SIST EN IEC 60255-26:2025
(Main)Measuring relays and protection equipment - Part 26: Electromagnetic compatibility requirements
Measuring relays and protection equipment - Part 26: Electromagnetic compatibility requirements
1.1 General
This part of the IEC 60255 series specifies the requirements for electromagnetic compatibility for measuring relays and protection equipment. It is applicable to measuring relays and protection equipment and combinations of devices to form schemes for power system protection including the control, monitoring, communication and process interface equipment used with those systems.
Tests specified in this document are not required for equipment not incorporating electronic circuits, for example electromechanical relays.
The requirements specified in this document are applicable to measuring relays and protection equipment in a condition representative of how new equipment is provided by the manufacturer. All tests specified are type tests only.
1.2 Emission
This document specifies limits and test methods, for measuring relays and protection equipment in relation to electromagnetic emissions which might cause interference in other equipment.
These emission limits represent electromagnetic compatibility requirements and have been selected to ensure that the disturbances generated by measuring relays and protection equipment, operated normally in substations and power plants, do not exceed a specified level which could prevent other equipment from operating as intended.
Test requirements are specified for the enclosure, auxiliary power supply ports, input/output ports, signal/control ports and wired network ports.
1.3 Immunity
This document specifies the immunity test requirements for measuring relays and protection equipment in relation to continuous and transient, conducted and radiated disturbances, including electrostatic discharges.
These test requirements represent the electromagnetic compatibility immunity requirements and have been selected so as to ensure an adequate level of immunity for measuring relays and protection equipment, operated normally in substations and power plants.
NOTE 1 Product safety considerations are not covered in this document.
NOTE 2 In special cases, situations will arise where the levels of disturbance could exceed the levels specified in this document, for example where a hand-held transmitter or a mobile telephone is used close to measuring relays and protection equipment. In these instances, special precautions and procedures could have to be employed.
Messrelais und Schutzeinrichtungen - Teil 26: Anforderungen an die elektromagnetische Verträglichkeit
Relais de mesure et dispositifs de protection - Partie 26: Exigences de compatibilité électromagnétique
La CEI 60255-26:2013 est applicable aux relais de mesure et dispositifs de protection, y compris toute combinaison de dispositifs pour former des systèmes pour la protection de réseaux d'alimentation tels que des dispositifs de commande, de surveillance de communication et d'interface processus utilisées avec ces systèmes. Cette norme spécifie les exigences de compatibilité électromagnétique pour les relais de mesure et dispositifs de protection. Les exigences spécifiées dans cette norme sont applicables aux relais de mesure et dispositifs de protection à l'état neuf et tous les essais décrits sont des essais de type. Cette nouvelle édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - définition des spécifications d'essais, des procédures d'essais et des critères d'acceptation par phénomène et accès sous test en un seul document; - extension de la mesure des émissions rayonnées pour les fréquences au-delà de 1 GHz; - limitation de la mesure des émissions rayonnées à une distance de 3 m seulement pour les petits matériels; - ajout d'un niveau d'essai zone A et zone B pour l'essai d'onde de choc; - extension des essais de creux de tension a.c et d.c, de composante a.c. (ondulation) en d.c et de coupure/rétablissement progressif sur les accès d'alimentation auxiliaire; - harmonisation des critères d'acceptation pour les essais d'immunité.
Merilni releji in zaščitna oprema - 26. del: Zahteve za elektromagnetno združljivost
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Nadomešča:
SIST EN 60255-26:2014
SIST EN 60255-26:2014/AC:2014
Merilni releji in zaščitna oprema - 26. del: Zahteve za elektromagnetno združljivost
Measuring relays and protection equipment - Part 26: Electromagnetic compatibility
requirements
Messrelais und Schutzeinrichtungen - Teil 26: Anforderungen an die elektromagnetische
Verträglichkeit
Relais de mesure et dispositifs de protection - Partie 26: Exigences de compatibilité
électromagnétique
Ta slovenski standard je istoveten z: EN IEC 60255-26:2025
ICS:
29.120.70 Releji Relays
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60255-26
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2025
ICS 29.120.70 Supersedes EN 60255-26:2013; EN 60255-
26:2013/AC:2013
English Version
Measuring relays and protection equipment - Part 26:
Electromagnetic compatibility requirements
(IEC 60255-26:2023)
Relais de mesure et dispositifs de protection - Partie 26: Messrelais und Schutzeinrichtungen - Teil 26:
Exigences de compatibilité électromagnétique Anforderungen an die elektromagnetische Verträglichkeit
(IEC 60255-26:2023) (IEC 60255-26:2023)
This European Standard was approved by CENELEC on 2024-10-16. 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 60255-26:2025 E
European foreword
The text of document 95/515/FDIS, future edition 4 of IEC 60255-26, prepared by TC 95 "Measuring
relays and protection equipment" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60255-26:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-04-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-04-30
document have to be withdrawn
This document supersedes EN 60255-26:2013 and all of its amendments and corrigenda (if any).
