Electrical relays - Tests and measurements - Part 52: Coil overvoltage

IEC 63522-52:2026 is used for testing all kind of electrical relays and for evaluating their ability to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a standard test method for coil overvoltage in device under test (DUT) equipped with a coil. is used for testing all kind of electrical relays and for evaluating their ability to perform under expected conditions of transportation, storage and all aspects of operational use.

Elektrische Relais - Mess- und Prüfverfahren - Teil 52: Spulenüberspannung

Relais électriques - Essais et mesurages - Partie 52: Surtension aux bornes de la bobine

IEC 63522-52:2026 traite des essais de tous les types de relais électriques et elle évalue leur aptitude à fonctionner dans les conditions prévues de transport, de stockage et dans tous les aspects de leur utilisation opérationnelle. Le présent document a pour objet de définir une méthode d'essai normalisée relative à la surtension aux bornes de la bobine dans un dispositif en essai (DUT) équipé d'une bobine

Električni releji - Preskusi in meritve -52. del: Prenapetostna tuljava

General Information

Status
Published
Publication Date
16-Apr-2026
Drafting Committee
IEC/TC 94 - IEC_TC_94
Current Stage
6060 - Document made available - Publishing
Start Date
17-Apr-2026
Due Date
01-Sep-2023
Completion Date
17-Apr-2026

Relations

Effective Date
31-Mar-2026
Effective Date
31-Mar-2026
Effective Date
31-Mar-2026

Overview

FprEN IEC 63522-52:2025 (IEC 63522-52) defines a standardized test method for coil overvoltage on electrical relays. This committee draft (CDV) from IEC TC 94 is submitted for CENELEC parallel voting and is part of the IEC 63522 series - meant to be used together with IEC 63522-0 (General and guidance). It applies to all kinds of relays (electromechanical relays, reed relays/switches, solid-state relays, time relays and hybrid technologies) and describes how to simulate and evaluate the effects of a failed voltage regulator that causes supply voltage to rise above normal levels.

Key topics and technical requirements

  • Test purpose: Simulate coil supply regulator failure and assess relay performance under overvoltage.
  • Test conditions:
    • Preheat sample to 20 K below maximum operating temperature.
    • Apply 150% of nominal supply voltage (Un) (or manufacturer-specified maximum) for 60 min ± 6 min to all relevant inputs.
    • No forced convection in the chamber; protect DUT from drafts and artificial cooling. Use baffles if an air-circulating chamber is used.
  • Monitoring and instrumentation:
    • Monitor contacts for make/break events during the test.
    • Use at least two thermocouples on the coil surface (upper surface in test orientation) when measuring coil temperature.
  • Tolerances: Frequency ±5%, voltages ±0.2 V, resistance ±10% (unless otherwise specified). All voltage curves shown without load.
  • Evaluation and acceptance: DUT functional status must be monitored and recorded during and after the test. At test end the relay should be in an operating condition; stricter acceptance criteria may be specified (e.g., no functional change).
  • Reporting: Test report must include test voltage/duration deviations, functional status during and after the test, and sufficient details to reproduce the test.

Applications and users

This standard is practical for:

  • Relay manufacturers validating coil insulation and functional robustness.
  • Independent test laboratories performing type tests and qualification.
  • Design and quality engineers at OEMs (industrial, automotive, control systems) needing standardized overvoltage verification.
  • Certification bodies referencing harmonized test methods for safety and performance claims.

Keywords: coil overvoltage, electrical relays, IEC 63522-52, relay testing, overvoltage test, nominal voltage, test report.

Related standards

  • IEC 61810-1:2015 (electromechanical elementary relays - general and safety requirements)
  • IEC 63522-0 (series - general and guidance)
  • ISO 16750-1 / ISO 16750-2 (listed in bibliography for environmental and electrical loads)

Note: This CDV is still under study and subject to change; consult the final IEC/CENELEC publication for normative use.

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Frequently Asked Questions

EN IEC 63522-52:2026 is a draft published by CLC. Its full title is "Electrical relays - Tests and measurements - Part 52: Coil overvoltage". This standard covers: IEC 63522-52:2026 is used for testing all kind of electrical relays and for evaluating their ability to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a standard test method for coil overvoltage in device under test (DUT) equipped with a coil. is used for testing all kind of electrical relays and for evaluating their ability to perform under expected conditions of transportation, storage and all aspects of operational use.

IEC 63522-52:2026 is used for testing all kind of electrical relays and for evaluating their ability to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a standard test method for coil overvoltage in device under test (DUT) equipped with a coil. is used for testing all kind of electrical relays and for evaluating their ability to perform under expected conditions of transportation, storage and all aspects of operational use.

