SIST EN IEC 61557-5:2022

Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 5: Resistance to earth (IEC 61557-5:2019)

This part of IEC 61557 specifies the requirements applicable to measuring equipment for measuring the resistance to earth using an AC voltage.

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 5: Erdungwiderstand (IEC 61557-5:2019)

Sécurité électrique dans les réseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de protection - Partie 5: Résistance à la terre (IEC 61557-5:2019)

IEC 61557-5:2019 est disponible sous forme de IEC 61557-5:2019 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 61557-5:2019 spécifie les exigences applicables aux appareils de mesure destinés à mesurer la résistance à la terre en utilisant une tension alternative. L'IEC 61557-5:2019 annule et remplace la deuxième édition parue en 2007. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) modification des définitions et symboles de l'Article 3;
b) réorganisation des paragraphes de l'Article 4 et alignement sur les autres parties de la série;
c) suppression des limites de tensions réduites de 25 V (valeur efficace) ou de 35 V (valeur de crête) en 4.5;
d) ajout d'exigences relatives aux pinces;
e) ajout du marquage relatif aux tensions assignées à la terre et à la catégorie de mesure à l'Article 5;
f) ajout d'un avertissement relatif à l'absence de tension dangereuse à l'Article 5;
g) remplacement du terme "incertitude de fonctionnement en pourcentage" par "incertitude de fonctionnement" à l'Article 6;
h) correction de l'équation relative à l'incertitude dans le Tableau 1;
i) ajout de l'Annexe A relative aux mesures d'essai avec des pinces de boucle.

Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti do 1 kV in enosmerne napetosti do 1,5 kV - Oprema za preskušanje, merjenje ali nadzorovanje zaščitnih ukrepov - 5. del: Ozemljitvena upornost (IEC 61557-5:2019)

Ta del standarda IEC 61557 določa zahteve, ki veljajo za opremo za merjenje upornosti ozemljitve z uporabo izmenične napetosti.

General Information

• Status: Published
• Public Enquiry End Date: 29-Apr-2018
• Publication Date: 01-Feb-2022
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 29.080.01 - Electrical insulation in general
• ICS: 29.240.01 - Power transmission and distribution networks in general
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-Dec-2021
• Due Date: 03-Mar-2022
• Completion Date: 02-Feb-2022
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Ref Project: EN IEC 61557-5:2021 - Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 5: Resistance to earth

Relations

• Replaces: SIST EN 61557-5:2007 - Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures -- Part 5: Resistance to earth
• Effective Date: 28-Dec-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61557-5:2022
01-marec-2022
Nadomešča:
SIST EN 61557-5:2007
Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti
do 1 kV in enosmerne napetosti do 1,5 kV - Oprema za preskušanje, merjenje ali
nadzorovanje zaščitnih ukrepov - 5. del: Ozemljitvena upornost (IEC 61557-5:2019)
Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC -
Equipment for testing, measuring or monitoring of protective measures - Part 5:
Resistance to earth (IEC 61557-5:2019)
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 5:
Erdungwiderstand (IEC 61557-5:2019)
Sécurité électrique dans les réseaux de distribution basse tension de 1 000 V c.a. et 1
500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de
protection - Partie 5: Résistance à la terre (IEC 61557-5:2019)
Ta slovenski standard je istoveten z: EN IEC 61557-5:2021
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
29.080.01 Električna izolacija na Electrical insulation in
splošno general
29.240.01 Omrežja za prenos in Power transmission and
distribucijo električne energije distribution networks in
na splošno general
SIST EN IEC 61557-5:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61557-5:2022

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SIST EN IEC 61557-5:2022


EUROPEAN STANDARD EN IEC 61557-5

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2021
ICS 17.220.20; 29.080.01; 29.240.01 Supersedes EN 61557-5:2007 and all of its amendments
and corrigenda (if any)
English Version
Electrical safety in low voltage distribution systems up to 1 000 V
AC and 1 500 V DC - Equipment for testing, measuring or
monitoring of protective measures - Part 5: Resistance to earth
(IEC 61557-5:2019)
Sécurité électrique dans les réseaux de distribution basse Elektrische Sicherheit in Niederspannungsnetzen bis AC 1
tension au plus égale à 1 000 V c.a. et 1 500 V c.c. - 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder
Dispositifs de contrôle, de mesure ou de surveillance de Überwachen von Schutzmaßnahmen - Teil 5:
mesures de protection - Partie 5: Résistance à la terre Erdungwiderstand
(IEC 61557-5:2019) (IEC 61557-5:2019)
This European Standard was approved by CENELEC on 2021-11-10. 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,
Turkey 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61557-5:2021 E

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SIST EN IEC 61557-5:2022
EN IEC 61557-5:2021 (E)
European foreword
The text of document 85/685/FDIS, future edition 3 of IEC 61557-5, prepared by IEC/TC 85
"Measuring equipment for electrical and electromagnetic quantities" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 61557-5:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-08-10
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-11-10
document have to be withdrawn
This document supersedes EN 61557-5:2007 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.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association.
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 61557-5:2019 was approved by CENELEC as a European
Standard without any modification.
2

