IEC 63522-10:2025
(Main)Electrical relays - Tests and measurements - Part 10: Heating
Electrical relays - Tests and measurements - Part 10: Heating
IEC 63522-10:2025 is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of DUTs to perform under expected conditions of transportation, storage and all aspects of operational use.
This document defines a standard test method for heating.
Relais électriques - Essais et mesurages - Partie 10: Échauffement
IEC 63522-10:2025 traite des essais ainsi que des sévérités et conditions appropriées pour les mesurages et essais destinés à évaluer l'aptitude des DUT (devices under test - dispositifs soumis à l’essai) à fonctionner dans les conditions prévues de transport, de stockage et dans tous les aspects de leur utilisation opérationnelle.
Le présent document définit une méthode d'essai normalisée pour l'échauffement.
General Information
Standards Content (Sample)
IEC 63522-10 ®
Edition 1.0 2025-10
INTERNATIONAL
STANDARD
Electrical relays - Tests and measurements -
Part 10: Heating
ICS 29.120.70 ISBN 978-2-8327-0684-8
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CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Test procedure . 4
4.1 Purpose . 4
4.2 Procedure . 5
4.2.1 Set-up . 5
4.2.2 Procedure . 5
4.2.3 Terminals . 6
4.3 Conditions to be specified. 8
5 Evaluation . 8
5.1 General . 8
5.1.1 Relay coil . 8
5.1.2 Terminal . 8
5.2 Test report . 9
Annex A (normative) Heating test arrangement . 10
Bibliography . 11
Figure A.1 – Test arrangement . 10
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrical relays - Tests and measurements -
Part 10: Heating
FOREWORD
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IEC 63522-10 have been prepared by IEC technical committee 94: Electrical relays. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
94/1138/FDIS 94/1167/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of IEC 63522 series, published under the general title Electrical relays – Tests
and measurements, can be found on the IEC website.
This International Standard is to be used in conjunction with IEC 63522-0:─ .
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
___________
Under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
1 Scope
This part of IEC 63522 is used for testing along with the appropriate severities and conditions
for measurements and tests designed to assess the ability of DUTs to perform under expected
conditions of transportation, storage and all aspects of operational use.
This document defines a standard test method for heating.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 60998-1, Connecting devices for low-voltage circuits for household and similar purposes -
Part 1: General requirements
IEC 60999-1, Connecting devices - Electrical copper conductors – Safety requirements for
screw-type and screwless-type clamping units - Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 60999-2, Connecting devices - Electrical copper conductors - Safety requirements for
screw-type and screwless-type clamping units - Part 2: Particular requirements for clamping
2 2
units for conductors above 35 mm up to 300 mm (included)
IEC 61210, Connecting devices - Flat quick-connect terminations for electrical copper
conductors - Safety requirements
IEC 63522-0:─ , Electrical relays - Tests and measurements - Part 0: General and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63522-0 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
4 Test procedure
4.1 Purpose
To determine that the temperature rise of given relay parts does not exceed the specified limits.
___________
Under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
4.2 Procedure
4.2.1 Set-up
The relay shall be mounted and energized as follows, unless otherwise specified.
a) Test procedure A – Group mounting: The test is carried out with three relays mounted side
by side in the same direction according to Annex A.
Test procedure B – Single mounting: The test is carried out with one relay.
Unless specifically designed otherwise, the DUTs are tested in horizontal position with the
terminals pointing downward. The mounting distance shall be stated by the manufacturer.
b) Terminal screws and nuts or terminal screws are tightened with a torque equal to two-thirds
of that specified in IEC 60998-1 or IEC 60999-1.
NOTE 1 Relays for low-voltage circuits for household and similar purposes use IEC 60998-1 and relays for
other purposes use IEC 60999-1.
c) In case of screwless terminals, care is to be taken to ensure that the conductors are correctly
fitted to the terminals in accordance with IEC 60998-1 or IEC 60999-1 or IEC 60999-2 or as
specified by the manufacturer.
NOTE 2 Relays for low-voltage circuits for household and similar purposes use IEC 60998-1 and relays for
other purposes use IEC 60999-1.
d) The relays shall be mounted in a sufficiently large heat chamber without forced convection.
When an air circulating test chamber is used for testing, baffles shall be provided within the
test chamber, unless all other conditions in this clause are met.
