EN 61021-2:1997

Laminated core packages for transformers and inductors for use in telecommunication and electronic equipment - Part 2: Electrical characteristics for cores using YEE 2 laminations

Specifies the electrical characteristics of laminated core packages using YEE 2 laminations according to IEC 60740. It also gives the marking and packaging requirements.

Kernblechpakete für Transformatoren und Drosseln für nachrichtentechnische und elektronische Einrichtungen - Teil 2: Elektrische Kenngrößen für Kerne mit YEE 2-Blechen

Noyaux en tôles découpées pour transformateurs et inductances destinés aux équipements électroniques et de télécommunications - Partie 2: Caractéristiques électriques pour noyaux utilisant des tôles YEE 2

Spécifie les caractéristiques électriques de noyaux en tôles découpées utilisant des tôles YEE 2 conformément à la CEI 60740. Donne également les prescriptions de marquage et de conditionnement.

Laminated core packages for transformers and inductors for use in telecommunication and electronic equipment - Part 2: Electrical characteristics for cores using YEE 2 laminations (IEC 61021-2:1995)

General Information

• Status: Withdrawn
• Publication Date: 08-Apr-1997
• Withdrawal Date: 30-Nov-1997
• ICS: 29.100.10 - Magnetic components
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: CLC/SR 51 - Magnetic components and ferrite materials
• Drafting Committee: IEC/TC 51 - IEC_TC_51
• Parallel Committee: IEC/TC 51 - IEC_TC_51
• Ref Project: SIST EN 61021-2:2002 - Laminated core packages for transformers and inductors for use in telecommunication and electronic equipment -- Part 2: Electrical characteristics for cores using YEE 2 laminations

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2002
Laminated core packages for transformers and inductors for use in
telecommunication and electronic equipment - Part 2: Electrical characteristics for
cores using YEE 2 laminations (IEC 61021-2:1995)
Laminated core packages for transformers and inductors for use in telecommunication
and electronic equipment -- Part 2: Electrical characteristics for cores using YEE 2
laminations
Kernblechpakete für Transformatoren und Drosseln für nachrichtentechnische und
elektronische Einrichtungen -- Teil 2: Elektrische Kenngrößen für Kerne mit YEE 2-
Blechen
Noyaux en tôles découpées pour transformateurs et inductances destinés aux
équipements électroniques et de télécommunications -- Partie 2: Caractéristiques
électriques pour noyaux utilisant des tôles YEE 2
Ta slovenski standard je istoveten z: EN 61021-2:1997
ICS:
29.100.10 Magnetne komponente Magnetic components
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
61021-2
INTERNATIONAL
Première édition
STANDARD
First edition
1995-05
Noyaux en tôles découpées pour transformateurs
et inductances destinés aux équipements
électroniques et de télécommunications —
Partie 2:
Caractéristiques électriques pour noyaux
utilisant des tôles YEE 2
Laminated core packages for transformers and
inductors for use in telecommunication and
electronic equipment —
Part 2:
Electrical characteristics for cores using YEE 2
laminations
© IEC 1995 Droits de reproduction réservés — Copyright - all rights reserved
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copie les microfilms, sans de l'éditeur.
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1021-2 ©I EC: 1995 - 3 -
CONTENTS
Page
FOREWORD 5
Clause
1 Scope 7
2 Normative references 7
3 Definitions 9
4 Electrical characteristics 9
5 Operating temperature range 17
6 Electrical tests 17
6.1 General test conditions 17
6.2 Test procedure 17
6.3 Calculation 21
7 Marking 23
7.1 Cores 23
7.2 Package 25
8 Packaging 25
1021-2 © I EC: 1995 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
LAMINATED CORE PACKAGES FOR
TRANSFORMERS AND INDUCTORS FOR USE IN
TELECOMMUNICATION AND ELECTRONIC EQUIPMENT -
Part 2: Electrical characteristics for
cores using YEE 2 laminations
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
International Standard IEC 1021-2 has been prepared by IEC technical committee 51:
Magnetic components and ferrite materials.
The text of this standard is based on the following documents:
DIS Report on voting
51/354/DIS 51 /388/RVD
Full information on the voting for the approval of this standard can be found in the report
on voting indicated in the above table.
IEC 1021 consists of the following parts, under the general title: Laminated core packages
for transformers and inductors for use in telecommunication and electronic equipment:
- Part 1: 1990, Dimensions;
- Part 2: 1994, Electrical characteristics for cores using YEE 2 laminations.

1021-2 © I EC: 1995 - 7 -
LAMINATED CORE PACKAGES FOR
TRANSFORMERS AND INDUCTORS FOR USE IN
TELECOMMUNICATION AND ELECTRONIC EQUIPMENT -
Part 2: Electrical characteristics for
cores using YEE 2 laminations
1 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 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 AL.
Although laminated core packages are produced with or without 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 L values to be achieved.
NOTE — The electrical characteristics of laminated core packages without an air gap is a matter for
agreement between 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 revision, and pa
rties to
agreements based on this pa rt
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,
International Electrotechnical Vocabulary (IEV) - Chapter 221:
Magnetic materials and components
Amendment 1 (1993)
IEC 68-1: 1988, Environmental testing - Part 1: General and guidance
IEC 317-4: 1990,
Specifications for particular types of winding wires - Part 4: Solderable
polyurethane enamelled round copper wires, class 130
IEC 404-8-6: 1986,
Magnetic materials - Part 8: Specifications for individual materials -
Section six: Soft magnetic metallic materials
IEC 740: 1982,
Laminations for transformers and inductors for use in telecommunication
and electronic equipment
1021-2 © I EC: 1995 - 9 -
IEC 1021-1: 1990,
Laminated core packages for transformers and inductors used in
telecommunication and electronic equipment - Pa
rt 1: 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, the following definition applies:
A:
inductance factor The inductance L of a specified coil placed on a given core in a
L
specified position, divided by the square of the number of turns N.
L
A -
L
N2
4 Electrical characteristics
The inductance factors of laminated core packages and their tolerances shall be as
specified in tables 1, 2 and 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.
NOTES
L
1 In order to measure the A values correctly, it is necessary for the mating surfaces to be clean and
corrosion-free, and assembled in perfect alignment.
2 The specified A L values apply in the absence of premagnetization (d.c. bias). The deviations from t
...