SIST EN IEC 63522-46:2026

• Status: Not Published
• Public Enquiry End Date: 30-Jul-2025
• ICS: 29.120.70 - Relays
• Technical Committee: ISS EIT.ERE - All-or-nothing electrical relays
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Sep-2026
• Due Date: 07-Nov-2026
• Ref Project: EN IEC 63522-46:2026 - Electrical relays - Tests and measurements - Part 46: Impulse voltage test

• Refers: SIST EN IEC 63522-4:2026 - Electrical relays - Tests and Measurements - Part 7-4: Dielectric strength test
• Effective Date: 07-Jul-2026
• Refers: SIST EN IEC 60664-1:2020 - Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests (IEC 60664-1:2020)
• Effective Date: 07-Jul-2026
• Refers: SIST EN 61180:2017 - High-voltage test techniques for low voltage equipment - Definitions, test and procedure requirements, test equipment
• Effective Date: 07-Jul-2026
• Refers: kSIST FprEN IEC 63522-0:2026 - Electrical relays - Tests and Measurements - Part 0: General and Guidance
• Effective Date: 07-Jul-2026
• Refers: SIST EN IEC 61810-7:2025 - Electrical relays - Tests and Measurements - Part 7: Functional Tests
• Effective Date: 07-Jul-2026
• Refers: SIST EN IEC 60664-1:2020/A1:2025 - Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests (IEC 60664-1:2020/AMD1:2025)
• Effective Date: 07-Jul-2026

Overview

SIST EN IEC 63522-46:2026 sets out the standardized requirements for conducting impulse voltage tests on electrical relays. This international standard, developed by the Slovenian Institute for Standardization (SIST) and aligned with IEC guidelines, defines procedures to assess the insulation’s ability to withstand specified transient overvoltages. Impulse voltage testing is a critical part of relay quality assurance, verifying that relays can safely operate under conditions simulating overvoltage events that may occur during transportation, storage, or normal operation.

Key Topics

• Impulse Voltage Test Method: Specifies a standardized approach to apply a defined impulse voltage waveform to relay insulation, mimicking transient electrical stresses.
• Preconditioning: Details if and when relays require preconditioning before the test, referencing related product standards.
• Test Conditions: Covers test setup, including ambient conditions, number and polarity of impulses, waveform parameters (such as 1.2/50 μs), and required output impedance for the impulse generator.
• Test Points: Identifies terminal combinations on relays where the impulse voltage is applied, ensuring thorough testing of all relevant insulation paths.
• Evaluation Criteria: Outlines acceptable performance, focusing on the absence of breakdowns or flashovers and compliance with leakage current limits.
• Test Reporting: Recommends comprehensive recording of test conditions, device identification, pulse characteristics, and outcomes to enable reproducibility and traceability.

Applications

• Relay Manufacturers: Enables consistent and objective quality verification during development, production, and batch testing. Ensures delivered relays meet global performance and safety norms regarding insulation.
• Testing Laboratories: Provides detailed procedures and reporting requirements for accredited third-party type or routine testing of relays, supporting compliance documentation.
• System Integrators & End-Users: Assures purchased relays are validated against standardized transient overvoltage resilience, supporting system reliability across energy, automation, transportation, and process control sectors.
• Standards & Regulatory Bodies: Serves as a reference for specifying testing methods in procurement, conformity assessment, and certification, fostering international harmonization of relay safety requirements.

Related Standards

SIST EN IEC 63522-46:2026 should be used in conjunction with other applicable relay and insulation coordination standards, including:

• IEC 60664-1: Insulation coordination for equipment within low-voltage supply systems
• IEC 61180: High-voltage test techniques for low-voltage equipment
• IEC 63522-0: General terms and definitions for relay tests and measurements
• IEC 63522-4: Dielectric strength test for electrical relays
• IEC 63522-7: Functional tests for electrical relays
• IEC 63522-42 (under development): EMC (electromagnetic compatibility) related surge immunity
• IEC 60060-1: General requirements for high-voltage test techniques

Practical Value

Adopting SIST EN IEC 63522-46:2026 in relay testing programs improves confidence in relay performance under stressful electrical events. It strengthens reliability by ensuring insulation is robust against impulse voltages and supports market access by aligning with internationally recognized testing standards for electrical relays. Clear, standardized reporting further enhances traceability and aids troubleshooting should product non-conformities arise.

Keywords: Electrical relays, impulse voltage test, relay insulation, IEC standards, SIST, relay testing, overvoltage, transient test, insulation coordination, quality assurance, international standard.