EN IEC 63522-52:2026 is classified under the following ICS (International Classification for Standards) categories: 29.120.70 - Relays. The ICS classification helps identify the subject area and facilitates finding related standards.

EN IEC 63522-52:2026 has the following relationships with other standards: It is inter standard links to prEN IEC 63522-0:2025, EN 61810-1:2015, EN 61810-1:2015/A1:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN IEC 63522-52:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
oSIST prEN IEC 63522-52:2024
01-oktober-2024
Električni releji - Preskusi in meritve -52. del: Prenapetostna tuljava
Electrical relays - Tests and Measurements - Part 52: Coil overvoltage
Relais électriques - Essais et Mesurages - Partie 52: Surtension aux bornes de la bobine
Ta slovenski standard je istoveten z: prEN IEC 63522-52:2024
ICS:
29.120.70 Releji Relays
oSIST prEN IEC 63522-52:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 63522-52:2024
oSIST prEN IEC 63522-52:2024
94/1043/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63522-52 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-08-09 2024-11-01
SUPERSEDES DOCUMENTS:
94/893/CD, 94/1008/CC
IEC TC 94 : ELECTRICAL RELAYS
SECRETARIAT: SECRETARY:
Austria Mr Bernhard Spalt
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electrical relays - Tests and Measurements - Part 52: Coil overvoltage

PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You
may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without permission in
writing from IEC.
oSIST prEN IEC 63522-52:2024
– 2 – IEC CDV 63522-52 © IEC 2024
1 CONTENTS
3 FOREWORD . 3
4 1 Scope . 5
5 2 Normative references . 5
6 3 Terms and definitions . 5
7 4 Test procedure . 5
8 4.1 Purpose . 5
9 4.2 Procedure . 5
10 4.3 Conditions . 6
11 5 Evaluation . 6
12 5.1 General . 6
13 5.2 Test report . 6
14 Bibliography . 7
16 Figure 1 – Typical test circuit . 6
oSIST prEN IEC 63522-52:2024
IEC CDV 63522-52 © IEC 2024 – 3 –
19 INTERNATIONAL ELECTROTECHNICAL COMMISSION
20 ____________
22 ELECTRICAL RELAYS – TESTS AND MEASUREMENTS –
24 Part 52: Coil overvoltage
26 FOREWORD
27 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
28 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
29 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
30 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
31 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
32 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
33 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
34 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
35 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
36 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
37 consensus of opinion on the relevant subjects since each technical committee has representation from all
38 interested IEC National Committees.
39 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
40 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
41 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
42 misinterpretation by any end user.
43 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
44 transparently to the maximum extent possible in their national and regional publications. Any divergence between
45 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
46 5) IEC itself does not provide any attestation of conformity. Independ
...


SLOVENSKI STANDARD
oSIST prEN IEC 63522-52:2025
01-maj-2025
Električni releji - Preskusi in meritve -52. del: Prenapetostna tuljava
Electrical relays - Tests and Measurements - Part 52: Coil overvoltage
Elektrische Relais – Mess- und Prüfverfahren – Teil 52: Spulenüberspannung
Relais électriques - Essais et Mesurages - Partie 52: Surtension aux bornes de la bobine
Ta slovenski standard je istoveten z: prEN IEC 63522-52:2025
ICS:
29.120.70 Releji Relays
oSIST prEN IEC 63522-52:2025 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 63522-52:2025
oSIST prEN IEC 63522-52:2025
94/1122/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63522-52 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-03-14 2025-05-09
SUPERSEDES DOCUMENTS:
94/1043/CDV, 94/1107/RVC
IEC TC 94 : ELECTRICAL RELAYS
SECRETARIAT: SECRETARY:
Austria Mr Bernhard Spalt
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electrical relays - Tests and Measurements - Part 52: Coil overvoltage

PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee
positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other
purpose without permission in writing from IEC.

oSIST prEN IEC 63522-52:2025
94/1122/CDV – 2 – IEC 2CDV 63522-52 © IEC 2025
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test procedure . 6
4.1 Purpose . 6
4.2 Procedure . 6
4.3 Conditions . 7
5 Evaluation . 7
5.1 General . 7
5.2 Test report . 7
Bibliography . 8

Figure 1 – Typical test circuit . 6

oSIST prEN IEC 63522-52:2025
IEC 2CDV 63522-52 © IEC 2025 – 3 – 94/1122/CDV
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL RELAYS –
TESTS AND MEASUREMENTS –
Part 52: Coil overvoltage
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 o
...

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