IEC 60255-1:2022

Measuring relays and protection equipment - Part 1: Common requirements

IEC 60255-1:2022 specifies common rules and requirements applicable to measuring relays and protection equipment, including any combination of equipment to form a distributed protection scheme for power system protection such as control, monitoring and process interface equipment, to obtain uniformity of requirements and tests. This document covers the main technologies in use today; other emerging technologies present specific EMC and safety issues but the philosophy in this document will be applied.
This second edition cancels and replaces the first edition published in 2009. This edition includes the following significant technical changes with respect to the previous edition:
a. scope of document clarified;
b. merging units and communications as an integral part of the protection added;
c. binary output clarification expanded;
d. environmental operating conditions added (Annex B);
e. test reference conditions added;
f. multiple changes to improve understanding across most clauses;
g. derating by manufacturer added;
h. safety and EMC tests removed from document and referenced only;
i. relay setting and type test guidelines modified (Annex A)
j. battery monitor port and low power instrument transformers added.

Relais de mesure et dispositifs de protection - Partie 1: Exigences communes

lEC 60255-1:2022 spécifie les exigences et les règles communes applicables aux relais de mesure et aux dispositifs de protection, y compris toute combinaison de matériel pour former un système de protection distribué pour la protection des réseaux d'alimentation, tel que des dispositifs de commande, de surveillance et d'interface de processus, afin d'obtenir l'uniformité des exigences et des essais. Le présent document couvre les principales technologies utilisées actuellement. D'autres technologies émergentes présentent des problèmes de CEM et de sécurité spécifiques, mais la philosophie du présent document est appliquée.
Cette deuxième édition annule et remplace la première édition parue en 2009. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a. clarification du domaine d'application du document;
b. ajout des concentrateurs et des communications en tant que partie intégrante de la protection;
c. extension de la clarification des sorties binaires;
d. ajout des conditions d'environnement de fonctionnement (Annexe B);
e. ajout des conditions de référence pour les essais;
f. apport de modifications multiples qui visent à améliorer la compréhension à la plupart des articles;
g. ajout du détarage par le fabricant;
h. suppression des essais de sécurité et de CEM du document, auxquels il est seulement fait référence;
j. modification des lignes directrices relatives au réglage des relais et aux essais de type (Annexe A);
k. ajout de l'accès de surveillance de batterie et des transformateurs de mesure de faible puissance.

General Information

• Status: Published
• Publication Date: 14-Dec-2022
• ICS: 29.120.70 - Relays
• Technical Committee: TC 95 - Measuring relays and protection equipment
• Drafting Committee: MT 3 - TC 95/MT 3
• Current Stage: PPUB - Publication issued
• Start Date: 30-Dec-2022
• Completion Date: 15-Dec-2022

Relations

• Revises: IEC 60255-1:2009 - Measuring relays and protection equipment - Part 1: Common requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60255-1
®

Edition 2.0 2022-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Measuring relays and protection equipment –
Part 1: Common requirements

Relais de mesure et dispositifs de protection –
Partie 1: Exigences communes

IEC 60255-1:2022-12(en-fr)

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IEC 60255-1

®


Edition 2.0 2022-12




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Measuring relays and protection equipment –

Part 1: Common requirements



Relais de mesure et dispositifs de protection –

Partie 1: Exigences communes
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.120.70 ISBN 978-2-8322-6120-0