NOTE 3 No force is applied to the terminal due to cable bending when installed in the chamber.
e) The DUT shall be protected against air draught and is not allowed to be subjected to any
artificial cooling.
f) During the test, the predetermined ambient temperature of the heat chamber shall not be
influenced by the DUT.
NOTE 4 For high capacity relays the influence could potentially not be excluded.
g) The ambient temperatur
...
IEC 63522-10 ®
Edition 1.0 2025-10
NORME
INTERNATIONALE
Relais électriques - Essais et mesurages -
Partie 10: Échauffement
ICS 29.120.70 ISBN 978-2-8327-0684-8
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SOMMAIRE
AVANT-PROPOS . 2
1 Domaine d'application . 4
2 Références normatives . 4
3 Termes et définitions. 4
4 Procédure d'essai . 4
4.1 Objet . 4
4.2 Procédure . 5
4.2.1 Montage. 5
4.2.2 Procédure . 5
4.2.3 Bornes . 6
4.3 Conditions à spécifier . 8
5 Évaluation . 8
5.1 Généralités . 8
5.1.1 Bobine de relais . 8
5.1.2 Bornes . 8
5.2 Rapport d'essai . 9
Annexe A (normative) Dispositif d'essai à la chaleur . 10
Bibliographie . 11
Figure A.1 – Disposition d'essai . 10
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
Relais électriques - Essais et mesurages -
Partie 10: Échauffement
AVANT-PROPOS
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L’IEC 63522-10 a été établie par le comité d'études 94 de l'IEC: Relais électriques. Il s'agit
d'une Norme internationale.
Le texte de cette Norme internationale est issu des documents suivants:
Projet Rapport de vote
94/1138/FDIS 94/1167/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à son approbation.
La langue employée pour l'élaboration de cette Norme internationale est l'anglais.
Ce document a été rédigé selon les Directives ISO/IEC, Partie 2, il a été développé selon les
Directives ISO/IEC, Partie 1 et les Directives ISO/IEC, Supplément IEC, disponibles sous
www.iec.ch/members_experts/refdocs. Les principaux types de documents développés par
l'IEC sont décrits plus en détail sous www.iec.ch/publications.
Une liste de toutes les parties de la série IEC 63522, publiées sous le titre général Relais
électriques – Essais et mesurages, se trouve sur le site web de l’IEC.
La présente Norme internationale doit être utilisée conjointement avec l’IEC 63522-0:– .
Le comité a décidé que le contenu de ce document ne sera pas modifié avant la date de stabilité
indiquée sur le site web de l’IEC sous webstore.iec.ch dans les données relatives au document
recherché. À cette date, le document sera
– reconduit,
– supprimé, ou
– révisé.
___________
En cours d’élaboration. Stade au moment de la publication: IEC CDV 63522-0:2024.
1 Domaine d'application
La présente partie de l’IEC 63522 traite des essais ainsi que des sévérités et conditions
appropriées pour les mesurages et essais destinés à évaluer l'aptitude des DUT (devices under
test - dispositifs soumis à l’essai) à fonctionner dans les conditions prévues de transport, de
stockage et dans tous les aspects de leur utilisation opérationnelle.
Le présent document définit une méthode d'essai normalisée pour l'échauffement.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie
de leur contenu, des exigences du présent document. Pour les références datées, seule
l’édition citée s’applique. Pour les références non datées, la dernière édition du document de
référence s’applique (y compris les éventuels amendements).
IEC 60998-1, Dispositifs de connexion pour circuits basse tension pour usage domestique et
analogue - Partie 1: Règles générales
IEC 60999-1, Dispositifs de connexion - Conducteurs électriques en cuivre - Prescriptions de
sécurité pour organes de serrage à vis et sans vis - Partie 1: Prescriptions générales et
2 2
particulières pour les organes de serrage pour les conducteurs de 0,2 mm à 35 mm (inclus)
IEC 60999-2, Dispositifs de connexion - Conducteurs électriques en cuivre - Prescriptions de
sécurité pour organes de serrage à vis et sans vis - Partie 2: Prescriptions particulières pour
2 2
et jusqu'à 300 mm (inclus)
les organes de serrage pour conducteurs au-dessus de 35 mm
IEC 61210, Dispositifs de connexion - Bornes plates à connexion rapide pour conducteurs
électriques en cuivre - Exigences de sécurité
IEC 63522-0:─ , Relais électriques - Essais et mesurages - Partie 0: Généralités et
recommandations
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions de l’IEC 63522-0 s'appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées
en normalisation, consultables aux adresses suivantes:
– IEC Electropedia: disponible à l’adresse https://www.electropedia.org/
– ISO Online browsing platform: disponible à l’adresse https://www.iso.org/obp
4 Procédure d'essai
4.1 Objet
Déterminer que l'échauffement de parties données du relais ne dépasse pas les limites
spécifiées.
