IEC 63522-8:2024

IEC 63522-8 ®
Edition 1.0 2024-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Tests and measurements –
Part 8: Timing
Relais électriques – Essais et mesurages –
Partie 8: Contrôle des temps
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews, graphical symbols and the glossary.
committee, …). It also gives information on projects, replaced With a subscription you will always have access to up to date
and withdrawn publications. content tailored to your needs.

IEC Just Published - webstore.iec.ch/justpublished
Electropedia - www.electropedia.org
Stay up to date on all new IEC publications. Just Published
The world's leading online dictionary on electrotechnology,
details all new publications released. Available online and once
containing more than 22 500 terminological entries in English
a month by email.
and French, with equivalent terms in 25 additional languages.

Also known as the International Electrotechnical Vocabulary
IEC Customer Service Centre - webstore.iec.ch/csc
(IEV) online.
If you wish to give us your feedback on this publication or need

further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC -  IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications, symboles
en utilisant différents critères (numéro de référence, texte, graphiques et le glossaire. Avec un abonnement, vous aurez
comité d’études, …). Elle donne aussi des informations sur les toujours accès à un contenu à jour adapté à vos besoins.
projets et les publications remplacées ou retirées.

Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au monde,
Restez informé sur les nouvelles publications IEC. Just
avec plus de 22 500 articles terminologiques en anglais et en
Published détaille les nouvelles publications parues.
français, ainsi que les termes équivalents dans 25 langues
Disponible en ligne et une fois par mois par email.
additionnelles. Egalement appelé Vocabulaire

Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc

Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC 63522-8 ®
Edition 1.0 2024-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Tests and measurements –

Part 8: Timing
Relais électriques – Essais et mesurages –

Partie 8: Contrôle des temps
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.70  ISBN 978-2-8322-9904-3

– 2 – IEC 63522-8:2024 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
3.1 General . 5
3.2 Terms and definitions related to electromechanical elementary relays . 5
3.3 Terms and definitions related to time relays . 7
4 Test procedure . 8
4.1 Timing tests for elementary relays . 8
4.1.1 Purpose . 8
4.1.2 Procedure . 8
4.1.3 Conditions . 9
4.2 Timing test for time relays . 10
4.2.1 Purpose . 10
4.2.2 Procedure . 11
4.2.3 Conditions . 11
5 Evaluation . 11
5.1 Timing tests for elementary relays . 11
5.1.1 General . 11
5.1.2 Operate / set time . 12
5.1.3 Release / reset time . 12
5.1.4 Bounce time . 12
5.1.5 Stabilization time . 12
5.1.6 Minimum time of energization . 12
5.1.7 Contact time difference . 12
5.2 Timing tests for time relays . 12
5.2.1 Calculation of setting accuracy and repeatability . 12
5.2.2 Calculation of the influence of input voltage and ambient temperature . 13
5.3 Test report . 13
5.3.1 General . 13
5.3.2 Elementary relay timing test report . 13
5.3.3 Time relay timing test report . 14
Annex A (informative) Calculation example for setting accuracy, repeatability and
effect of influence in time relays . 15
A.1 General . 15
A.2 Example of calculation . 15
Bibliography . 16

Figure 1 – Typical circuit for the measurement of time parameters . 9
Figure 2 – Typical traces on an oscilloscope screen during time measurements . 10

Table 1 – Changing of influencing quantities . 11
Table A.1 – Calculation formulae . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL RELAYS –
TESTS AND MEASUREMENTS –
Part 8: Timing
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 63522-8 has 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
94/1036/FDIS 94/1078/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.

