 4 Electrical characteristics 3 5 Operating temperature range 7 6 Electrical tests 7 6.1 General test conditions 7 6.2 Test procedure 7 6.3 Calculation 7 7 Marking 10 7.1 Cores 10 7.2 Package 10 8 Packaging 10 Annex ZA (normative) Normative referencestointernational p
20、ublications withtheircorresponding European publications Inside back cover Figure 1 Basic circuit arrangement for thedetermination of the inductance factor 9 Figure 2 Example of core marking 10 Table 1 Inductance factors with tolerancesforcores made from oriented silicon-steel laminations (material
21、class C22 inaccordance with IEC 404-8-6) and clampedwiththe stated contact force 4 Table 2 Inductance factors with tolerances forcores made from 72 % 83 % nickel-iron alloy laminations (material class E11inaccordance with IEC 404-8-6) and clampedwith the stated contact force 5 Table 3 Inductance fac
22、tors with tolerancesforcores made from 45 % 50 % nickel-iron alloy laminations (material classE31inaccordance with IEC 404-8-6) andclamped with the stated contact force 6 Table 4 Test coil winding details 8 Table 5 Material thickness and stacking factors ! 8 Table 6 Core data with test coil winding
23、N 2voltage 9 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1997-12-01EN61021-2:1997 BSI 09-1999 3 1
24、Scope This part of IEC 1021 specifies the electrical characteristics of laminated core packages using YEE 2 laminations according to IEC 740 and, in their larger variant, according to IEC 1021-1, for cores made from specified grades of oriented silicon-steel or nickel-iron alloys. It also gives the
25、marking and packaging requirements. The main applications of these cores exclude the significant transmission of power with the consequence that the principal electrical characteristic may be expressed in terms of inductance factor A L . Although laminated core packages are produced with or without
26、an air-gap in the centre leg of the magnetic circuit, this part deals only with gaped cores, where control of the length of a designed air gap enables specified A Lvalues to be achieved. NOTEThe electrical characteristics of laminated core packages without an air gap is a matter for agreement betwee
27、n customer and manufacturer. 2 Normative references The following normative documents contains provisions which, through reference in this text, constitute provisions of this part of IEC 1021. At the time of publication, the editions indicated were valid. All normative documents are subject to revis
28、ion, and parties to agreements based on this part of IEC 1021 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 50(221):1990, Interna
29、tional Electrotechnical Vocabulary (IEV) Chapter 221: Magnetic materials and components. Amendment 1 (1993) IEC 68-1:1988, Environmental testing Part1:General and guidance. IEC 317-4:1990, Specifications for particular types of winding wires Part 4: Solderable polyurethane enamelled round copper wir
30、es, class 130. IEC 404-8-6:1986, Magnetic materials Part8:Specifications for individual materials Section6:Soft magnetic metallic materials. IEC 740:1982, Laminations for transformers and inductors for use in telecommunication and electronic equipment. IEC 1021-1:1990, Laminated core packages for tr
31、ansformers and inductors used in telecommunication and electronic equipment Part1: Dimensions. 3 Definitions For definitions of the general terms used, reference should be made to IEC 50(221). The definition of “laminated core package” is given in IEC 1021-1. For the purpose of this part of IEC 1021
32、, the following definition applies: inductance factor A Lthe inductance L of a specified coil placed on a given core in a specified position, divided by the square of the number of turns N 4 Electrical characteristics The inductance factors of laminated core packages and their tolerances shall be as
33、 specified in Table 1, Table 2 and Table 3 below for the material grades indicated, when made from the specified sheet thickness, clamped with the specified contact forces, and measured under the specified measuring conditions, using the test coils and test arrangement prescribed in clause 6. NOTE 1
34、In order to measure the A Lvalues correctly, it is necessary for the mating surfaces to be clean and corrosion-free, and assembled in perfect alignment. NOTE 2The specified A Lvalues apply in the absence of premagnetization (d.c. bias). The deviations from the specified values caused by stated value