___________
En cours d’élaboration. Stade au moment de la publication: IEC CDV 63522-0:2024.
4.2 Procédure
4.2.1 Montage
Le relais doit être monté et alimenté comme suit, sauf spécification contraire.
a) Procédure d’essai A – Montage en groupe: L’essai est réalisé avec trois relais montés côte
à côte dans la même direction conformément à l'Annexe A.
Procédure d’essai B – Montage simple: L'essai est réalisé avec un seul relais.
Sauf conception spécifiquement contraire, les DUT sont soumis aux essais dans la position
horizontale, les bornes orientées vers le bas. La distance de montage doit être énoncée par
le fabricant.
b) Le couple de serrage des vis et des écrous des bornes et le couple de serrage des vis est
égal aux deux tiers de celui spécifié dans l’IEC 60998-1 ou l'IEC 60999-1.
NOTE 1 Les relais pour les circuits basse tension pour usage domestique et analogue utilisent l’IEC 60998-1
et les relais pour d’autres objectifs utilisent l’IEC 60999-1.
c) Dans le cas des bornes sans vis, des précautions doivent être prises pour s'assurer que les
conducteurs sont correctement adaptés aux bornes conformément à l’IEC 60998-1 ou à
l'IEC 60999-1 ou à l'IEC 60999-2 ou selon les spécifications du fabricant.
NOTE 2 Les relais pour les circuits basse tension pour usage domestique et analogue utilisent l’IEC 60998-1
et les relais pour d’autres objectifs utilisent l’IEC 60999-1.
d) Les relais doivent être montés dans une étuve de dimensions suffisamment grandes sans
convexion forcée. Lorsqu'une enceinte d'essai à circulation d'air est utilisée pour les essais,
des chicanes doivent être prévues dans l'enceinte d'essai, à moins que toutes les autres
conditions du présent article ne soient satisfaites.
NOTE 3 Aucune force n'est appliquée à la borne en raison de la courbure du câble lorsqu'il est installé dans
l'enceinte.
e) Le DUT doit être protégé contre les courants d'air et ne saurait être soumis à un
refroidissement artificiel.
f) Au cours de l'essai, la température ambiante prédéterminée de l’étuve ne doit pas être
influencée par le DUT.
NOTE 4 L'influence ne peut potentiellement pas être exclue, en ce qui concerne les relais à grande capacité.
g) La température ambiante doit être de manière constante égale à la température de la pièce
ou être égale à la limite supérieure de la plage de températures de fonctionnement.
NOTE 5 L'autoéchauffement d'un relais à grande capacité peut entraîner une température de l'étuve proche de
la limite supérieure de la plage de tempé
...
IEC 63522-10 ®
Edition 1.0 2025-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays - Tests and measurements -
Part 10: Heating
Relais électriques - Essais et mesurages -
Partie 10: Échauffement
ICS 29.120.70 ISBN 978-2-8327-0684-8
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or
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CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Test procedure . 4
4.1 Purpose . 4
4.2 Procedure . 5
4.2.1 Set-up . 5
4.2.2 Procedure . 5
4.2.3 Terminals . 6
4.3 Conditions to be specified. 8
5 Evaluation . 8
5.1 General . 8
5.1.1 Relay coil . 8
5.1.2 Terminal . 8
5.2 Test report . 9
Annex A (normative) Heating test arrangement . 10
Bibliography . 11
Figure A.1 – Test arrangement . 10
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrical relays - Tests and measurements -
Part 10: Heating
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). 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. 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 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 63522-10 have been prepared by IEC technical committee 94: Electrical relays. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
94/1138/FDIS 94/1167/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of IEC 63522 series, published under the general title Electrical relays – Tests
and measurements, can be found on the IEC website.
This International Standard is to be used in conjunction with IEC 63522-0:─ .
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
___________
Under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
1 Scope
This part of IEC 63522 is used for testing along with the appropriate severities and conditions
for measurements and tests designed to assess the ability of DUTs to perform under expected
conditions of transportation, storage and all aspects of operational use.
