EN 61248-5:1997

SLOVENSKI STANDARD
01-september-2002
Transformers and inductors for use in telecommunication and electronic
equipment - Part 5: Sectional specification for pulse transformers on the basis of
the capability approval procedure (IEC 61248-5:1996)
Transformers and inductors for use in electronic and telecommunication equipment --
Part 5: Sectional specification for pulse transformers on the basis of the capability
approval procedure
Transformatoren und Drosseln für elektronische und nachrichtentechnische
Einrichtungen -- Teil 5: Rahmenspezifikation für Impulstransformatoren mit
Befähigungsanerkennung
Transformateurs et inductances destinés aux équipements électroniques et de
télécommunications -- Partie 5: Spécification intermédiaire pour les transformateurs
d'impulsions sur la base de la procédure de l'agrément de savoir-faire
Ta slovenski standard je istoveten z: EN 61248-5:1997
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
1248-5
INTERNATIONAL
QC 260400
STANDARD
Première édition
First edition
1996-06
Transformateurs et inductances destinés
aux équipements électroniques et de
télécommunications –
Partie 5:
Spécification intermédiaire pour les
transformateurs d'impulsions sur la base
de la procédure de l'agrément de savoir-faire
Transformers and inductors for use in electronic
and telecommunication equipment –
Part 5:
Sectional specification for pulse transformers
on the basis of the capability approval procedure
© CEI 1996 Droits de reproduction réservés — Copyright — all rights reserved
of this publication may be reproduced or utilized in
Aucune partie de cette publication ne peut être reproduite ni No part
utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et including photocopying and microfilm, without permission
les microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher.
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève, Suisse
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission PRICE CODE
IEC MewAyHapoatfaa 3netrrporexHH4ecKae KmeiccuR
voir catalogue en vigueur • Pour prix,
•
logue
For price, see current cata
- 3 -
1248-5 © I EC:1996
CONTENTS
Page
FOREWORD 5
Clause
1 Scope
2 Normative references
3 Preparation of the detail specification
3.1 General
11 3.2 Ratings and characteristics
11 3.3 Outline drawings and winding schematic diagram
13 4 Inspection requirements to be listed in the detail specification
4.1 Conformance inspection
4.2 Design verification
5 Detail specification
Blank detail specification
1248-5 © I EC:1996 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
TRANSFORMERS AND INDUCTORS FOR USE IN ELECTRONIC AND
EQUIPMENT —
TELECOMMUNICATION
Part 5: Sectional specification for pulse transformers
on the basis of the capability approval procedure
FOREWORD
The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
1)
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.
The formal decisions or agreements of the IEC on technical matters, express as nearly as possible an
2)
international consensus of opinion on the relevant subjects since each technical committee has
representation from all interested National Committees.
are published in the
The documents produced have the form of recommendations for international use and
3)
form of standards, technical reports or guides and they are accepted by the National Committees in that
sense.
In order to promote international unification, IEC National Committees undertake to apply IEC International
4)
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.
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
5)
equipment declared to be in conformity with one of its standards.
Attention is drawn to the possibility that some of the elements of this International Standard may be the
6)
subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 1248-5 has been prepared by IEC technical committee 51:
Magnetic components and ferrite materials.
This standard is intended for use in the IEC Quality Assessment System for Electronic
Components (IECQ).
The operation of the IECQ is governed by IEC QC 001001 and IEC QC 001002. Specifi-
cations written for components assessed under this scheme, and their use in the scheme,
are the subject of IEC Guide 102.
The text of this standard is based on the following documents:
Report on voting
FDIS
51 /431 /RV D
51 /402/FDIS
Full information on the voting for the approval of this standard can be found in the report
on voting indicated in the above table.
The QC number that appears on the front cover of this publication is the specification
number in the IECQ System.
- 7 -
©IEC:1996 1248-5
TRANSFORMERS AND INDUCTORS FOR USE IN ELECTRONIC AND
TELECOMMUNICATION EQUIPMENT —
Part 5: Sectional specification for pulse transformers
on the basis of the capability approval procedure
1 Scope
This part of IEC 1248 specifies how to prepare detail specifications for pulse transformers
to be released under the terms of IEC 1248-1 (QC 260000) capability approval. It includes
a blank detail specification (BDS), which shows the format and indicates which tests are
considered to be appropriate to this type of component, although the final selection of
tests to be included in the inspection schedule is at the discretion of the specification
writer. It also lists appropriate ratings and characteristics.
The components covered by this part of IEC 1248 are essentially concerned with
-directional pulses and the transfer of the energy and signals of these pulses from one
uni
section of a circuit to another. Whilst no specific dividing line is practicable, low power
pulse transformers are regarded as transferring information and high power pulse trans-
formers are regarded as transferring power.
2 Normative references
The following normative documents contain provisions, which, through reference in this
text, constitute provisions of this part of IEC 1248. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
of IEC 1248 are encouraged to investigate the possibility of
agreements based on this pa rt
applying the most recent editions of the normative documents listed below. Members of
IEC and ISO maintain registers of currently valid International Standards.