– 4 – IEC 63522-8:2024 © IEC 2024
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 the IEC 63522 series, published under the general title Electrical relays –
Tests and measurements, can be found on the IEC website.
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.
ELECTRICAL RELAYS –
TESTS AND MEASUREMENTS –
Part 8: Timing
1 Scope
This part of IEC 63522, when required by the detail specification, is used for testing all kinds of
relays. This test can also be used for similar devices when specified in a detail specification.
This document defines a standard test method to ensure that the relay times are within the
specified limits.
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 63522-0, Electrical relays – Tests and measurements – Part 0: Testing – General and
guidance
3 Terms and definitions
3.1 General
For the purposes of this document, the terms and definitions given in IEC 63522-0 and the
following 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
3.2 Terms and definitions related to electromechanical elementary relays
3.2.1
operate time
set time
time interval between the application of the specified input voltage to a relay in the release/reset
condition and the change of state of the last output circuit, bounce time not included
[SOURCE: IEC 60050-444:2002, 444-05-01, modified – The term "set time" has been added,
the domain "(for elementary relays)" and figure have been omitted, and the term "reset" has
been added to the definition.]
___________
First edition under preparation. Stage at the time of publication: IEC CDV 63522-0:2024.

– 6 – IEC 63522-8:2024 © IEC 2024
3.2.2
release time
time interval between the removal of the specified input voltage from a monostable relay in the
operate condition and the change of state of the last output circuit, bounce time not included
[SOURCE: IEC 60050-444:2002, 444-05-02, modified – The domain "(for elementary relays)"
and figure have been omitted.]
3.2.3
reset time
time interval between the application of the specified input voltage to a bistable relay in the
operate condition and the change of state of the last output circuit, bounce time not included
[SOURCE: IEC 60050-444:2002, 444-05-03, modified – The domain "(for elementary relays)"
and figure have been omitted.]
3.2.4
bounce time
for a contact which is closing/opening its circuit, time interval between the instant when the
contact circuit first closes/opens and the instant when the circuit is finally closed/opened
[SOURCE: IEC 60050-444:2002, 444-05-04, modified – Figure 1 has been omitted.]
3.2.5
bridging time
for a change-over make-before-break contact, time interval during which both contact circuits
are closed
[SOURCE: IEC 60050-444:2002, 444-05-05]
3.2.6
transfer time
for a change-over break-before-make contact, time interval during which both contact circuits
are open
[SOURCE: IEC 60050-444:2002, 444-05-06]
3.2.7
stabilization time
time interval between the instant when a specified input voltage is applied to an
electromechanical relay and the instant when the last output circuit is closed/opened and fulfils
the specified requirements, bounce time included
[SOURCE: IEC 60050-444:2002, 444-05-07, modified – The domain "(for elementary relays)"
has been omitted.]
3.2.8
minimum time of energization
minimum duration of the input voltage to ensure that the relay operates or resets
[SOURCE: IEC 60050-444:2002, 444-05-08]
3.2.9
contact time difference
for a relay having several contacts of the same type, difference between the maximum value of
the operate (release/reset) time and the minimum value of the operate (release/reset) time

3.3 Terms and definitions related to time relays
3.3.1
specified time
specified characteristic of the time relay at given type of function, for example operate time,
release time, pulse on time, interval time
[SOURCE: IEC 61812-1:2023, 3.1.3]
3.3.2
effect of influence
effect of influence on specified time
degree with which the influence quantity within its nominal range has an effect on the specified
time
[SOURCE: IEC 60050-445:2010, 445-06-02, modified – The term "effect on influence" has been
added.]
3.3.3
setting accuracy
difference between the measured value of the specified time and the reference value set on the
scale
Note 1 to entry: For analogue setting the setting accuracy value relates to the maximum setting value.
[SOURCE: IEC 60050-445:2010, 445-06-07]
3.3.4
repeatability
difference between the upper and lower limits of the specified confidence range determined
from several time measurements of a time relay under identical conditions
Note 1 to entry: Preferably the repeatability is indicated as a percentage of the mean value of all measured values.
[SOURCE: IEC 60050-445:2010, 445-06-08]
3.3.5
recovery time
minimum time interval for which the power supply is removed or control signal is applied or
removed before the specified function can be performed again
[SOURCE: IEC 60050-445:2010, 445-06-04, modified – In the definition, the verbal form "must
be" is replaced with "is".]
3.3.6
minimum control impulse time
shortest duration of the power supply or control signal to fulfil the specified function
[SOURCE: IEC 60050-445:2010, 445-06-02]