This document defines a standard test method for heating.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 60998-1, Connecting devices for low-voltage circuits for household and similar purposes -
Part 1: General requirements
IEC 60999-1, Connecting devices - Electrical copper conductors – Safety requirements for
screw-type and screwless-type clamping units - Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 60999-2, Connecting devices - Electrical copper conductors - Safety requirements for
screw-type and screwless-type clamping units - Part 2: Particular requirements for clamping
2 2
units for conductors above 35 mm up to 300 mm (included)
IEC 61210, Connecting devices - Flat quick-connect terminations for electrical copper
conductors - Safety requirements
IEC 63522-0:─ , Electrical relays - Tests and measurements - Part 0: General and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63522-0 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
4 Test procedure
4.1 Purpose
To determine that the temperature rise of given relay parts does not exceed the specified limits.
___________
Under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.
4.2 Procedure
4.2.1 Set-up
The relay shall be mounted and energized as follows, unless otherwise specified.
a) Test procedure A – Group mounting: The test is carried out with three relays mounted side
by side in the same direction according to Annex A.
Test procedure B – Single mounting: The test is carried out with one relay.
Unless specifically designed otherwise, the DUTs are tested in horizontal position with the
terminals pointing downward. The mounting distance shall be stated by the manufacturer.
b) Terminal screws and nuts or terminal screws are tightened with a torque equal to two-thirds
of that specified in IEC 60998-1 or IEC 60999-1.
NOTE 1 Relays for low-voltage circuits for household and similar purposes use IEC 60998-1 and relays for
other purposes use IEC 60999-1.
c) In case of screwless terminals, care is to be taken to ensure that the conductors are correctly
fitted to the terminals in accordance with IEC 60998-1 or IEC 60999-1 or IEC 60999-2 or as
specified by the manufacturer.
NOTE 2 Relays for low-voltage circuits for household and similar purposes use IEC 60998-1 and relays for
other purposes use IEC 60999-1.
d) The relays shall be mounted in a sufficiently large heat chamber without forced convection.
When an air circulating test chamber is used for testing, baffles shall be provided within the
test chamber, unless all other conditions in this clause are met.
NOTE 3 No force is applied to the terminal due to cable bending when installed in the chamber.
e) The DUT shall be protected against air draught and is not allowed to be subjected to any
artificial cooling.
f) During the test, the predetermined ambient temperature of the heat chamber shall not be
influenced by the DUT.
NOTE 4 For high capacity relays the influence could potentially not be excluded.
g) The ambient temperature shall be constantly at room temperature or alternatively equal to
the upper limit of the operating temperature range.
NOTE 5 The self-heating of a high-capacity relay can lead the temperature of the heating chamber close to the
upper limit of the operating temperature range. The chamber only provides the difference to the limit.
h) When thermocouples are used for measuring the temperatures of a coil, at least two
thermocouples shall be used. The thermocouples shall be placed on the surface of the
magnet wire which is the upper surface based on the orientation during testing. The higher
reading shall be used.
4.2.2 Procedure
4.2.2.1 Step 1
The DUTs are put in a heat chamber and their coil temperature shall be monitored. The DUTs
shall not be energized and loaded with any current.
Set the chamber to defined ambient temperature.
After thermal equilibrium is achieved, the initial values of t and R are measured (see the
1 1
formula in 4.2.2.2).
NOTE These initial values are typically measured at reference conditions (room temperature).
4.2.2.2 Step 2
– For relays with make contacts, the coil(s) shall be energized with 1,1 times the rated coil
voltage or nominal coil voltage as stated by the manufacturer, or with 1,1 times the upper
limit of the rated coil voltage range, or with U (= limiting coil voltage) the contacts are
2 ;
loaded with the limiting continuous current as specified or any current specified by the
manufacturer for the contact set, until thermal equilibrium is reached. Then the values of t
and R are measured.
– For relays with break contacts, the heating test shall be done in two steps. First the coil is
energized as stated before for make contact relays (no contact load) and the temperature
rise of the coil itself. Secondly the coil is unenergized and the NC contact(s) loaded, until
thermal equilibrium is reached. Then the values of t and R are measured.
2 2
– For relays operated with pulse width modulation (PWM) and/or other methods of coil power
reduction or for bistable relays, the coil energization shall be as stated by the manufacturer.
The temperature rise of the relay parts shall be determined:
– for relays for continuous duty: after thermal equilibrium has been reached;
– for relays for short-time or intermittent duty: at the highest temperature attained during such
operation.