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 60255-26:2023 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61000-4 series NOTE Approved as EN 61000-4 series
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 60255-1 2022 Measuring relays and protection equipment EN IEC 60255-1 2023
- Part 1: Common requirements
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - Part EN 61000-4-2 2009
4-2: Testing and measurement techniques
- Electrostatic discharge immunity test
IEC 61000-4-3 2020 Electromagnetic compatibility (EMC) - Part EN IEC 61000-4-3 2020
4-3 : Testing and measurement techniques
- Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) - Part EN 61000-4-4 2012
4-4: Testing and measurement techniques
- Electrical fast transient/burst immunity
test
IEC 61000-4-5 2014 Electromagnetic compatibility (EMC) - Part EN 61000-4-5 2014
4-5: Testing and measurement techniques
- Surge immunity test
+ A1 2017 + A1 2017
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) - Part EN 61000-4-6 2014
4-6: Testing and measurement techniques
- Immunity to conducted disturbances,
induced by radio-frequency fields
- - + AC 2015
IEC 61000-4-8 2009 Electromagnetic compatibility (EMC) - Part EN 61000-4-8 2010
4-8: Testing and measurement techniques
- Power frequency magnetic field immunity
test
Publication Year Title EN/HD Year
IEC 61000-4-11 2020 Electromagnetic compatibility (EMC) - Part EN IEC 61000-4-11 2020
4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests for equipment with input
current up to 16 A per phase
- - + AC 2020
- - + AC 2022
IEC 61000-4-16 2015 Electromagnetic compatibility (EMC) - Part EN 61000-4-16 2016
4-16: Testing and measurement
techniques - Test for immunity to
conducted, common mode disturbances in
the frequency range 0 Hz to 150 kHz
IEC 61000-4-17 1999 Electromagnetic compatibility (EMC) - Part EN 61000-4-17 1999
4-17: Testing and measurement
techniques - Ripple on d.c. input power
port immunity test
+ A1 2001 + A1 2004
+ A2 2008 + A2 2009
IEC 61000-4-18 2019 Electromagnetic compatibility (EMC) - Part EN IEC 61000-4-18 2019
4-18: Testing and measurement
techniques - Damped oscillatory wave
immunity test
IEC 61000-4-29 2000 Electromagnetic compatibility (EMC) - Part EN 61000-4-29 2000
4-29: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations on d.c.
input power port immunity tests
CISPR 11 (mod) 2015 Industrial, scientific and medical equipment EN 55011 2016
- Radio-frequency disturbance
characteristics - Limits and methods of
measurement
+ A1 2016 + A1 2017
- - + A11 2020
+ A2 2019 + A2 2021
CISPR 32 2015 Electromagnetic compatibility of multimedia EN 55032 2015
equipment - Emission requirements
- - + AC 2016-07
+ A1 2019 + A1 2020
- - + A11 2020
IEC 60255-26 ®
Edition 4.0 2023-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Measuring relays and protection equipment –
Part 26: Electromagnetic compatibility requirements
Relais de mesure et dispositifs de protection –
Partie 26: Exigences de compatibilité électromagnétique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.70 ISBN 978-2-8322-6317-4
– 2 – IEC 60255-26:2023 © IEC 2023
CONTENTS
FOREWORD . 5
1 Scope . 7
1.1 General . 7
1.2 Emission . 7
1.3 Immunity . 7
2 Normative references . 7
3 Terms, definitions, and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 12
4 Electromagnetic environmental levels . 13
4.1 General . 13
4.2 Zone A, severe electromagnetic environment . 13
4.3 Zone B, typical electromagnetic environment . 14
5 Emission. 14
5.1 Radiated emission . 14
5.2 Conducted emission . 15
6 Immunity. 16
6.1 Immunity of enclosure . 16
6.2 Immunity of auxiliary power supply port . 17
6.3 Immunity of signal/control port and wired network port . 20
6.4 Immunity of input and output ports . 21
6.5 Immunity of earth port . 24
7 Test set-up and procedures . 24
7.1 General . 24
7.2 Emission . 25
7.2.1 General . 25
7.2.2 Radiated emission . 26
7.2.3 Conducted emission . 26
7.3 Immunity . 26
7.3.1 General . 26
7.3.2 Electrostatic discharge immunity test . 28
7.3.3 Radiated electromagnetic field immunity test . 29
7.3.4 Electrical fast transient/burst immunity test . 31
7.3.5 Damped oscillatory wave immunity test . 32
7.3.6 Surge immunity test . 33
7.3.7 Conducted RF immunity test . 35
7.3.8 Conducted power frequency immunity test on binary inputs . 37
7.3.9 Power frequency magnetic field immunity test . 38
7.3.10 Voltage dips and short interruptions test (AC or DC) . 38
7.3.11 Ripple on DC input power port immunity test . 39
7.3.12 Gradual shutdown / start-up tests . 40
8 Criteria for acceptance . 40
8.1 Emission . 40
8.2 Immunity . 41
9 Test report . 42
(normative) Power frequency immunity tests on binary inputs . 43
IEC 60
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.