SIST EN IEC 63522-54:2025
(Main)Electrical relays - Tests and measurements - Part 54: Critical DC load current test
Electrical relays - Tests and measurements - Part 54: Critical DC load current test
IEC 63522-54:2025 is used for testing all kinds 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 critical DC load current test.
Elektrische Relais – Mess- und Prüfverfahren – Teil 54: Kritischer DC-Laststromtest
Relais électriques - Essais et mesurages - Partie 54: Essai de courant continu critique de charge
IEC 63522-54:2025 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 pour l'essai de courant continu critique de charge.
Električni releji - Preskusi in meritve - 54. del: Preskus kritičnega enosmernega obremenitvenega toka
General Information
- Status
- Published
- Public Enquiry End Date
- 30-Nov-2024
- Publication Date
- 05-Nov-2025
- Technical Committee
- ISS EIT.ERE - All-or-nothing electrical relays
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 16-Oct-2025
- Due Date
- 21-Dec-2025
- Completion Date
- 06-Nov-2025
Overview
SIST EN IEC 63522-54:2025, published by CLC, defines the standard test method for the critical DC load current test on electrical relays. This standard focuses on evaluating the performance and reliability of various types of electrical relays-such as electromechanical, reed, and solid-state relays-under operational, storage, and transportation conditions. It sets requirements and procedures to assess their ability to switch critical direct current loads safely and effectively, ensuring robust operation in real-world applications.
Key Topics
Scope and Applicability: This standard applies broadly to all electrical relays used in DC applications, including time relays and technology combinations. It targets relays operating under conditions that may differ from general use, ensuring that they can handle critical DC load currents without compromising performance.
Test Procedure: The procedure involves subjecting relays to DC currents at various levels (4 A, 8 A, 16 A, 32 A, and 63 A DC), with operations repeated to identify the maximum current they can switch safely (the critical current). Test specifications include:
- Operating at maximum rated DC voltage
- Conducting ten operations per current value, splitting operations into forward and reverse current flow where polarity is not fixed
- Monitoring and recording arcing time during switching
- Conditions such as test temperature, current direction, closing time, and mounting direction specified by the manufacturer or standardized parameters
Evaluation Criteria: The arcing time-the duration of electrical discharge during switching-must not exceed 1 second at the critical current. A reliability test of 50 repeated operations at this current ensures consistent performance. Following this test, dielectric strength is verified according to IEC 63522-4 to confirm insulation integrity.
Operational Conditions: Test conditions reflect challenging operational environments, including different mounting directions and the presence of fault current protection devices. The standard also defines the number of allowable operating cycles per hour based on the relay’s rated current, ensuring tests simulate realistic usage scenarios.
Applications
The EN IEC 63522-54 standard is essential for manufacturers, testing laboratories, and users of electrical relays, providing a rigorous benchmark to:
- Qualify Electrical Relays for DC Load Applications: Ensuring relays can switch direct current loads safely in industrial, transportation, and storage scenarios.
- Guarantee Relay Durability and Safety: Preventing relay failures, reducing downtime, and extending operational lifetimes under critical DC conditions.
- Support Compliance and Certification: Aiding compliance with international electrotechnical requirements and improving customer confidence in product quality.
- Guide Design and Engineering: Helping engineers optimize relay designs for reliable performance in harsh environments or specialized applications.
Related Standards
SIST EN IEC 63522-54:2025 complements several parts of the IEC 63522 series focused on relay testing and measurements, including:
- IEC 63522-0 – General and guidance on electrical relay tests and measurements
- IEC 63522-4 – Dielectric strength test specifications for electrical relays
- IEC 63522-10 – Heating tests relevant to relay operation under load
These related standards collectively ensure comprehensive testing-covering mechanical, electrical, and environmental aspects-to verify relay safety, reliability, and performance.
By adhering to SIST EN IEC 63522-54:2025, organizations benefit from a standardized approach to evaluating electrical relays’ critical DC load handling, promoting product excellence and enhanced operational safety in numerous electrotechnical applications.
Frequently Asked Questions
SIST EN IEC 63522-54:2025 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Electrical relays - Tests and measurements - Part 54: Critical DC load current test". This standard covers: IEC 63522-54:2025 is used for testing all kinds 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 critical DC load current test.
IEC 63522-54:2025 is used for testing all kinds 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 critical DC load current test.
SIST EN IEC 63522-54:2025 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.
You can purchase SIST EN IEC 63522-54:2025 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Električni releji - Preskusi in meritve - 54. del: Preskus kritičnega enosmernega
obremenitvenega toka
Electrical relays - Tests and measurements - Part 54: Critical DC load current test
Elektrische Relais – Mess- und Prüfverfahren – Teil 54: Kritischer DC-Laststromtest
Relais électriques - Essais et mesurages - Partie 54: Essai de courant continu critique de
charge
Ta slovenski standard je istoveten z: EN IEC 63522-54:2025
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 63522-54
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2025
ICS 29.120.70
English Version
Electrical relays - Tests and measurements - Part 54: Critical DC
load current test
(IEC 63522-54:2025)
Relais électriques - Essais et mesurages - Partie 54: Essai Elektrische Relais - Mess- und Prüfverfahren - Teil 54:
de courant continu critique de charge Kritischer DC-Laststromtest
(IEC 63522-54:2025) (IEC 63522-54:2025)
This European Standard was approved by CENELEC on 2025-10-01. 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63522-54:2025 E
European foreword
The text of document 94/1141/FDIS, future edition 1 of IEC 63522-54, 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) 2026-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-10-31
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.
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 63522-54:2025 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 61810-1:2015 NOTE Approved as EN 61810-1:2015 (not modified)
IEC 61810-1:2015/A1:2019 NOTE Approved as EN 61810-1:2015/A1:2020 (not modified)
IEC 61810-10:2019 NOTE Approved as EN IEC 61810-10:2019 (not modified)
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
1 2
IEC 63522-0 — Electrical relays - Tests and Measurements - EN IEC 63522-0 —
Part 0: General and Guidance
3 4
IEC 63522-4 — Electrical relays - Tests and measurements - EN IEC 63522-4 —
Part 4: Dielectric strength test
5 6
IEC 63522-10 — Electrical relays - Tests and measurements - EN IEC 63522-10 —
Part 10: Heating
Under preparation. Stage at the time of publication: IEC PRVC 63522-0:2024.
Under preparation. Stage at the time of publication: prEN IEC 63522-0:2024.
Under preparation. Stage at the time of publication: IEC PRVD 63522-4:2024.
Under preparation. Stage at the time of publication: prEN IEC 63522-4:2024.
Under preparation. Stage at the time of publication: IEC FDIS 63522-10:2024.
Under preparation. Stage at the time of publication: FprEN IEC 63522-10:2025.
IEC 63522-54 ®
Edition 1.0 2025-08
INTERNATIONAL
STANDARD
Electrical relays - Tests and measurements -
Part 54: Critical DC load current test
ICS 29.120.70 ISBN 978-2-8327-0666-4
IEC 63522-54:2025-08(en)
IEC 63522-54:2025 © IEC 2025
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 . 5
4.3 Conditions . 6
5 Evaluation . 6
5.1 General . 6
5.2 Test report . 7
Bibliography . 8
Table 1 – Number of operating cycles per hour . 6
IEC 63522-54:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrical relays -
Tests and measurements -
Part 54: Critical DC load current test
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
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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
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