IEC 63522-45:2025

IEC 63522-45 ®
Edition 1.0 2025-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays - Tests and measurements -
Part 45: Maximum frequency of operation

Relais électriques - Essais et mesurages -
Partie 45: Fréquence maximale de fonctionnement
ICS 29.120.70  ISBN 978-2-8327-0483-7

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CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
3.1 Terms and definitions related to conditions and operations . 4
3.2 Terms and definitions related to electrical measurements . 5
4 Test procedure . 5
4.1 Purpose . 5
4.2 Procedure . 5
4.2.1 General. 5
4.2.2 Test circuit . 6
4.2.3 Frequency of operation . 6
4.2.4 Monitoring . 6
4.3 Conditions to be specified. 7
5 Evaluation . 7
5.1 General . 7
5.2 Test report . 7
Annex A (normative) Test procedures for particular reed switch (reed contact) types
and similar products . 8
Annex B (normative) Test circuits for maximum frequency of operation . 9
B.1 Test circuits for the measurement of time parameters, coil current and
minimum time of energization of a make contact . 9
B.1.1 Voltage drop method . 9
B.1.2 Current probe method . 10
B.2 Test circuits for the measurement of time parameters, coil current and
minimum time of energization of a change-over contact . 11
B.2.1 Voltage drop method . 11
B.2.2 Current probe method . 12
Bibliography . 13

Figure B.1 – Test circuit with voltage drop method for the measurement of time
parameters, coil current and minimum time of energization of a make contact. 9
Figure B.2 – Test circuit with current probe method for the measurement of time
parameters, coil current and minimum time of energization of a make contact. 10
Figure B.3 – Test circuit with voltage drop method for the measurement of time
parameters, coil current and minimum time of energization of a change-over contact . 11
Figure B.4 – Test circuit with current probe method for the measurement of time
parameters, coil current and minimum time of energization of a change-over contact . 12

Table 1 – Test circuit . 6
Table 2 – Recommended frequencies of operation . 6
Table A.1 – Test procedures of maximum frequency of operation for reed switch (reed
contact) types and similar products . 8

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrical relays - Tests and measurements -
Part 45: Maximum frequency of operation

FOREWORD
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IEC 63522-45 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
94/1022/FDIS 94/1136/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, 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
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