SIST EN IEC 63522-27:2025

Electrical relays - Testing and measurement - Part 27: Electrical contact noise

IEC 63522-27:2025 This part of IEC 63522 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 electrical contact noise.

Elektrische Relais - Mess- und Prüfverfahren - Teil 27: Elektrische Kontaktgeräusche

Relais électriques - Essais et mesurages - Partie 27: Bruit électrique de contact

IEC 63522-27:2025 La présente partie de l'IEC 63522 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 le bruit électrique de contact.

Električni releji - Preskusi in meritve - 27. del: Hrup elektičnega kontakta

Ta del standarda IEC 63522 se uporablja za preskušanje vseh vrst električnih relejev in vrednotenje njihove zmožnosti delovanja v pričakovanih pogojih med transportom in skladiščenjem ter v vseh vidikih operativne uporabe.
OPOMBA 1: Primeri električnih relejev za potrebe tega dokumenta vključujejo elektromehanske releje, releje reed, kontakte reed, stikala reed, polprevodniške releje, časovne releje in njihove tehnološke kombinacije.
Ta dokument določa standardno preskusno metodo za hrup električnega kontakta.
OPOMBA 2: Meritev hrupa električnega kontakta je odvisna od zasnove releja in preskusnih nastavitev, zato nanjo vpliva veliko parametrov. Za učinkovito merjenje hrupa električnega kontakta se je priporočljivo glede celotne nastavitve dogovoriti s stranko.

General Information

• Status: Published
• Public Enquiry End Date: 31-Jul-2024
• 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 63522-27:2025 - Electrical relays - Tests and measurement - Part 27: Electrical contact noise

Overview

EN IEC 63522-27:2025 (IEC 63522-27:2025) defines a standard test method for measuring electrical contact noise in electrical relays. It applies to all kinds of relays (electromechanical, reed relays/switches, solid-state relays, time relays and combinations) and is intended to evaluate relay performance under expected conditions of transportation, storage and operational use. The document specifies how to set up the test, what parameters to record and how to report results so measured contact noise can be compared to specified limits.

Key topics and requirements

• Scope and purpose
  • Standard procedure for checking that contact noise does not exceed specified limits under defined conditions.
  • Defines “contact noise” as spurious voltage appearing across the terminals of a closed contact.
• Test circuit & conditions
  • Typical circuit: relay contact inserted in a circuit formed of a 1 MΩ resistor and a 24 V DC source (unless otherwise specified).
  • Relay energized at rated coil voltage; conductor cross-section per IEC 63522-0 guidance.
• Measurement equipment
  • Noise measured using an oscilloscope or noise-level meter.
  • Oscilloscope bandwidth requirement: DC to 1 MHz.
  • Filters may or may not be used as specified for the test; presence/characteristics of filter must be recorded.
• Optional stress conditions
  • Relay may be subjected to shock and/or vibration if requested by the manufacturer or specification.
• Parameters to specify
  • Energization value(s), shock/vibration parameters, exact test circuit, waveform expectations, measuring equipment, noise limits, filter specification.
• Evaluation and reporting
  • Measured contact noise must not exceed specified limits.
  • Test report should contain all data necessary to reproduce the test: energization values, shock/vibration details, test circuit, measured waveform, measuring equipment, limits, filter, resistor and voltage source.

Applications and users

• Useful for relay manufacturers, component test laboratories, OEMs (industrial controls, automotive, telecommunications), quality assurance teams and product specifiers who need validated, repeatable measurements of contact noise.
• Helps ensure reliable switching performance in noise-sensitive circuits, provides a basis for product specifications, and supports compliance testing during design validation, production testing and incoming inspection.

Related standards

• EN IEC 63522-27 is to be used in conjunction with IEC/EN IEC 63522-0:– (Electrical relays - Tests and measurements - Part 0: General and guidance), which provides general test guidance and conductor sizing.

Keywords: electrical relays, contact noise, IEC 63522-27, EN IEC 63522-27:2025, relay testing, oscilloscope DC–1 MHz, 1 MΩ resistor, 24 V DC, shock and vibration, test report.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2025
Električni releji - Preskusi in meritve - 27. del: Hrup elektičnega kontakta
Electrical relays - Testing and measurement - Part 27: Electrical contact noise
Elektrische Relais - Mess- und Prüfverfahren - Teil 27: Elektrische Kontaktgeräusche
Relais électriques - Essais et mesurages - Partie 27: Bruit électrique de contact
Ta slovenski standard je istoveten z: EN IEC 63522-27:2025
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63522-27

NORME EUROPÉENNE
EUROPÄISCHE NORM June 2025
ICS 29.120.70
English Version
Electrical relays - Testing and measurement - Part 27: Electrical
contact noise
(IEC 63522-27:2025)
Relais électriques - Essais et mesurages - Partie 27: Bruit Elektrische Relais - Mess- und Prüfverfahren - Teil 27:
électrique de contact Elektrische Kontaktgeräusche
(IEC 63522-27:2025) (IEC 63522-27:2025)
This European Standard was approved by CENELEC on 2025-05-28. 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 63522-27:2025 E

European foreword
The text of document 94/1126/FDIS, future edition 1 of IEC 63522-27, 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 63522-27:2025 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

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.
IEC 63522-27 ®
Edition 1.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Testing and measurement –

Part 27: Electrical contact noise

Relais électriques – Essais et mesurages –

Partie 27: Bruit électrique de contact

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.70  ISBN 978-2-8327-0361-8

– 2 – IEC 63522-27:2025 © 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 to be specified . 6
5 Evaluation . 6
5.1 General . 6
5.2 Test report . 7
Bibliography . 8

IEC 63522-27:2025 © IEC 2025 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL RELAYS –
TESTS AND MEASUREMENTS –
Part 27: Electrical contact noise

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 s
...