– 8 – IEC 63522-8:2024 © IEC 2024
4 Test procedure
4.1 Timing tests for elementary relays
4.1.1 Purpose
These tests are applicable to all elementary relays, in order to ensure that the relay times are
within the specified limits. These tests can be used:
1) for statistical evaluation of the behavior of a type of relay;
2) for confirmation of the specification of a single relay or when the application requires time
within fixed limits.
4.1.2 Procedure
4.1.2.1 General
For the energization of the coil, the output impedance of the source shall be chosen to ensure
that the maximum voltage drop and the setting time do not exceed the values specified in the
product specification.
The switch for switching the coil shall be bounce-free.
For AC coil relays, a synchronous switching device, variable in point on wave, shall be used.
The trigger delay angle of the sinewave shall be set either to obtain the maximum time interval,
or to the specified points on wave, as specified in the product specification. As an alternative,
when only a reference value is needed, a DC energization of the coil with a value that causes
equivalent power or ampere turns of the coil may be used.
The contact load shall be resistive, the switching voltage shall be as specified in the product
specification, the switching current shall be 1 mA for CC0, 10 mA for CC1, 100 mA for CC2,
unless otherwise specified in the product specification.
For the measurement of operate time, transfer time, bridging time, release time and bounce
time, a suitable circuit is given in Figure 1, and typical traces on the oscilloscope screen are
shown in Figure 2. Other equivalent measuring methods are also allowed.
Before starting the test, the samples to be measured shall be preconditioned in the
measurement room for a period of at least 2 h.
4.1.2.2 Statistical evaluation of a relay type
A minimum of 5 relays of equivalent construction will be measured in order to get a general
estimation; more precise values should be derived from a statistical analysis on a larger number
of samples.
All the (minimum) 5 relays will be measured, and on each relay at least 5 consecutive
measurements will be performed and recorded, leaving time enough for coil cooling after any
energization.
For defining the nominal value of each time, all the values (minimum 5 × 5 = 25) will be
considered; the average and the standard deviation of all the values will be calculated.
4.1.2.3 Single relay or single event measurement
In such cases, a single relay will of course be measured.

4.1.3 Conditions
The conditions to be specified are the following:
a) mounting position of the relay;
b) coil voltage value, cycling rate and duty factor of the energization. Preferably, the lower limit
of the operative range should be used for testing the operate time, and the upper limit for
testing the release time; in the case of bistable relays, set and reset values shall be
specified;
c) means for the disconnection for release time measurement, if of importance. Short-circuiting
the relay coil while protecting the power supply source from overload may be specified as
an alternative;
d) maximum voltage drop and setting time of the source;
e) contact category, switching voltage and switching current;
f) times to be measured, their limits and contact sequencing;
g) for AC coil relays, the trigger delay angle of the sinewave (e.g. 0°, 45°, 90°, etc.);
h) contact(s) to be checked;
i) discontinuities to be ignored if limit is other than 10 µs;
j) suppression components on coil or contact, if required;
k) number of relays tested.
Components
C coil of the DUT
c contact of the DUT
U energization supply
S switch, bounce-free
B battery
R to R resistors
1 4
OSC oscilloscope
Sync trigger input
Y vertical deflection input
NOTE In order to distinguish between bridging and transfer time, the following ratios can be used for the resistors:
R = 1, R = 2, R = 2/3, R = 1.
1 2 3 4
Figure 1 – Typical circuit for the measurement of time parameters

– 10 – IEC 63522-8:2024 © IEC 2024

Key
1 make contact o operate time
2 break contact r release time
3 break-before-make contact b bounce time
4 make-before-break contact t transfer time
s bridging time
Figure 2 – Typical traces on an oscilloscope screen during time measurements
4.2 Timing test for time relays
4.2.1 Purpose
These tests are applicable to all time relays.
The constructional design or the setting of the timing circuit determines the relay function.
The specified time may be permanently set or adjustable.

