SIST EN IEC 63522-46:2026

• Abstract:

  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 impulse voltage test.

• Status: Published
• Public Enquiry End Date: 30-Jul-2025
• Publication Date: 13-Sep-2026
• 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
• Completion Date: 14-Sep-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

SIST EN IEC 63522-46:2026 is a SIST standard in the IEC 63522 series for electrical relays. It specifies a standard impulse voltage test method for checking whether relay insulation can withstand specified transient overvoltages during transportation, storage and operational use. Engineers, test laboratories, quality managers and buyers can use it to understand how the test is set up, what conditions apply, and what has to be recorded.

What does SIST EN IEC 63522-46:2026 specify?

SIST EN IEC 63522-46:2026 specifies one test method for devices under test (DUTs): the impulse voltage test. The document is organized into Scope, Normative references, Terms and definitions, Test procedure, Evaluation, and informative Annex A with an example test circuit.

The scope links the test to expected conditions in transport, storage and operation. In practice, that means the standard is about verifying insulation performance under a defined transient stress, not about general relay performance.

Annex	What it covers
Annex A	Example of a test circuit for impulse voltage test, with example test points and impulse waveform parameters

What are the key requirements of SIST EN IEC 63522-46:2026?

Test conditions and test setup

SIST EN IEC 63522-46:2026 requires the test to be run under the ambient conditions given in IEC 63522-0, Table 2, after conditioning for 1 h to 2 h at those conditions. This matters because the relay has to be tested in a controlled state that other laboratories can reproduce.

The impulse voltage is selected from IEC 60664-1, Table F.6, and the waveform follows IEC 61180:2016, 7.1, or the relevant product standard. Altitude correction from IEC 60664-1 also applies, so the test level remains meaningful when the test site is above sea level.

Application of the impulse test

SIST EN IEC 63522-46:2026 states that the impulse generator output impedance shall not be higher than 500 Ω. Annex A gives an example circuit, which helps a lab build a generator that produces the required impulse shape.

The test points are the terminals and housing specified in clause 4.3 b). The test is carried out with at least three impulses of each polarity unless the detail specification says otherwise, and the interval between impulses shall be at least 1 s. In practice, this tells the tester how many pulses to apply and how to connect the relay.

Preconditioning and conditions to be specified

SIST EN IEC 63522-46:2026 allows preconditioning when the relevant product standard requires it for a relay in new condition. Clause 4.3 lists the items that must be specified when they differ from the default method, including the number of impulse tests, the terminals or housing used, the impulse waveform, the output impedance, the peak voltage Vpeak, preconditioning details, leakage current, and the required final measurements. This is the part that a product standard or test plan uses to tailor the method to a specific relay.

Evaluation and reporting

SIST EN IEC 63522-46:2026 accepts the test only if leakage current stays within the specified limit and there is no breakdown or flashover. If applicable, the relay must also pass the functional tests in IEC 63522-7 and the dielectric strength test in IEC 63522-4.

Clause 5.2 requires a test report that contains enough information to reproduce the test. That includes the relay identification, altitude if above 2 000 m, preconditioning details, Vpeak, t1 and t2, test points, pulse count, pulse interval, waveform, generator impedance, final measurements and leakage current.

What terms does SIST EN IEC 63522-46:2026 define?

SIST EN IEC 63522-46:2026 uses the terms and definitions from IEC 63522-0. The test method also relies on a few practical terms:

• DUT - device under test, meaning the relay being evaluated.
• Impulse voltage - a transient overvoltage applied to stress the insulation.
• Preconditioning - any prior conditioning required before the test starts.
• Leakage current - current through the insulation during the test, limited by the detail specification.
• Breakdown - an insulation failure that is not allowed.
• Flashover - a surface discharge across insulation that is not allowed.
• Functional tests - post-test checks carried out in accordance with IEC 63522-7.

Who uses SIST EN IEC 63522-46:2026?

SIST EN IEC 63522-46:2026 is used by relay manufacturers, test laboratories, and quality or reliability teams that need a defined impulse voltage test for electrical relays. It is also useful for specification writers, buyers and auditors who need a clear test method for insulation verification and reporting.

Which standards are used with SIST EN IEC 63522-46:2026?