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SIST EN IEC 61557-5:2022
EN IEC 61557-5:2021 (E)
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60364-6 2016 Low voltage electrical installations - Part 6: HD 60364-6 2016
Verification
- -  + A11 2017
- -  + A12 2017
IEC 61010-1 2010 Safety requirements for electrical EN 61010-1 2010
equipment for measurement, control, and
laboratory use - Part 1: General
requirements
+ A1 (mod) 2016  + A1 2019
IEC 61010-2-030 2017 Safety requirements for electrical EN IEC 61010-2-030 2021
equipment for measurement, control, and
laboratory use - Part 2-030: Particular
requirements for equipment having testing
or measuring circuits
- -  + A11 2021
IEC 61010-2-032 -  Safety requirements for electrical EN IEC 61010-2-032 -
equipment for measurement, control and
laboratory use - Part 2-032: Particular
requirements for hand-held and hand-
manipulated current sensors for electrical
test and measurement
IEC 61243-3 -  Live working - Voltage detectors - Part 3: EN 61243-3 -
Two-pole low-voltage type
IEC 61557-1 2019 Electrical safety in low voltage distribution EN IEC 61557-1 2021
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part 1:
General requirements

3

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SIST EN IEC 61557-5:2022

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SIST EN IEC 61557-5:2022



IEC 61557-5

®


Edition 3.0 2019-07




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Electrical safety in low voltage distribution systems up to 1 000 V a.c. and

1 500 V d.c. – Equipment for testing, measuring or monitoring of protective

measures –


Part 5: Resistance to earth



Sécurité électrique dans les réseaux de distribution basse tension au plus égale


à 1 000 V c.a. et 1 500 V c.c. – Dispositifs de contrôle, de mesure ou de

surveillance de mesures de protection –

Partie 5: Résistance à la terre










INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 17.220.20; 29.080.01; 29.240.01 ISBN 978-2-8322-7159-9




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

---------------------- Page: 7 ----------------------
SIST EN IEC 61557-5:2022
– 2 – IEC 61557-5:2019 © IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 7
4.1 General . 7
4.2 Output voltage . 7
4.3 Disturbance voltage . 7
4.4 Permissible resistance of probe and auxiliary earth electrode . 7
4.5 Electrical safety . 7
4.6 Clamps intended to measure earth loop resistances according to
IEC 60364-6:2016, Annex C, Clause C.3 . 8
5 Marking and operating instructions . 8
5.1 Marking . 8
5.2 Operating instructions . 8
6 Tests . 8
6.1 General . 8
6.2 Operating uncertainty . 9
6.3 Electrical safety . 10
Annex A (informative) Recommended test configuration for earth loop clamps . 11
A.1 General . 11
A.2 Test purpose . 11
A.3 Test result. 11
Bibliography . 12

Table 1 – Calculation of operating uncertainty . 9

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SIST EN IEC 61557-5:2022
IEC 61557-5:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS
UP TO 1 000 V AC AND 1 500 V DC –
EQUIPMENT FOR TESTING, MEASURING OR MONITORING
OF PROTECTIVE MEASURES –

Part 5: Resistance to earth

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 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 certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
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.
International Standard IEC 61557-5 has been prepared by IEC technical committee 85:
Measuring equipment for electrical and electromagnetic quantities.
This third edition cancels and replaces the second edition published in 2007. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previ
...

SLOVENSKI STANDARD
oSIST prEN 61557-5:2018
01-april-2018
(OHNWULþQDYDUQRVWYQL]NRQDSHWRVWQLKUD]GHOLOQLKVLVWHPLKL]PHQLþQHQDSHWRVWLGR
N9LQHQRVPHUQHQDSHWRVWLGRN92SUHPD]DSUHVNXãDQMHPHUMHQMHDOL
QDG]RURYDQMH]DãþLWQLKXNUHSRYGHO2]HPOMLWYHQDXSRUQRVW
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or monitoring of protective measures - Part 5:
Resistance to earth
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 5:
Erdungwiderstand
Sécurité électrique dans les réseaux de distribution basse tension de 1 000 V c.a. et 1
500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de
protection - Partie 5: Résistance à la terre
Ta slovenski standard je istoveten z: prEN 61557-5:2018
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
29.080.01 (OHNWULþQDL]RODFLMDQD Electrical insulation in
VSORãQR general
29.240.01 2PUHåMD]DSUHQRVLQ Power transmission and
GLVWULEXFLMRHOHNWULþQHHQHUJLMH distribution networks in
QDVSORãQR general
oSIST prEN 61557-5:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 61557-5:2018

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oSIST prEN 61557-5:2018
85/633/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61557-5 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2018-02-09 2018-05-04
SUPERSEDES DOCUMENTS:
85/611/CD,85/625/CC