SLOVENSKI STANDARD
oSIST prEN IEC 63522-46:2024
01-julij-2024
Električni releji - Preskusi in meritve - 46. del: Preskus z udarno napetostjo
Electrical relays - Tests and measurements - Part 46: Impulse voltage test
Ta slovenski standard je istoveten z: prEN IEC 63522-46:2024
ICS:
29.120.70 Releji Relays
oSIST prEN IEC 63522-46:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 63522-46:2024
oSIST prEN IEC 63522-46:2024
94/1014/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63522-46 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-05-17 2024-08-09
SUPERSEDES DOCUMENTS:
94/897/CD, 94/1005/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” clau ses to be
included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses.
(SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electrical relays - Tests and Measurements - Part 46: Impulse voltage test

PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
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 writi ng from IEC.

oSIST prEN IEC 63522-46:2024
94/1014/CDV – 2 – IEC CDV 63522-46 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test procedure . 5
4.1 Purpose . 5
4.2 Procedure . 5
4.2.1 Precondition . 5
4.2.2 Test . 5
4.3 Conditions to be specified . 6
5 Evaluation . 6
5.1 No breakdown . 6
5.2 Final checking . 6
5.3 Test report . 6
(informative) Example of test circuit for impulse voltage test . 8
1,2/50 μs combination wave generator . 8
Bibliography . 10

Figure A.1 – Simplified circuit diagram of the combination wave generator . 8
Figure A.2 – Full impulse voltage time parameters . 9

Table A.1 – Example of test points . 8

oSIST prEN IEC 63522-46:2024
IEC CDV 63522-46 © IEC 2024 – 3 – 94/1014/CDV
2 INTERNATIONAL ELECTROTECHNICAL COMMISSION
3 ____________
5 ELECTRICAL RELAYS – Tests and Measurements –
7 Part 46: Impulse voltage test
9 FOREWORD
10 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
11 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
12 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
13 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
14 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
15 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
16 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
17 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
18 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
19 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
20 consensus of opinion on the relevant subjects since each technical committee has representation from all
21 interested IEC National Committees.
22 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
23 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
24 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
25 misinterpretation by any end user.
26 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
27 transparently to the maximum extent possible in their national and regional publications. Any divergence between
28 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
29 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
30 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
31 services carried out by independent certification bodies.
32 6) All users should ensure that they have the latest edition of this publication.
33 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
34 members of its technical committees and IEC National Committees for any personal injury, property damage or
35 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
36 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
37 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
38 indispensable for the correct application of this publication.
39 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
40 rights. IEC shall not be held responsible for identifying any or all such patent rights.
41 The International Standard of the IEC 63522-46 has been prepared by IEC technical committee
42 94: Electrical relays.
43 The text of this International Standard is based on the fo
...

SLOVENSKI STANDARD
oSIST prEN IEC 63522-46:2025
01-julij-2025
Električni releji - Preskusi in meritve - 46. del: Preskus z udarno napetostjo
Electrical relays - Tests and measurements - Part 46: Impulse voltage test
Elektrische Relais - Mess- und Prüfverfahren - Teil 46: Überspannungsfestigkeitstest
Relais électriques - Essais et mesurage - Partie 46: Essai de tension de choc
Ta slovenski standard je istoveten z: prEN IEC 63522-46:2025
ICS:
29.120.70 Releji Relays
oSIST prEN IEC 63522-46:2025 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 63522-46:2025
oSIST prEN IEC 63522-46:2025
94/1150/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63522-46 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-06-06 2025-08-01
SUPERSEDES DOCUMENTS:
94/1014/CDV, 94/1140/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 46: Impulse voltage test

PROPOSED STABILITY DATE: 2026
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 63522-46:2025
2 IEC 63522-46 ED1 © IEC 2025
1 CONTENTS
3 FOREWORD . 3
4 1 Scope . 5
5 2 Normative references . 5
6 3 Terms and definitions . 5
7 4 Test procedure . 6
8 4.1 Purpose . 6
9 4.2 Procedure . 6
10 4.2.1 Preconditioning . 6
11 4.2.2 Test . 6
12 4.3 Conditions to be specified . 6
13 5 Evaluation . 7
14 5.1 General . 7
15 5.1.1 No breakdown . 7
16 5.1.2 Final checking . 7
17 5.2 Test report . 7
18 Annex A (informative) Example of test circuit for impulse voltage test . 8
19 Bibliography . 10
21 Figure A.1 – Simplified circuit diagram of the combination wave generator . 8
22 Figure A.2 – Full impulse voltage time parameters . 9
24 Table A.1 – Example of test points . 8
oSIST prEN IEC 63522-46:2025
IEC 63522-46 ED1 © IEC 2025 3
27 INTERNATIONAL ELECTROTECHNICAL COMMISSION
28 ____________
30 ELECTRICAL RELAYS –
31 TESTS AND MEASUREMENTS –
33 Part 46: Impulse voltage test
35 FOREWORD
36 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
37 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
38 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
39 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
40 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
41 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
42 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
43 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
44 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
45 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
46 consensus of opinion on the relevant subjects since each technical committee has representation from all
47 interested IEC National Committees.
48 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
49 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
50 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
51 misinterpretation by any end user.
52 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
53 transparently to the maximum extent possible in their national and regional publications. Any divergence between
54 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
55 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
56 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
57 services carried out by independent certification bodies.
58 6) All users should ensure that they have the latest edition of this publication.
59 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
60 members of its technical committees and IEC National Committees for any personal injury, property damage or
61 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
62 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
63 Publications.
64 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
65 indispensable for the correct application of this publication.
66 9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
67 patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
68 respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
69 may be required to implement this document. However, implementers are cautioned that this may not represent
70 the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
71 shall not be held responsible for identifying any or all such patent rights.
72 IEC 63522-46 has been prepared by IEC technical committee 94: Electrical relays. It is an
73 International Standard.
74 The text of this International Standard is based on the following documents:
Draft Report on voting
94/1014/CDV 94/1140/RVC
76 Full information
...