Electronic components - Specification structures for quality assess-
IEC Guide 102: 1989,
ment (Qualification approval and capability approval)
Basic rules of the IEC Quality Assessment System for Electronic
IEC QC 001001: 1986,
Components (IECQ)
Amendment 2 (1994)
Rules of procedure of the IEC Quality Assessment System for
IEC QC 001002: 1986,
Electronic Components (IECQ)
Amendment 2 (1994)
IEC QC 001004: Specifications list
Register of firms, products and services approved under the IECQ
IEC QC 001005:
System, including ISO 9000
IEC 68-2: Environmental testing - Part 2: Tests
rt 2: Tests - Test Fc and guidance: Vibration
IEC 68-2-6: 1982, Environmental testing - Pa
(sinusoidal)
1248-5 © IEC:1996 – 9 –
Environmental testing – Part 2: Tests – Test N: Change of temperature
1EC 68-2-14: 1984,
Amendment 1 (1986)
IEC 68-2-20: 1979, Environmental testing – Part 2: Tests – Test T: Soldering
Amendment 2 (1987)
Environmental testing – Part 2: Tests – Test U: Robustness of ter-
IEC 68-2-21: 1983,
minations and integral mounting devices
Amendment 2 (1991), Amendment 3 (1992)
Environmental testing – Part 2: Tests – Test Ea and Guidance: Shock
IEC 68-2-27: 1987,
Environmental testing – Part 2: Tests – Test Eb and Guidance: Bump
IEC 68-2-29: 1987,
Sampling plans and procedures for inspection by attributes
IEC 410: 1973,
Transformers and inductors for use in electronic and telecommunication
IEC 1007: 1994,
equipment – Measuring methods and test procedures
Transformers and inductors for use in electronic and telecommunication
IEC 1248-1: 1996,
1: Generic specification
equipment – Part
Technical drawings – General principles of presentation
ISO 128: 1982,
Technical drawings – Dimensioning – General principles, definitions,
ISO 129: 1985,
methods of execution and special indications
3 Preparation of the detail specification
This standard is intended to be used for the preparation of detail specifications for pulse
transformers released under the terms of IEC 1248-1 (QC 260000) capability approval
procedure.
It is intended for use by the following originators:
a customer wishing to procure pulse transformers that are within the scope of the
a)
approved capability of his supplying component manufacturer, for example for detail
specifications (DS);
a capability-approved manufacturer of pulse transformers wishing to prepare specifi-
b)
cations for his own products which are within the scope of his capability approval.
NOTES
The detail specification should take the form of the BDS shown in clause 5, particularly in respect of
the front page format and, in principle, in respect of the presentation of the inspection requirements.
2 Unless otherwise specified, all the tests shown in the BDS are taken from IEC 1007. Those shown
underlined concern operating characteristics of fundamental importance, and it is strongly recommended
that these are selected by the specification writer for inclusion in the detail specification. The tests shown
in plain type are listed for the convenience of the specification writer, and tests should be selected from
them according to the particular application of the component.
The specification writer may specify tests and sampling levels different from, less than, or additional to
those given in the BDS.
- 11 -
1248-5 © I EC:1996
3.1 General
Where additional tests of a type not defined or invoked in this specification or
3.1.1
1007 are required, these shall be fully specified in the detail specification.
IEC
Any tests considered as being destructive shall be so denoted in the test schedule
3.1.2
by the addition of the notation "(D)".
NOTE - The use of this notation is not illustrated in the BDS.
Tests shall be grouped in the schedule according to the level of sampling required
3.1.3
4.1 b)), in the order of testing required. Where 100 %
and, unless otherwise indicated (see
testing is not required, inspection levels and acceptable quality levels shall be selected
from IEC 410.
The completed detail specification shall be allocated a component identity number
3.1.4
and issue status by the originator.
NOTES
This number is chosen by the originator (manufacturer or customer) within his own system. It is thus
not subject to any external rules or codification.
2 In the special case of a manufacturer's detail specification for a standard catalogue item which the
manufacturer wishes to be listed in IEC QC 001004, the national committee will allocate an appropriate
number from its register.
A number allocated by the component manufacturer shall be additionally included
3.1.5
in the detail specification, comprising this specification number, his factory identification
code letters and a unique number within his registration system, for example
QC 260400/PQR/1234.
NOTE - After a detail specification has been allocated the manufacturer's reference number in
accordance with 3.1.5, it is to be considered a contractual part of the order. Copies of all such detail
specifications are to be retained by the manufacturer's chief inspector.
3.2 Ratings and characteristics
3.2.1 Ratings
In the case of customer-originated detail specifications, customer and manufacturer
agreement shall be obtained on the ratings to be ascribed to the component in the detail
specification. These ratings shall not exceed the scope of the manufacturer's capability
approval (see also 1.12 of IEC 1248-1).
3.2.2 Characteristics
A customer shall prescribe in the detail specification any characteristic required for a
component.
3.3 Outline drawings and winding schematic diagram
The detail specification shall incorporate a drawing of the transformer showing
3.3.1
important features, such as those dimensions affecting interchangeability, restrictions on
mounting, and marking requirements.

1248-5 © IEC:1996 - 13 -
3.3.2 The detail specification shall incorporate a schematic diagram showing all
windings, screens, taps and phasings, and giving termination identification.
4 Inspection requirements to be listed in the detail specification
4.1
Conformance inspection
The detail specification shall incorporate the following notes:
a) sampling inspections shall be carried out in accordance with IEC 410, normal
inspection;
b) tests in a group may be carried out in any order, except w
...