EN 61811-50:2002

SLOVENSKI SIST EN 61811-50:2003

STANDARD
april 2003
Electromechanical all-or-nothing relays - Part 50: Sectional specification -
Electromechanical all-or-nothing telecom relays of assessed quality
ICS 29.120.70 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 61811-50
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2002
ICS 29.120.70 Supersedes EN 116500:1992
English version
Electromechanical all-or-nothing relays
Part 50: Sectional specification -
Electromechanical all-or-nothing telecom relays
of assessed quality
(IEC 61811-50:2002)
Relais électromécaniques de tout-ou-rien Elektromechanische Schaltrelais
Partie 50: Spécification intermédiaire - Teil 50: Rahmenspezifikation -
Relais électromécaniques de tout-ou-rien Elektromechanische Telekom-Relais
télécom soumis au régime d'assurance mit bewerteter Qualität
de la qualité (IEC 61811-50:2002)
(CEI 61811-50:2002)
This European Standard was approved by CENELEC on 2002-05-01. CENELEC members are bound to
comply with the 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61811-50:2002 E
Foreword
The text of document 94/144/FDIS, future edition 2 of IEC 61811-50, prepared by IEC TC 94,
All-or-nothing electrical relays, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 61811-50 on 2002-05-01.
This European Standard supersedes EN 116500:1992.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2003-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-05-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annex A is informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61811-50:2002 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61811-50:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60062 1992 Marking codes for resistors and EN 60062 1993
capacitors + A11 2001
IEC 60255-23 1994 Electrical relays EN 60255-23 1996
Part 23: Contact performance
IEC 60410 1973 Sampling plans and procedures for--
inspection by attributes
IEC 60695-2-2 1991 Fire hazard testing EN 60695-2-2 1994
Part 2: Test methods -
Section 2: Needle-flame test
IEC 61709 1996 Electronic components - Reliability - EN 61709 1998
Reference conditions for failure rates
and stress models for conversion
IEC 61810-1 1998 Electromechanical non-specified time EN 61810-1 1998
all-or-nothing relays
Part 1: General requirements
IEC 61810-5 1998 Part 5: Insulation coordination EN 61810-5 1998
IEC 61810-7 1997 Part 7: Test and measurement --
procedures
IEC 61811-1 1999 Electromechanical non-specified time EN 61811-1 1999
all-or-nothing relays of assessed quality
Part 1: Generic specification
IEC QC 001002-3 1998 IEC Quality Assessment System for--
Electronic Components (IECQ) -
Rules of Procedure
Part 3: Approval procedures
ISO 8601 2000 Data elements and interchange --
formats - Information interchange -
Representation of dates and times
ISO 9001 2000 Quality management systems EN ISO 9001 2000
Requirements
Publication Year Title EN/HD Year
CECC 00 016 1990 Basic Specification: Basic requirements--
for the use of statistical process control
(SPC) in the CECC system
CECC 00 800 1986 Code of practice on the use of the ppm--
approach in association with the CECC
system
INTERNATIONAL IEC
STANDARD
61811-50
QC 160500
Second edition
2002-03
Electromechanical all-or-nothing relays –
Part 50:
Sectional specification –
Electromechanical all-or-nothing telecom
relays of assessed quality
Relais électromécaniques de tout-ou-rien –
Partie 50:
Spécification intermédiaire –
Relais électromécaniques de tout-ou-rien télécom
soumis au régime d'assurance de la qualité
 IEC 2002  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
S
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 61811-50  IEC:2002(E)
CONTENTS
FOREWORD.4
1 General .5
1.1 Scope.5
1.2 Normative references .5
1.3 Terms and definitions .6
1.4 Preferred values.7
1.5 Marking and documentation.8
2 Quality assessment procedures.9
2.1 Primary stage of manufacture.9
2.2 Structurally similar relays .9
2.3 Subcontracting .9
2.4 Qualification approval procedures .9
2.5 Quality conformance inspection.9
2.6 Test schedule.10
2.7 Order of tests .10
3 Preparation of blank detail and detail specifications.10
4 Test schedule.12
4.1 Test sequence.12
4.2 Types of relays, based upon environmental protection (relay technology RT) .12
4.3 Categories of application of contacts .12
4.4 Notes relative to Table 1 .12
5 Relay reliability - Failure rate data .13
Annex A (informative) Data base for failure rates.18

61811-50 © IEC:2002(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMECHANICAL ALL-OR-NOTHING RELAYS –
Part 50: Sectional specification –
Electromechanical all-or-nothing telecom relays
of assessed quality
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 co-operation 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 express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, 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.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61811-50 has been prepared by IEC technical committee 94:
All-or-nothing electrical relays.
This second edition of IEC 61811-50 cancels and replaces the first edition published in 1997
and constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
94/144/FDIS 94/158/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.
The QC number that appears on the front cover of this publication is the specification number
in the IEC Quality Assessment System for Electronic Components (IECQ).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.

– 4 – 61811-50  IEC:2002(E)
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61811-50 © IEC:2002(E) – 5 –
ELECTROMECHANICAL ALL-OR-NOTHING RELAYS –
Part 50: Sectional specification –
Electromechanical all-or-nothing telecom relays
of assessed quality
1 General
1.1 Scope
This part of IEC 61811 is a sectional specification and applies to electromechanical all-or-
nothing telecom relays of assessed quality. Relays according to this standard are provided for
operation in telecommunication applications. However, as electromechanical all-or-nothing
relays, they are also suitable for particular industrial and other applications.
This standard selects from IEC 61810-7 and other sources the appropriate methods of test to
be used in detail specifications derived from this specification, and contains basic test
schedules to be used in the preparation of such specifications. Detailed test schedules are
contained in the blank detail specifications supplementary to this specification.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60062:1992, Marking codes for resistors and capacitors
IEC 60255-23:1994, Electrical relays – Part 23: Contact performance
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 60695-2-2:1991, Fire hazard testing – Part 2: Test methods – Section 2: Needle-flame test
IEC 61709:1996, Electronic components – Reliability – Reference conditions for failure rates
and stress models for con
...