IEC TC 85 : MEASURING EQUIPMENT FOR ELECTRICAL AND ELECTROMAGNETIC QUANTITIES
SECRETARIAT: SECRETARY:
China Mr Bo Chen
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 64
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:

EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or monitoring of protective measures - Part 5: Resistance to
earth

PROPOSED STABILITY DATE: 2025

NOTE FROM TC/SC OFFICERS:


Copyright © 2017 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

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oSIST prEN 61557-5:2018
- 2 - 85/633/CDV
CONTENTS
1
2 FOREWORD . - 3 -
3 1 Scope . - 5 -
4 2 Normative references . - 5 -
5 3 Terms, definitions and symbols . - 5 -
6 4 Requirements . - 6 -
7 4.1 General . - 6 -
8 4.2 Output voltage . - 6 -
9 4.3 Disturbance voltage . - 6 -
10 4.4 Permissible resistance of probe and auxiliary earth electrode . - 6 -
11 4.5 Electrical safety . - 7 -
12 4.6 Clamps intended to measure earth loop resistances according to IEC 60364-
13 6, Annex C, C.3 . - 7 -
14 5 Marking and operating instructions . - 7 -
15 5.1 Marking . - 7 -
16 5.2 Operating instructions . - 7 -
17 6 Tests . - 8 -
18 6.1 General . - 8 -
19 6.2 Operating uncertainty. - 8 -
20 6.3 Electrical safety . - 9 -
21 Annex A (informative) Recommended test configuration for earth loop clamps . - 10 -
22 A.1 Scope . - 10 -
23 A.2 Test purpose . - 10 -
24 A.3 Test arrangement. - 10 -
25 A.4 Test result . - 10 -
26
27 Table 1 – Calculation of operating uncertainty . - 8 -
28
29

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oSIST prEN 61557-5:2018
- 3 - 85/633/CDV
30 INTERNATIONAL ELECTROTECHNICAL COMMISSION
31 ____________
32
33 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS
34 UP TO 1 000 V AC AND 1 500 V DC –
35 EQUIPMENT FOR TESTING, MEASURING OR MONITORING
36 OF PROTECTIVE MEASURES –
37
38 Part 5: Resistance to earth
39
40 FOREWORD
41 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
42 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
43 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
44 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
45 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
46 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
47 in the subject dealt with may participate in this preparatory work. International, governmental and non-
48 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
49 with the International Organization for Standardization (ISO) in accordance with conditions determined by
50 agreement between the two organizations.
51 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
52 consensus of opinion on the relevant subjects since each technical committee has representation from all
53 interested IEC National Committees.
54 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
55 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
56 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
57 misinterpretation by any end user.
58 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
59 transparently to the maximum extent possible in their national and regional publications. Any divergence
60 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
61 the latter.
62 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
63 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
64 services carried out by independent certification bodies.
65 6) All users should ensure that they have the latest edition of this publication.
66 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
67 members of its technical committees and IEC National Committees for any personal injury, property damage or
68 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
69 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
70 Publications.
71 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
72 indispensable for the correct application of this publication.
73 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
74 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
75 International Standard IEC 61557-5 has been prepared by working group 8: Measuring and
76 monitoring equipment for testing protective devices in energy distribution systems, of IEC
77 technical committee 85: Measuring equipment for electrical and electromagnetic quantities
78 This third edition cancels and replaces the second edition published in 2007. This edition
79 constitutes a minor revision.
80 This edition includes the following significant technical changes with respect to the previous
81 edition:
82 a) Definitions and symbols modified in Clause 3
83 b) Subclauses in Clause 4 restructured and aligned with other parts of the series
84 c) Limits for reduced voltages 25V r.m.s or 35 V peak removed in Clause 4.5
85 d) Requirements for clamps added

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oSIST prEN 61557-5:2018
- 4 - 85/633/CDV
86 e) Marking for rated voltages to earth and measurement category added in Clause 5
87 f) Warning about absence of hazardous voltage added in Clause 5
88 g) Percentage operating uncertainty renamed to operating uncertainty in Clause 6
89 h) Equation for uncertainty corrected in Table 1
90 i) New Annex A on test measurements with loop clamps added.
91
92 The text of this International Standard is based on the following documents:
FDIS Report on voting
xxx xxx
93
94 Full information on the voting for the approval of this International Standard can be found in
95 the report on voting indicated in the above table.
96 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
97 This part of IEC 61557 shall be used in conjunction with Part 1.
98 A list of all parts of the IEC 61557 series, published under the general title Electrical safety in
99 low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing,
100 measuring or monitoring of protective measures, can be found on the IEC website
101 The committee has decided that the contents of this document will remain unchanged until the
102 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
103 the specific document. At this date, the document will be
104 • reconfirmed,
105 • withdrawn,
106 • replaced by a revised edition, or
107 • amended.
108
109 The National Committees are requested to note that for this document the stability date
110 is 2025.
111 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE
112 DELETED AT THE PUBLICATION STAGE.

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