35、s of d.c. bias is a matter for agreement between customer and manufacturer.EN 61021-2:1997 4 BSI 09-1999 Table 1 Inductance factors with tolerances for cores made from oriented silicon-steel laminations (material class C22 inaccordance with IEC 404-8-6) and clamped with the stated contact force The
36、specified A Lvalues are applicable to measurements made under the following conditions: f = 300 Hz 10 %; = 2 mT 10 % Core designation Contact force N 10 % Inductance factor A L nH Normal sheet thickness 25 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1 000 1 250 tolerance in % mm YEE 2-2dK 2,
37、5 10 10 12,5 12,5 16 16 YEE 2-3dK 4 10 10 10 12,5 12,5 16 16 YEE 2-4dK 6,3 8 8 10 10 10 12,5 12,5 16 0,1 YEE 2-5dK 10 8 8 8 8 8 10 10 12,5 16 YEE 2-6dK 16 8 8 8 8 8 10 10 10 12,5 16 YEE 2-6dKL YEE 2-8dK 25 8 8 8 8 8 10 10 10 10 12,5 16 0,1 YEE 2-8dKL YEE 2-10dK 40 8 8 8 8 8 8 8 10 10 10 12,5 0,3 YEE
38、 2-10dKL YEE 2-12dK 63 8 8 8 8 8 8 8 10 10 10 12,5 0,35 YEE 2-12dKL B EN 61021-2:1997 BSI 09-1999 5 Table 2 Inductance factors with tolerances for cores made from 72 % 83 % nickel-iron alloy laminations (material class E11inaccordance with IEC 404-8-6) and clamped with the stated contact force The s
39、pecified A Lvalues are applicable to measurements made under the following conditions: f = 300 Hz 10 %;= 2 mT 10 % Core designation Contact force N 10 % Inductance factor AL nH Nominal sheet thickness 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1 000 1 250 1 600 2 000 2 500 3 150 4 000 5 000
40、 tolerance in % mm YEE 2-2dK 2,5 12,5 16 16 20 20 25 25 0,1 YEE 2-3dK 4 12,5 12,5 16 16 20 20 25 25 YEE 2-4dK 6,3 10 12,5 12,5 12,5 16 16 20 20 25 YEE 2-5dK 10 10 10 10 12,5 12,5 12,5 16 16 20 20 25 0,2 YEE 2-6dK 16 10 10 10 10 12,5 12,5 12,5 16 16 16 20 20 25 YEE 2-6dKL YEE 2-8dK 25 10 10 10 10 10
41、12,5 12,5 12,5 16 16 16 20 25 0,1 YEE 2-8dKL YEE 2-10dK 40 10 10 10 10 10 10 10 12,5 12,5 12,5 16 16 20 25 0,2 YEE 2-10dKL YEE 2-12dK 63 10 10 10 10 10 10 10 10 12,5 12,5 12,5 16 16 20 25 0,35 YEE 2-12dKL B EN 61021-2:1997 6 BSI 09-1999 Table 3 Inductance factors with tolerances for cores made from
42、45 % 50 % nickel-iron alloy laminations (materialclassE31inaccordance with IEC 404-8-6) and clamped with the stated contact force The specified A Lvalues are applicable to measurements made under the following conditions: f = 300 Hz 10 %;= 2 mT 10 % Core designation Contact force N 10 % Inductance f
43、actor AL nH Normal sheet thickness 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1 000 1 250 1 600 2 000 2 500 tolerance in % mm YEE 2-2dK 2,5 10 12,5 12,5 16 16 0,1 YEE 2-3dK 4 10 10 10 12,5 12,5 16 16 20 YEE 2-4dK 6,3 10 10 10 12,5 12,5 16 20 YEE 2-5dK 10 8 8 8 10 10 12,5 16 20 0,2 YEE 2-6dK
44、 16 8 8 8 10 10 10 12,5 16 20 YEE 2-6dKL YEE 2-8dK 25 8 8 8 10 10 10 10 12,5 16 20 0,1 YEE 2-8dKL YEE 2-10dK 40 8 8 8 8 10 10 10 10 12,5 16 20 0,2 YEE 2-10dKL YEE 2-12dK 63 8 8 8 8 10 10 10 10 12,5 12,5 16 20 0,35 YEE 2-12dKL B EN61021-2:1997 BSI 09-1999 7 5 Operating temperature range Laminated cor
45、e packages shall be suitable for storage and continuous use in the temperature range from 40 C to + 125 C. 6 Electrical tests 6.1 General test conditions Unless otherwise specified, all tests shall be carried out at the standard atmospheric conditions for testing as recommended by IEC 68-1: Test cer
46、tificates shall state what test conditions have been used. The gap surfaces of the cores under test shall be clean and free from dust, burrs, protective finish, etc. 6.2 Test procedure The core pairs are put into the appropriate test coil, chosen from those specified in Table 4, and loaded with the
47、contact force applied perpendicularly to the mating surfaces according to Table 1 to Table 3. Care should be taken to maintain correct alignment to ensure that there is no deviation from the designed air gap. The inductance L of the assembly is measured by means of an a.c. bridge in an equivalent se
48、ries connection of the test coil in accordance with Figure 1, at an operating frequency of 300 Hz 10 %. The peak flux density in the core is adjusted to 2 mT 10 % by setting the r.m.s. voltage U 2at the winding N 2of the test coil, in accordance with the formula: where A Feis the nominal value of th
49、e effective core cross-section. The values of U 2corresponding to the necessary test conditions are given in Table 6, together with values of the parameters from which A Feis calculated: where NOTEIf d.c. bias is required for test purposes, it may apply on the winding N 3(see clause 4, note 2). 6.3 Calculation The inductance factor is calculated from the observed value of L 1from the expression temperature +15 C to 35 C relative humidity 45 % to 75 % ai