4.2.2 Procedure
The functional tests are to be carried out with the reference values of the input quantities. The
number of successive measurements shall be 10 minimum.
The test shall be considered satisfactory if the time relay accomplishes its function properly
within the tolerance values as indicated by the manufacturer.
4.2.3 Conditions
The setting accuracy will be given:
• as a percentage of the full-scale value, for time relays with analogue setting;
• as a percentage of the setting value or in absolute values, for time relays with digital setting.
The repeatability may be specified as the higher value of either a percentage value or an
absolute value, e.g., 0,01 % or 10 ms.
The recovery time and minimum control impulse time are to be stated by the manufacturer.
The effect of influence of the input voltage and temperature on the specified time(s) is checked,
with reference to Table 1; for this purpose, only one quantity will be changed whereas the other
quantity has the nominal value. The number of successive measurements shall be 10 minimum.
For the time relay with multiple setting range functions, the shorter time setting range may be
used.
For checking the influence of the temperature, the time relays are operated in an appropriate
chamber until thermal equilibrium is attained at the ambient temperature. Thermal equilibrium
is defined in IEC 63522-0.
Table 1 – Changing of influencing quantities
Changed quantity Value Tolerance unit
Input voltage 110 % and %/V
80 % or
85 % or
90 %
Ambient temperature −5 °C %/K
+40 °C
5 Evaluation
5.1 Timing tests for elementary relays
5.1.1 General
The times listed in 5.1.2 to 5.1.4 shall be measured on at least one specified contact; when
required, all the contacts of a multipole relay should be tested.
Discontinuities of less than 10 µs, unless otherwise specified in the product specification, shall
be ignored.
If required, the tests of 5.1.5 to 5.1.7 shall be performed.

– 12 – IEC 63522-8:2024 © IEC 2024
5.1.2 Operate / set time
Operate time and transfer (or bridging) time shall be measured when the relay is energized as
specified in the product specification.
5.1.3 Release / reset time
On monostable relays, release time and transfer (or bridging) time shall be measured after the
disconnection of the specified energization; on bistable relays, reset time and transfer (or
bridging) time shall be measured after the application of the specified energization.
5.1.4 Bounce time
Contact bounce time shall be measured in both the tests of 5.1.2 and 5.1.3.
5.1.5 Stabilization time
The test shall be carried out on at least one contact by applying the coil voltage values and
measuring contact parameters after the time to stable closed conditions, all details being as
specified in the product specification.
5.1.6 Minimum time of energization
The test shall be carried out on at least one contact. The relay shall be energized with its rated
coil voltage and, after elapse of the specified minimum time of operate energization, the
energization shall be reduced to
• zero, for bistable relays;
• the specified characteristic non-release voltage, for monostable relays.
After the reduction, the specified contact parameters shall be measured, all details being as
specified in the product specification.
NOTE The minimum time of energization can be useful in order to use PWM or maintenance mode.
5.1.7 Contact time difference
The test shall be carried out on two or more specified contacts, each of them being monitored
by a suitable method. If the test circuit indicated in Figure 1 is used, the oscilloscope shall have
the number of traces required to observe the differences in time.
5.2 Timing tests for time relays
5.2.1 Calculation of setting accuracy and repeatability
The maximum difference between the measured values and the setting value, as a percentage
of the setting value, shall be compared with the tolerances of the setting accuracy indicated by
the manufacturer.
The difference between the maximum and the minimum measured values, as a percentage of
the mean of the measured values, shall be compared with the tolerances of the repeatability
indicated by the manufacturer.
See calculation example in Annex A.