• IEC 63522-0 - gives the general guidance, terms and ambient conditions used by this part.
• IEC 60664-1:2020 and IEC 60664-1:2020/AMD1:2025 - provide the impulse voltage selection table and the altitude correction rules.
• IEC 61180:2016 - provides the high-voltage test technique and waveform requirements used for the impulse.
• IEC 63522-4 - provides the dielectric strength test used in final checking, if applicable.
• IEC 63522-7 - provides the functional tests used in final checking, if applicable.
• IEC 60060-1:2025 - is cited in Annex A for impulse time-parameter terminology and the figure source.
• IEC 61810-1, IEC 61810-10:2019, IEC 62246-1:2015, IEC 62246-1-1:2018 - are listed in the bibliography as related relay documents.

What does the SIST EN IEC 63522-46:2026 document contain?

Clause 4 gives the test purpose, preconditioning, test conditions and the required application of the impulse voltage. Clause 5 sets out the acceptance criteria and the reporting requirements. Annex A provides an example of a test circuit, a simplified combination wave generator diagram, typical impulse time parameters, and example test points for electrical relays.

Table A.1 shows example test points for relay terminals and housing connections. Figure A.1 shows the simplified circuit diagram of the combination wave generator, and Figure A.2 explains the impulse voltage time parameters.

SLOVENSKI STANDARD
01-oktober-2026
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: EN IEC 63522-46:2026
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63522-46

NORME EUROPÉENNE
EUROPÄISCHE NORM August 2026
ICS 29.120.70
English Version
Electrical relays - Tests and measurements - Part 46: Impulse
voltage test
(IEC 63522-46:2026)
Relais électriques - Essais et mesurage - Partie 46: Essai Elektrische Relais - Mess- und Prüfverfahren - Teil 46:
de tension de choc Überspannungsfestigkeitstest
(IEC 63522-46:2026) (IEC 63522-46:2026)
This European Standard was approved by CENELEC on 2026-07-14. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63522-46:2026 E

European foreword
The text of document 94/1198/FDIS, future edition 1 of IEC 63522-46, prepared by TC 94 "Electrical
relays" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-08-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-08-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document is read in conjunction with EN IEC 63522-0:– .
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 63522-46:2026 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60060-1:2025 NOTE Approved as EN IEC 60060-1:2025 (not modified)
IEC 61810-1 NOTE Approved as EN 61810-1
IEC 61810-10:2019 NOTE Approved as EN IEC 61810-10:2019 (not modified)
IEC 62246-1:2015 NOTE Approved as EN 62246-1:2015 (not modified)
IEC 62246-1-1:2018 NOTE Approved as EN IEC 62246-1-1:2018 (not modified)

Under preparation. Stage at the time of publication: prEN IEC 63522-0:2025.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60664-1 2020 Insulation coordination for equipment EN IEC 60664-1 2020
within low-voltage supply systems - Part 1:
Principles, requirements and tests
+ AMD1 2025 + A1 2025
IEC 61180 2016 High-voltage test techniques for low- EN 61180 2016
voltage equipment - Definitions, test and
procedure requirements, test equipment
IEC 63522-0 - Electrical relays - Tests and Measurements - -
- Part 0: General and Guidance
IEC 63522-4 - Electrical relays - Tests and measurements EN IEC 63522-4 -
- Part 4: Dielectric strength test
IEC 63522-7 - Electrical relays - Tests and measurements EN IEC 63522-7 -
- Part 7: Functional tests
IEC 63522-46 ®
Edition 1.0 2026-06
INTERNATIONAL
STANDARD
Electrical relays - Tests and measurements -
Part 46: Impulse voltage test
ICS 29.120.70  ISBN 978-2-8327-1259-7

IEC 63522-46:2026-06(en)
IEC 63522-46:2026 © IEC 2026
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 . 4
4.2.1 Preconditioning . 4
4.2.2 Test . 5
4.3 Conditions to be specified . 5
5 Evaluation . 5
5.1 General . 5
5.1.1 No breakdown . 5
5.1.2 Final checking . 6
5.2 Test report . 6
Annex A (informative) Example of test circuit for impulse voltage test . 7
Bibliography . 9

Figure A.1 – Simplified circuit diagram of the combination wave generator . 7
Figure A.2 – Full impulse voltage time parameters . 8

Table A.1 – Example of test points . 7

IEC 63522-46:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrical relays - Tests and measurements -
Part 46: Impulse voltage test
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