SIST EN IEC 63522-22:2025

Electrical relays - Tests and Measurements - Part -22: Limiting continuous current

IEC 63522-22:2025 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 evaluation of the limiting continuous current under specified conditions.

Elektrische Relais - Mess- und Prüfverfahren – Teil 22: Begrenzung des Dauerstroms

Relais électriques - Essais et mesurages - Partie 22: Courant limite de service continu

IEC 63522-22:2025 La présente partie de l'IEC 63522 traite des essais ainsi que des sévérités et conditions appropriées pour les mesurages et essais destinés à évaluer l'aptitude de DUT à fonctionner dans des conditions prévues de transport, de stockage, et de tous les aspects d'utilisation opérationnelle.
Le présent document définit une méthode d'essai normalisée pour l'évaluation du courant limite de service continu dans des conditions spécifiées.

Električni releji - Preskusi in meritve - 22. del: Stalna tokovna omejitev

Ta del standarda IEC 63522 se uporablja za preskušanje, vključno z ustreznimi stopnjami strogosti ter pogoji za meritve in preskuse, ki so bili zasnovani za ocenjevanje zmožnosti delovanja preskušanih naprav (DUT), v pričakovanih pogojih med transportom in skladiščenjem ter v vseh vidikih operativne uporabe.
Ta dokument določa standardno preskusno metodo za vrednotenje stalne tokovne omejitve v določenih pogojih.

General Information

• Status: Published
• Public Enquiry End Date: 27-Sep-2023
• Publication Date: 25-Jun-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: 11-Jun-2025
• Due Date: 16-Aug-2025
• Completion Date: 26-Jun-2025
• Ref Project: EN IEC 63522-22:2025 - Electrical relays - Tests and measurements - Part 22: Limiting continuous current

Overview

EN IEC 63522-22:2025 - Electrical relays - Tests and measurements - Part 22: Limiting continuous current - is the European adoption of IEC 63522-22:2025 prepared by TC 94 (Electrical relays). This standard defines a reproducible test method to evaluate the maximum continuous current that relay contacts can carry under specified conditions. It is intended to assess relay contact suitability during transportation, storage and normal operational use, and is read in conjunction with IEC 63522-0 (general guidance).

Key topics and requirements

• Purpose: Determine the limiting continuous current - the greatest current a closed contact can carry continuously under defined conditions.
• Test setup: Terminals and connections per IEC 63522-10 Annex A; coil energized at rated voltage (operate condition) or not energized for release/bistable tests.
• Loading procedure: Apply manufacturer-specified current to the contacts until thermal equilibrium is reached; allow cooling to ambient; then run ten operating cycles with rated coil voltage while monitoring contact opening/closing.
• Conditions to specify: energization value, limiting continuous current for normally open (NO) and normally closed (NC) contacts, and mounting situation.
• Evaluation criteria: No malfunction during the final 10 functional cycles. Electrical parameters must meet limits verified by complementary tests:
  • Contact-circuit resistance (IEC 63522-6)
  • Functional tests (IEC 63522-7)
  • Dielectric strength (IEC 63522-4)
  • Timing (IEC 63522-8)
• Reporting: Test report must allow reproducibility and include DUT description, method, deviations, ambient conditions, voltages/currents, number of cycles, duty cycle, energization values, limiting currents, mounting, and other observations.

Practical applications and users

• Who uses it: relay manufacturers, component test laboratories, OEMs (control systems, power distribution, automotive suppliers), R&D and quality assurance engineers, procurement and compliance teams, and certification bodies.
• Why it’s useful: Establishes a standardized approach to verify contact heating behavior and long‑term carrying capability, supporting design validation, product specifications, end‑user safety margins, and compliance testing.
• Typical use cases: specifying contact current ratings for product datasheets, validating relay selection in power control and switching applications, and documenting test evidence for product qualification and customer acceptance.

Related standards

• EN/IEC 63522-0 - Tests and measurements: General and guidance
• EN/IEC 63522-4 - Dielectric strength test
• EN/IEC 63522-6 - Contact-circuit resistance
• EN/IEC 63522-7 - Functional tests
• EN/IEC 63522-8 - Timing
• EN/IEC 63522-10 - Heating

Keywords: EN IEC 63522-22:2025, limiting continuous current, electrical relays, relay testing, contact-circuit resistance, dielectric test, relay functional test, thermal equilibrium, relay standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2025
Električni releji - Preskusi in meritve - 22. del: Stalna tokovna omejitev
Electrical relays - Tests and Measurements - Part -22: Limiting continuous current
Elektrische Relais - Mess- und Prüfverfahren – Teil 22: Begrenzung des Dauerstroms
Relais électriques - Essais et mesurages - Partie 22: Courant limite de service continu
Ta slovenski standard je istoveten z: EN IEC 63522-22:2025
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63522-22

NORME EUROPÉENNE
EUROPÄISCHE NORM June 2025
ICS 29.120.70
English Version
Electrical relays - Tests and measurements - Part 22: Limiting
continuous current
(IEC 63522-22:2025)
Relais électriques - Essais et mesurages - Partie 22: Elektrische Relais - Mess- und Prüfverfahren - Teil 22:
Courant limite de service continu Begrenzung des Dauerstroms
(IEC 63522-22:2025) (IEC 63522-22:2025)
This European Standard was approved by CENELEC on 2025-05-27. 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 63522-22:2025 E

European foreword
The text of document 94/1061/FDIS, future edition 1 of IEC 63522-22, 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) 2026-06-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-06-30
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 63522-22:2025 was approved by CENELEC as a European
Standard without any modification.

Under preparation. Stage at the time of publication: prEN IEC 63522-0:2024.
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
2 3
IEC 63522-0 — Electrical relays - Tests and Measurements EN IEC 63522-0 —
- Part 0: General and Guidance
4 5
IEC 63522-4 — Electrical relays - Tests and measurements EN IEC 63522-4 —
- Part 4: Dielectric strength test
IEC 63522-6 2025 Electrical relays - Tests and measurements EN IEC 63522-6 2025
- Part 6: Contact-circuit resistance or
voltage drop
IEC 63522-7 2025 Electrical relays - Tests and measurements EN IEC 63522-7 2025
- Part 7: Functional tests
IEC 63522-8 2024 Electrical relays - Tests and measurements EN IEC 63522-8 2024
- Part 8: Timing
6 7
IEC 63522-10 — Electrical relays - Tests and measurements EN IEC 63522-10 —
- Part 10: Heating
Under preparation. Stage at the time of publication: IEC CDV 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 FDIS 63522-4:2024.
Under preparation. Stage at the time of publication: FprEN 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 63522-22 ®
Edition 1.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Tests and measurements –

Part 22: Limiting continuous current

Relais électriques – Essais et mesurages –

Partie 22: Courant limite de service continu

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.70  ISBN 978-2-8327-0354-0

– 2 – IEC 63522-22:2025 © IEC 2025
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Test procedure . 6
4.1 Purpose . 6
4.2 Procedure . 6
4.3 Conditions . 6
5 Evaluation . 7
5.1 General . 7
5.2 Test report . 7
Bibliography . 8

IEC 63522-22:2025 © IEC 2025 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL RELAYS –
TESTS AND MEASUREMENTS –
Part 22: Limiting continuous current

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 cond
...