SIST EN IEC 61557-14:2025

SLOVENSKI STANDARD
01-marec-2025
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 - 14. del: Oprema za preskušanje varnosti
električne opreme strojev (IEC 61557-14:2023)
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 14:
Equipment for testing the safety of electrical equipment of machinery (IEC 61557-
14:2023)
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V –
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen – Teil 14: Geräte
zum Prüfen der Sicherheit der elektrischen Ausrüstung von Maschinen (IEC 61557-
14:2023)
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 14: Dispositifs de contrôle de la sécurité des appareils électriques sur
machines (IEC 61557-14:2023)
Ta slovenski standard je istoveten z: EN IEC 61557-14:2024
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61557-14

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2024
ICS 17.220.20; 29.080.01; 29.240.01 Supersedes EN 61557-14:2013
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 14: Equipment for
testing the safety of electrical equipment of machinery
(IEC 61557-14:2023)
Sécurité électrique dans les réseaux de distribution basse Elektrische Sicherheit in Niederspannungsnetzen bis AC 1
tension jusqu'à 1 000 V en courant alternatif et 1 500 V en 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder
courant continu - Dispositifs de contrôle, de mesure ou de Überwachen von Schutzmaßnahmen - Teil 14: Geräte zum
surveillance de mesures de protection - Partie 14: Prüfen der Sicherheit der elektrischen Ausrüstung von
Dispositifs de contrôle de la sécurité des appareils Maschinen
électriques sur machines (IEC 61557-14:2023)
(IEC 61557-14:2023)
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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61557-14:2024 E

European foreword
The text of document 85/875/FDIS, future edition 2 of IEC 61557-14, prepared by TC 85 "Measuring
equipment for electrical and electromagnetic quantities" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN IEC 61557-14:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-12-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-12-31
document have to be withdrawn
This document supersedes EN 61557-14:2013 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.
This document is read in conjunction with EN IEC 61557-1:2021.
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 61557-14:2023 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61000-4-8 NOTE Approved as EN 61000-4-8
IEC 61800-5-2 NOTE Approved as EN 61800-5-2
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 60204-1 - Safety of machinery - Electrical equipment EN 60204-1 -
of machines - Part 1: General requirements
IEC 60529 - Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 61010-031 - Safety requirements for electrical EN IEC 61010-031 -
equipment for measurement, control, and
laboratory use - Part 031: Safety
requirements for hand-held and hand-
manipulated probe assemblies for
electrical test and measurement
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 - Safety requirements for electrical EN IEC 61010-2- -
equipment for measurement, control, and 030
laboratory use - Part 2-030: Particular
requirements for equipment having testing
or measuring circuits
IEC 61010-2-034 - Safety requirements for electrical - EN IEC 61010-2- -
equipment for measurement, control, and 034
laboratory use - Part 2-034: Particular
requirements for measurement equipment
for insulation resistance and test
equipment for electric strength
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
Publication Year Title EN/HD Year
IEC 61557-2 - Electrical safety in low voltage distribution EN IEC 61557-2 -
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part 2:
Insulation resistance
IEC 61557-3 - Electrical safety in low voltage distribution EN IEC 61557-3 -
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part 3:
Loop impedance
IEC 61557-4 - Electrical safety in low voltage distribution EN IEC 61557-4 -
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part 4:
Resistance of earth connection and
equipotential bonding
IEC 61557-6 - Electrical safety in low voltage distribution EN IEC 61557-6 -
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part 6:
Effectiveness of residual current devices
(RCD) in TT, TN and IT systems
IEC 61557-10 - Electrical safety in low voltage distribution EN IEC 61557-10 -
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part
10: Combined measuring equipment
IEC 61557-13 - Electrical safety in low voltage distribution EN IEC 61557-13 -
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part
13: Hand-held and hand-manipulated
current clamps and sensors for
measurement of leakage currents in
electrical distribution systems
IEC 61557-16 - Electrical safety in low voltage distribution EN IEC 61557-16 -
systems up to 1 000 V AC and 1 500 V DC
- Equipment for testing, measuring or
monitoring of protective measures - Part
16: Equipment for testing the effectiveness
of the protective measures of electrical
equipment and/or medical electrical
equipment
IEC 61557-14 ®
Edition 2.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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 14: Equipment for testing the safety of electrical equipment of machinery