5.2.2 Calculation of the influence of input voltage and ambient temperature
The influence of the input voltage on the specified time is calculated in the following way:
• T is the average of 10 measurements made at rated voltage U ,
Un n
is the average of 10 measurements made at voltage U ,
• T
U1 1
• Δ is the difference, in V, between U and U .
U n 1
The influence of the input voltage is defined as:
[100 × (T – T ) / T ] / ΔU
Un U1 Un
and is expressed in % / V.
The influence of the ambient temperature on the specified time is calculated in the following
way:
• T is the average of 10 measurements made at rated temperature θ ,
θn n
• T is the average of 10 measurements made at temperature θ ,
θ1 1
• Δ is the difference, in K, between θ andθ .
θ n 1
The influence of the ambient temperature is defined as:
[100 × (T – T ) / T ] / Δ
θn θ1 θn θ
and is expressed in % / K.
5.3 Test report
5.3.1 General
If this document is applied 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 in 5.3.2 to 5.3.3 shall be recorded.
5.3.2 Elementary relay timing test report
i) number of relays under test, if different from 5;
ii) number of measurements on each relay, if different from 5;
iii) mounting position of the relay;
iv) coil voltage value(s); for AC coil relays, trigger delay angle;
v) switching voltage and switching current values;
vi) eventual suppression components on coil or contact;
vii) average and standard deviation calculated on the following values:
• operate / set time,
• release / reset time,
• bounce time.
– 14 – IEC 63522-8:2024 © IEC 2024
5.3.3 Time relay timing test report
i) number of time relays under test;
ii) number of measurements on each time relay, if different from 10;
iii) input voltage value(s);
iv) ambient temperature value(s);
v) setting value;
vi) mean of the measured values;
vii) setting accuracy;
viii) repeatability.
Annex A
(informative)
Calculation example for setting accuracy, repeatability
and effect of influence in time relays
A.1 General
The setting accuracy, repeatability and effect of influence are determined from the following
calculation formulae in Table A.1.
Table A.1 – Calculation formulae
Accuracy / Influence effects Formulae
TT−
MS
× 100
Setting [%]
TM
S
Accuracy
TT−
max min
± × × 100
Repeatability [%]
2 TM
S
TM − TM
x1
± × 100
Voltage [%]
TM
S
Influence effects
TM − TM
x2
± × 100
Temperature [%]
TM
S
where
T is the mean of the measured values;
M
T is the setting time;
S
TM is the full-scale value with analogue setting, or setting value in absolute values with digital setting;
S
T is the maximum measured value;
max
T is the minimum measured value;
min
TM is the maximum measured value within the rated input voltage range;
x1
TM is the maximum measured value within the ambient temperature range.
x2
A.2 Example of calculation
Measured values: (9,91, 9,95, 10,01, 9,97, 9,99, 10,05, 10,02, 9,98, 10,00, 9,93) s
TM 9,981 s
TM 10 s
S
T 10 s
S
T 10,05 s
max
T 9,91 s
min
9,981− 10
Setting accuracy [%] × 100 = 0,19 %
1 10,05− 9,91
Repeatability [%] ± × × 100 = 0,70 %
2 10
– 16 – IEC 63522-8:2024 © IEC 2024
Bibliography
IEC 60038, IEC standard voltages
IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses, available at https://www.electropedia.org
IEC 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements
IEC 60417, Graphical symbols for use on equipment, available at http://www.graphical-
symbols.info/equipment
IEC 60947-2, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers
IEC 60947-5-1, Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and
switching elements – Electromechanical control circuit devices
IEC 61810-7:2006, Electromechanical elementary relays – Part 7: Test and measurement
procedures
IEC 61812-1:2023, Time relays and coupling relays for industrial and residential use – Part 1:
Requirements and tests
___________
– 18 – IEC 63522-8:2024 © IEC 2024
SOMMAIRE
AVANT-PROPOS . 19
1 Domaine d'application . 21
2 Références normatives . 21
3 Termes et définitions . 21
3.1 Généralités . 21
3.2 Termes et définitions relatifs aux relais électromécaniques élémentaires . 21
3.3 Termes et définitions relatifs aux relais temporisés . 23
4 Procédure d'essai . 24
4.1 Contrôle des temps des relais élémentaires . 24
4.1.1 Objet . 24
4.1.2 Procédure . 24
4.1.3 Conditions . 25
4.2 Contrôle des temps des relais temporisés . 27
4.2.1 Objet . 27
4.2.2 Procédure . 28
4.2.3 Conditions . 28
5 Évaluation . 28
5.1 Contrôle des temps des relais élémentaires . 28
5.1.1 Généralités . 28
5.1.2 Temps de fonctionnement / de réglage . 29
5.1.3 Temps de relâchement / de retour . 29
5.1.4 Temps de rebondissement . 29
5.1.5 Temps de stabilisation . 29
5.1.6 Temps minimal d'alimentation . 29
5.1.7 Dispersion des temps de contact . 29
5.2 Contrôle des temps des relais temporisés . 29
5.2.1 Calcul de l'exactitude de réglage et de la répétabilité . 29
5.2.2 Calcul de l'influence de la tension d'entrée et de la température
ambiante . 30
5.3 Rapport d'essai . 30
5.3.1 Généralités . 30
5.3.2 Rapport d'essai du contrôle des temps des relais élémentaires . 30
5.3.3 Rapport d'essai du contrôle des temps des relais temporisés . 31
Annexe A (informative) Exemple de calcul pour l’exactitude de réglage, la répétabilité
et l'effet d'influence dans les relais temporisés . 32
A.1 Généralités . 32
A.2 Exemple de calcul . 33
Bibliographie . 34