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 60255-1:2022 © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 15
4 Environmental conditions . 15
4.1 General . 15
4.2 Normal environmental conditions . 16
4.3 Special environmental conditions . 16
4.4 Environmental storage conditions . 16
4.5 Transport conditions . 16
5 Ratings . 16
5.1 General . 16
5.2 Rated voltage . 17
5.2.1 Input energizing voltage. 17
5.2.2 Auxiliary power supply port energizing voltage. 17
5.2.3 Rated insulation voltage . 17
5.3 Rated current – Input energizing current . 17
5.3.1 Primary relay . 17
5.3.2 Secondary relay . 17
5.4 Binary input and output port . 18
5.4.1 Binary input port . 18
5.4.2 Binary output port . 18
5.5 Transducer analogue input and output port . 19
5.5.1 Transducer analogue input port . 19
5.5.2 Transducer analogue output port . 19
5.6 Frequency . 19
5.6.1 Rated frequency . 19
5.6.2 Frequency operating range . 19
5.7 Rated burden . 19
5.8 Rated ambient temperature range . 20
6 Design and construction . 20
6.1 Marking . 20
6.2 Dimensions . 20
6.3 Enclosure protection . 20
6.4 Product safety requirements . 20
6.5 Functional performance requirements . 20
6.5.1 General . 20
6.5.2 Intrinsic accuracy . 21
6.5.3 Operating accuracy. 22
6.5.4 Performance under system conditions . 22
6.5.5 Performance of multifunctional protection equipment . 22
6.5.6 Internal user programmable logic . 22
6.6 Communication protocols . 22

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IEC 60255-1:2022 © IEC 2022 – 3 –
6.7 Cybersecurity . 22
6.8 Binary input and output port . 23
6.8.1 Binary input port . 23
6.8.2 Binary output port . 23
6.9 Transducer analogue input and output port . 23
6.9.1 Transducer analogue input port . 23
6.9.2 Transducer analogue output port . 23
6.10 Input circuit for measurement quantities . 23
6.10.1 Analogue voltage port . 23
6.10.2 Analogue current port . 23
6.10.3 Communication port . 24
6.11 Binary output performance (mechanical and static) . 24
6.12 Climatic performance . 24
6.12.1 General . 24
6.12.2 Verification procedure . 24
6.12.3 Climatic environmental tests . 25
6.13 Mechanical requirements . 29
6.13.1 Vibration response and endurance (sinusoidal) . 29
6.13.2 Shock response, shock withstand and bump . 29
6.13.3 Seismic risk . 29
6.14 Pollution . 29
6.15 Electromagnetic compatibility (EMC) . 29
7 Tests . 29
7.1 Test reference conditions . 29
7.2 Test overview . 30
7.3 Burden measurements . 32
7.3.1 Burden for analogue voltage inputs . 32
7.3.2 Burden for analogue current inputs . 32
7.3.3 Burden for AC power supply . 32
7.3.4 Burden for DC power supply . 32
7.3.5 Burden for binary input . 33
7.4 Type test report content . 33
8 Marking, labelling and packaging . 34
9 Product documentation and technical data . 34
Annex A (normative) Type testing guidelines . 35
A.1 General . 35
A.2 Protection setting . 35
A.2.1 Introductory remark . 35
A.2.2 Test philosophy . 35
A.2.3 Overcurrent and undercurrent . 36
A.2.4 Overvoltage and undervoltage . 37
A.2.5 Over frequency and under frequency . 38
A.2.6 Functions set around current, voltage and frequency . 38
A.2.7 Other functions . 39
Annex B (informative) Environmental operating locations . 40
B.1 Operating environment . 40
B.2 Operating conditions . 40
Bibliography . 44

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– 4 – IEC 60255-1:2022 © IEC 2022

Figure 1 – Ports for measuring relays and protection equipment . 13
Figure 2 – Binary output parameters . 19
Figure A.1 – Settings selection criteria . 36

Table 1 – Normal environmental conditions . 16
Table 2 – Contact performance requirements . 18
Table 3 – Hot and cold temperatures . 20
Table 4 – Dry heat test – Operational. 25
Table 5 – Cold test – Operational . 26
Table 6 – Dry heat test, storage temperature . 26
Table 7 – Cold test, storage temperature . 27
Table 8 – Change of temperature test . 27
Table 9 – Damp heat steady state test . 28
Table 10 – Cyclic temperature with humidity test . 28
Table 11 – Test reference conditions . 30
Table 12 – Test overview . 31
Table B.1 – Operating locations . 40
Table B.2 – Climatic conditions . 41
Table B.3 – Mechanical conditions . 41
Table B.4 – EMC conditions . 42
Table B.5 – Chemically active substance conditions . 42
Table B.6 – Mechanically active substance conditions . 42
Table B.7 – Biological conditions . 43