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

à 1 000 V en courant alternatif et 1 500 V en courant continu – Dispositifs de

contrôle, de mesure ou de surveillance de mesures de protection –

Partie 14: Dispositifs de contrôle de la sécurité des appareils électriques sur

machines
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20, 29.080.01, 29.240.01 ISBN 978-2-8322-7250-3

– 2 – IEC 61557-14:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Requirements . 7
4.1 General requirements . 7
4.2 Measuring functions . 7
4.2.1 Required measuring functions . 7
4.2.2 Measurement of resistance of protective bonding . 8
4.2.3 Measurement of fault loop impedance. 8
4.2.4 Measurement of insulation resistance . 8
4.2.5 Testing of the effectiveness of protective measures with RCD . 8
4.2.6 Voltage tests . 8
4.2.7 Measurement of residual voltage . 9
4.2.8 Measurement of leakage current . 9
4.3 Construction requirements for testing equipment . 9
4.3.1 Overload capability . 9
4.3.2 Sockets for service purposes . 10
4.3.3 Degree of protection . 10
4.3.4 Overvoltage and measurement categories . 10
4.4 Accessories . 10
5 Markings and operating instructions . 10
5.1 Markings . 10
5.2 Operating instructions . 11
6 Tests . 11
6.1 General . 11
6.2 Operating uncertainty . 11
6.3 Tests of measuring equipment according to measuring functions . 12
6.4 Test of construction requirements of test equipment . 12
Bibliography . 16

Table 1 – Test voltages . 8
Table 2 – Calculation of operating uncertainty . 13
Table 3 – Compliance tests of measuring equipment according to measuring function . 14
Table 4 – Test of construction requirements of test equipment . 15

IEC 61557-14:2023 © IEC 2023 – 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 14: Equipment for testing the safety of electrical
equipment of machinery
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.
IEC 61557-14 has been prepared by IEC technical committee 85: Measuring equipment for
electrical and electromagnetic quantities. It is an International Standard.
This second edition cancels and replaces the first edition published in 2013. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarifying the introduction;
b) replaced "dielectric strength" by "voltage test";
c) requirement for maximum output current has been added in 4.2.6.1;
d) tripping time at electrical switching activated by two-hand operation has been added in
4.2.6.1;
– 4 – IEC 61557-14:2023 © IEC 2023
e) additional time limiting capability for the protection against electric shock for test persons
and bystanders in 4.2.6.2;
f) updated references for safety testing;
g) alignment of the structure with that of the whole IEC 61557 series.
The text of this International Standard is based on the following documents:
Draft Report on voting
85/875/FDIS 85/884/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.
This International Standard is to be used in conjunction with IEC 61557-1:2019.
A list of all parts in the IEC 61557 series, published under the general title 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, 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.
IEC 61557-14:2023 © IEC 2023 – 5 –
INTRODUCTION
This document defines particular requirements for test and measurement equipment used to
determine the electrical safety of electrical equipment of machinery. The IEC 61010 series,
other parts of the IEC 61557 series and the IEC 60204 series do not cover all safety aspects of
equipment used for testing electrical equipment of machinery in accordance with the test
sequence of IEC 60204‑1.
This document provides additional measures to reduce the risk of electric shock for the test
persons and bystanders during voltage tests in the field. This document also defines
performance requirements for each test and measurement function to ensure reliable and
comparable results.
– 6 – IEC 61557-14:2023 © IEC 2023
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 14: Equipment for testing the safety of electrical
equipment of machinery
1 Scope
This part of IEC 61557 defines special requirements fo
...