The temperature(s) of the coil(s) shall be determined by the resistance method and the
temperature rise calculated according to the following formula:
RR−
t (234,5+t )− (t−t )
R
where
∆t is the temperature rise;
R is the resistance at the beginning of the test;
R is the resistance at the end of the test;
t is the ambient temperature in °C at the beginning of the test;
t is the ambient temperature in °C at the end of the test.
The value of 234,5 applies to electrolytic copper (EC58) according to IEC 60228. For other
materials, the respective values shall be used instead and indicated by the manufacturer.
The temperature rise of other relay parts as specified shall be measured with fine wire
thermocouples or equivalent sensors that do not significantly influence the temperature being
determined of those parts.
4.2.3 Terminals
4.2.3.1 General
Temperature at the terminals is determined by means of fine wire thermocouples which are
positioned so that they have negligible effect on the temperature being determined. The
measuring points are positioned on the terminals as close as possible to the body of the relay.
If the thermocouples cannot be positioned directly on the terminals, the thermocouples may be
fixed on the conductors as close as possible to the relay, see Annex A.
Temperature sensors other than thermocouples are permitted, provided they show equivalent
test results.
∆=
For the various terminal types, the following test arrangements in 4.2.3.2, 4.2.3.3, 4.2.3.4,
4.2.3.5 or 4.2.3.6 apply:
4.2.3.2 Solder terminals
The electrical interconnections between the relays are made with rigid conductors with cross-
sectional area according to IEC 63522-0:─, Table 3.
The connections of the relay to the voltage or current source(s) are realized with flexible
conductors and cross-sectional area according to IEC 63522-0:─, Table 3.
Min 200 mm of the minimum conductor length for testing shall be placed in the temperature
chamber.
4.2.3.3 Flat quick-connect terminations
The electrical interconnections between the relays as well as to the voltage or current source(s)
shall be made using female connectors (made of nickel-plated steel) according to IEC 61210
and with flexible conductors with length and cross-sectional area according to IEC 63522-0:─,
Table 3 that are soldered in the crimping area.
NOTE This prescription is intended to enable the determination of the flat quick-connect termination of the relay
without considerable influence neither from the female connector nor the quality of the crimping.
4.2.3.4 Screw-type and screwless-type terminations
The electrical interconnections between the relays are made with bare rigid conductors
(= default, however the usage of flexible conductors is allowed if defined from the manufacturer;
this shall be stated in the documentation and in the test report) in accordance with
IEC 63522-0:–, Table 3 with a maximum of 400 A, and in accordance with IEC 63522-0:─,
Table 4 with a maximum of 800 A. The connections of the relay to the voltage or current
source(s) are realized with flexible conductors in accordance with Table 3 with a maximum of
400 A, and in accordance with IEC 63522-0:─, Table 4 with a maximum of 800 A. The electrical
interconnections between the relays are made with copper bars in accordance with
IEC 63522-0:─, Table 5 with a maximum of 1 000 A. Any fixture to hold the flexible-connected
test samples in place is not allowed to have any impact on the results.
4.2.3.5 Alternative termination types
The electrical interconnections between the relays are made with bare rigid conductors
(= default, however the usage of flexible conductors is allowed if defined from the manufacturer;
this shall be stated in the documentation and in the test report) in accordance with
IEC 63522-0:─, Table 3 with a maximum of 400 A, and in accordance with IEC 63522-0:─,
Table 4 with a maximum of 800 A. The connections of the relay to the voltage or current
source(s) are realized with flexible conductors in accordance with Table 3 with a maximum of
400 A, and in accordance with IEC 63522-0:─, Table 4 with a maximum of 800 A. The electrical
interconnections between the relays are made with copper bars in accordance with
IEC 63522-0:─, Table 5 with a maximum of 1 000 A. Any fixture to hold the flexible-connected
test samples in place is not allowed to have any impact on the results.
4.2.3.6 Sockets
The maximum steady-state temperature limits permissible for the connections between relay
and socket as well as for the insulating materials of both relay and socket adjacent to the
connection shall not be exceeded.
The electrical interconnections between the sockets are made with conductors in accordance
with IEC 63522-0:─, Table 3 with a maximum of 400 A, and in accordance with IEC 63522-0:─,
Table 4 with a maximum of 800 A. The connections of the sockets to the voltage or current
source(s) are realized with flexible conductors in accordance with IEC 63522-0:─, Table 3 with
a maximum of 400 A, and in accordance with IEC 63522-0:─, Table 4 with a maximum of 800 A.