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IEC 60255-1:2022 © IEC 2022 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

MEASURING RELAYS AND PROTECTION EQUIPMENT –

Part 1: Common requirements

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60255-1 has been prepared by IEC technical committee 95: Measuring relays and
protection equipment. It is an International Standard.
This second edition cancels and replaces the first edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) scope of document clarified;
b) merging units and communications as an integral part of the protection added;
c) binary output clarification expanded;
d) environmental operating conditions added (Annex B);
e) test reference conditions added;
f) multiple changes to improve understanding across most clauses;
g) derating by manufacturer added;

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– 6 – IEC 60255-1:2022 © IEC 2022
h) safety and EMC tests removed from document and referenced only;
i) relay setting and type test guidelines modified (Annex A)
j) battery monitor port and low power instrument transformers added.
The text of this International Standard is based on the following documents:
Draft Report on voting
95/513/FDIS 95/521/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 60255 series, published under the general title Measuring relays
and protection equipment, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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IEC 60255-1:2022 © IEC 2022 – 7 –
INTRODUCTION
The following explains the numbering of documents falling under the responsibility of TC 95:
The numbering of documents follows the following principle:
• common standards start with IEC 60255–XX;
• protection functional standards fall into IEC the 60255-1XX series.
The IEC 60255 series consists of the following parts:
a) Common standards:
Part 1: Common requirements
Part 21: Vibration, shock, bump and seismic tests
Part 24: Common format for transient data exchange (COMTRADE) for power systems
Part 26: Electromagnetic compatibility requirements
Part 27: Product safety requirements
b) Protection functional standards:
Part 1XX: Functional requirements
NOTE The last two digits of the part of the proposed functional standard new numbering correspond to function
TM 1
numbers as established in IEEE Std C37.2 -2008 [3] .


___________
1
 Numbers in square brackets refer to the Bibliography.

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– 8 – IEC 60255-1:2022 © IEC 2022
MEASURING RELAYS AND PROTECTION EQUIPMENT –

Part 1: Common requirements



1 Scope
This part of IEC 60255 specifies common rules and requirements applicable to measuring relays
and protection equipment, including any combination of equipment to form a distributed
protection scheme for power system protection such as control, monitoring and process
interface equipment, to obtain uniformity of requirements and tests. This document covers the
main technologies in use today; other emerging technologies present specific EMC and safety
issues but the philosophy in this document will be applied.
All measuring relays and protection equipment used for protection within the power system
environment are covered by this document. Other documents in this series can define their own
requirements which in such cases take precedence. The typical locations for measuring relays
and protection equipment are where protection of electrical equipment is required: generally
power stations, substations and industrial locations.
Measuring relays and protection equipment installed in special applications (marine, railways,
aerospace, explosive atmospheres, computer centres, etc.) could be enhanced by additional
requirements required by that application.
2 Normative references
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.
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC 60255-21-1, Electrical relays – Part 21: Vibration, shock, bump and seismic tests on
measuring relays and protection equipment – Section One: Vibration tests (sinusoidal)
IEC 60255-21-2, Electrical relays – Part 21: Vibration, shock, bump and seismic tests on
measuring relays and protection equipment – Section Two: Shock and bump tests
IEC 60255-21-3, Electrical relays – Part 21: Vibration, shock, bump and seismic tests on
measuring relays and protection equipment – Section 3: Seismic tests
IEC 60255-26, Measuring relays and protection equipment – Part 26: Electromagnetic
compatibility requirements

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IEC 60255-1:2022 © IEC 2022 – 9 –
IEC 60255-27, Measuring relays and protection equipment – Part 27: Product safety
requirements
IEC 60255-1XX (all parts), Measuring relays and protection equipment – Part 1XX: Functional
requirements
IEC 60688, Electrical measuring transducers for converting AC and DC electrical quantities to
analogue or digital signals
IEC 61810-1, Electromechanical elementary relays
...