IEC 61811-50:2002

Electromechanical all-or-nothing relays - Part 50: Sectional specification - Electromechanical all-or-nothing telecom relays of assessed quality

IEC 61811-50:2002 Is a sectional specification applicable to electromechanical all-or-nothing telecom relays of assessed quality. Selects the appropriate methods of test to be used in detail specifications and contains basic test schedules to be used in the preparation of such specifications.

Relais électromécaniques de tout-ou-rien - Partie 50: Spécification intermédiaire - Relais électromécaniques de tout-ou-rien télécom sous assurance de la qualité

L'IEC 61811-50:2002 est une spécification intermédiaire applicable aux relais électromécaniques de tout-ou-rien télécom sous assurance de la qualité. Les relais conformes à la présente norme sont mis en oeuvre dans des applications de télécommunication. Cependant, en tant que relais sur circuits imprimés, ils conviennent également pour d'autres types d'applications, par exemple industrielles. La présente norme sélectionne dans la CEI 61810-7 et dans d'autres documents, les méthodes d'essai appropriées à utiliser dans les spécifications particulières dérivées de la présente spécification et contient les programmes d'essais de base qui sont à utiliser lors de la préparation de telles spécifications. Les programmes d'essais détaillés sont donnés dans les spécifications particulières cadres complémentaires à la présente spécification. Cette deuxième édition de la CEI 61811-50 annule et remplace la première édition parue en 1997 dont elle constitue une révision technique.

General Information

• Status: Replaced
• Publication Date: 11-Mar-2002
• ICS: 29.120.70 - Relays
• Technical Committee: TC 94 - Electrical relays
• Drafting Committee: MT 5 - TC 94/MT 5
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 28-Jan-2015

Relations

• Replaced By: IEC 61811-1:2015 - Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification
• Effective Date: 05-Sep-2023
• Revises: IEC 61811-50:1997 - Electromechanical all-or-nothing relays - Part 50: Sectional specification: Electromechanical all-or-nothing telecom relays of assessed quality
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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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: [phone] Telefax: [phone] E-mail: [e-mail]  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 conversion
IEC 61810-1:1998, Electromechanical non-specified time all-or-nothing relays – Part 1:
General requirements
IEC 61810-5:1998, Electromechanical non-specified time all-or-nothing relays – Part 5:
Insulation co-ordination
IEC 61810-7:1997, Electromechanical all-or-nothing relays – Part 7: Test and measurement
procedures
– 6 – 61811-50  IEC:2002(E)
IEC 61811-1:1999, Electromechanical non-specified time all-or-nothing relays of assessed
quality – Part 1: Generic specification
QC 001002-3:1998, Rules of Procedure of the IEC Quality Assessment System for Electronic
Components (IECQ) – Part 3: Approval Procedures
ISO 8601:2000, Data elements and interchange formats – Information interchange –
Representation of dates and times
ISO 9001:2000, Quality systems – Model for quality assurance in design, development,
production, installation and servicing
CECC 00016:1990, Basic requirements for the use of statistical process control (SPC) in the
CECC system
CECC 00800:1986, Code of practice on the use of the ppm approach in association with
the CECC system
1.3 Terms and definitions
For the purpose of this part of IEC 61811, the terms and definitions given in IEC 61810-7, as
well as the following apply:
1.3.1
types of relays
types of relays as defined in IEC 61810-7
NOTE The most frequent types of electromechanical all-or-nothing telecom relays are the following ones:
– monostable: non-polarized;
– monostable: polarized;
– bistable: polarized.
1.3.2
types of contacts
a) change-over break-before-make contact
change-over contact, one contact circuit of which breaks before the other makes
b) change-over make-before-break contact
change-over contact, one contact circuit of which makes before the other breaks
1.3.3
contact fault and contact failure
a) contact fault due to contact-circuit resistance
the occurrence is assumed when the contact-circuit resistance of a closed contact exceeds
the maximum value stated in the detail specification
b) contact fault due to non-opening of the contact circuit (e.g. contact sticking)
the occurrence due to the fact that the contact does not open is assumed when the resistance
of an open contact assembly falls below the specified minimum value stated in the detail
specification
c) contact failure
the occurrence is assumed when the number of faults due to contact-circuit resistance or/and
of faults due to non-opening of the contact circuit exceeds the number of faults stated in the
detail specification, with reference to a single tested contact

61811-50 © IEC:2002(E) – 7 –
1.3.4
relay fault, relay failure and relay defect
a) relay fault
the state of a relay characterized by the inability to perform a required function. A fault
persists for a limited time after which the relay recovers the ability to perform a required
function without being subjected to any corrective maintenance
b) relay failure
failure occurs when the relay is unable to carry out its required function
c) relay defect
any deviation of a characteristic of a relay from the requirements
NOTE 1 The requirements may or may not be expressed in the form of a specification.
NOTE 2 A defect may or may not affect the ability of a relay to perform a required function.
d) defective relay
relay containing one or more defects
1.4 Preferred values
The following Subclauses contain preferred values applicable to electromechanical all-or-
nothing telecom relays.
1.4.1 Rated coil voltages
Preferred values d.c.: 1,5; 3; 4,5; 5; 6; 9; 12; 24; 48 or 60
...

IEC 61811-50 ®
Edition 2.0 2002-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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 sous assurance de la qualité

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IEC 61811-50 ®
Edition 2.0 2002-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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 sous assurance de la qualité

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 29.120.70 ISBN 978-2-8322-1547-0

– 2 – IEC 61811-50:2002 © IEC 2002
CONTENTS
FOREWORD . 3

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 . 11
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 . 13
5 Relay reliability - Failure rate data . 13

Annex A (informative) Data base for failure rates . 18

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 bilingual version (2014-04) corresponds to the English version, published in 2002-03.
This second edition of IEC 61811-50 cancels and replaces the first edition published in 1997
and constitutes a technical revision.

– 4 – IEC 61811-50:2002 © IEC 2002
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 French version of this standard has not been voted upon.
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.
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.
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 r
...