The electrical interconnections between the sockets are made with copper bars in accordance
with IEC 63522-0:─, Table 5 with a maximum of 1 000 A.
For the test setup test procedure A – Group mounting shall be used, the mounting distance
between sockets shall be zero and the relay terminals shall pointing still downward, if not
otherwise specified by the product specification or the manufacturer.
The same mounting direction is used for the heating test of the relay as well the relay and
socket combination.
4.3 Conditions to be specified
The conditions to be specified are the following:
a) mounting of the relay;
b) value and, if applicable, duration of energization;
c) temperature coefficient of the wire material, if other than electrolytic copper;
d) ambient temperature;
e) contact load, if required;
f) limits of temperature rise for all relay parts specified.
5 Evaluation
5.1 General
The evaluation shall be done for the relay coil and the terminations as followed.
5.1.1 Relay coil
The relay coil shall not exceed the maximum allowed temperature for the used coil wire
insulation class in according to the product specification.
5.1.2 Terminal
5.1.2.1 Solder terminals
Any measured pin temperature shall not exceed the maximum temperature specified for the
used plastic material according to the product specification.
5.1.2.2 Flat quick-connect terminations
Any measured temperature shall not exceed the maximum temperature specified for the used
plastic material according to the product specification.
5.1.2.3 Screw-type and screwless-type terminations
The temperature rise at the terminals shall not exceed 45 K. This can be verified without the
temperature rise influence of the relay contacts and the coil (e.g. bridged or short-circuited or
soldered relay contacts).
5.1.2.4 Alternative termination types
The temperature rise at the terminals shall not exceed 45 K. This can be verified without the
temperature rise influence of the relay contacts and the coil (e.g. bridged or short-circuited or
soldered relay contacts).
5.1.2.5 Sockets
The maximum steady-state temperature limits permissible for the connections between relay
and socket as well as for the insulating materials of both relay and socket adjacent to the
connection shall not be exceeded.
This can be verified without the temperature rise influence of the relay contacts and the coil
(e.g. bridged or short-circuited or soldered relay contacts).
Any other temperature on any connection (e.g. relays pin/socket), as well plastic parts
supporting life parts in position, shall not exceed the max temperature specified in the product
specification.
5.2 Test report
If this document is executed as a part of a test record of another standard, then the results shall
be reported as required in the other standard.
Otherwise, it is recommended to issue a dedicated test report according to this document.
The test report shall contain all the information necessary to reproduce the test. In particular,
the following shall be recorded:
– DUT description;
– test set up – especially when other than described in Annex A;
– cross sections and conductor length for
• contact, as well
• coil circuit;
– temperature at test beginning, ° C;
– temperature at test end (thermal equilibrium reached), ° C;
– coil resistance at test beginning;
– coil resistance at test end;
– number of DUT’s;
– energization conditions: if other than the rated coil voltage;
– contact load;
– used conductor material, if other than copper;
– the final results;
– if applicable – any other observation.
Annex A
(normative)
Heating test arrangement
The test shall be made as indicated in Figure A.1 with the terminals pointing downward, however,
and on an insulating plate.
In particular cases, the manufacturer can submit the relays mounted on pc board as in actual
use. All relevant details of the test arrangement (for example material and thickness of the pc
board, width and thickness of the conductors on the board, plating or coating (if applicable),
length and cross-sectional area of external conductors) shall be indicated in the test report.
Soldering should be carried out with adequate tools and care.
Dimensions in millimetres
Key
1, 2 contact terminals
T ,T , T thermocouples
1 2 3
a, b coil terminals
S mounting distance
The test point for measuring the ambient temperature shall be in that horizontal plane defined by the axis of the
centre relay. The distance from the coil side of the relay shall be (50 ± 5) mm.
Figure A.1 – Test arrangement
Bibliography
IEC 60038, IEC standard voltages
IEC 60050-441:1984, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses
IEC 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements
IEC 60068-2-20, Environmental testing – Part 2-20: Tests – Test Ta and Tb: Test methods for
solderability and resistance to soldering heat of devices with leads
IEC 60085, Electrical insulation – Thermal evaluation and designation
IEC 60228, Conductors of insulated cables
IEC 60364-4-44, Low-voltage electrical installations – Part 4-44: Protection for safety –
Protection against voltage disturbances and electromagnetic disturbances
IEC 60417, Graphical symbols for use on equipment, available at https://graphical-
symbols.info/equi
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