Figure 1 – Circuit type pour le mesurage des caractéristiques de temps . 26
Figure 2 – Oscillogrammes types pendant des mesurages de temps . 27

Tableau 1 – Modification des grandeurs d'influence . 28
Tableau A.1 – Formules de calcul . 32

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
RELAIS ÉLECTRIQUES –
ESSAIS ET MESURAGES –
Partie 8: Contrôle des temps
AVANT-PROPOS
1) La Commission Électrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l’ensemble des comités électrotechniques nationaux (Comités nationaux de l’IEC). L’IEC a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l’électricité et de l'électronique. À cet effet, l'IEC – entre autres activités – publie des Normes internationales,
des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des
Guides ci-après dénommés “Publication(s) de l'IEC”). Leur élaboration est confiée à des comités d'études, aux
travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les organisations
internationales, gouvernementales et non gouvernementales, en liaison avec l’IEC, participent également aux
travaux. L’IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des
conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de l'IEC concernant les questions techniques représentent, dans la mesure du
possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l'IEC intéressés
sont représentés dans chaque comité d'études.
3) Les Publications de l’IEC se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de l’IEC. Tous les efforts raisonnables sont entrepris afin que l’IEC
s’assure de l’exactitude du contenu technique de ses publications; l’IEC ne peut pas être tenue responsable de
l’éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
4) Dans le but d’encourager l’uniformité internationale, les Comités nationaux de l’IEC s’engagent, dans toute la
mesure possible, à appliquer de façon transparente les Publications de l’IEC dans leurs publications nationales
et régionales. Toutes divergences entre toutes Publications de l’IEC et toutes publications nationales ou
régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.
5) L’IEC elle-même ne fournit aucune attestation de conformité. Des organismes de certification indépendants
fournissent des services d'évaluation de conformité et, dans certains secteurs, accèdent aux marques de
conformité de l’IEC. L’IEC n'est responsable d'aucun des services effectués par les organismes de certification
indépendants.
6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.
7) Aucune responsabilité ne doit être imputée à l’IEC, à ses administrateurs, employés, auxiliaires ou mandataires,
y compris ses experts particuliers et les membres de ses comités d’études et des Comités nationaux de l’IEC,
pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre dommage de quelque
nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais de justice) et les dépenses
découlant de la publication ou de l’utilisation de cette Publication de l’IEC ou de toute autre Publication de l’IEC,
ou au crédit qui lui est accordé.
8) L’attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications
référencées est obligatoire pour une application correcte de la présente publication.
9) L'IEC attire l'attention sur le fait que la mise en application du présent document peut entraîner l'utilisation d'un
ou de plusieurs brevets. L'IEC ne prend pas position quant à la preuve, à la validité et à l'applicabilité de tout
droit de brevet revendiqué à cet égard. À la date de publication du présent document, l'IEC n'a pas reçu
notification qu'un ou plusieurs brevets pouvaient être nécessaires à sa mise en applic
...