FprEN IEC 61557-14:2023

SLOVENSKI STANDARD
oSIST prEN IEC 61557-14:2022
01-julij-2022
Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti
do 1 000 kV in enosmerne napetosti do 1 500 kV - Oprema za preskušanje,
merjenje ali nadzorovanje zaščitnih ukrepov - 14. del: Oprema za preskušanje
varnosti električne opreme strojev
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 14:
Equipment for testing the safety of electrical equipment for machinery
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
Ta slovenski standard je istoveten z: prEN IEC 61557-14:2022
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
oSIST prEN IEC 61557-14:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61557-14:2022
oSIST prEN IEC 61557-14:2022
85/830/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61557-14 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-06-03 2022-08-26
SUPERSEDES DOCUMENTS:
85/779/CD, 85/801A/CC
IEC TC 85 : MEASURING EQUIPMENT FOR ELECTRICAL AND ELECTROMAGNETIC QUANTITIES
SECRETARIAT: SECRETARY:
China Ms Guiju HAN
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 44,TC 66
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 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

PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
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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1 CONTENTS
3 FOREWORD . 3
4 INTRODUCTION . 5
5 1 Scope . 6
6 2 Normative references . 6
7 3 Terms and definitions . 7
8 4 Requirements . 7
9 4.1 General requirements . 7
10 4.2 Measuring functions . 7
11 4.2.1 Required measuring functions . 7
12 4.2.2 Measurement of resistance of protective bonding . 7
13 4.2.3 Measurement of fault loop impedance . 7
14 4.2.4 Measurement of insulation resistance . 8
15 4.2.5 Testing of the effectiveness of protective measures with RCD . 8
16 4.2.6 Voltage tests . 8
17 4.2.7 Measurement of residual voltage . 9
18 4.2.8 Measurement of leakage current . 9
19 4.3 Construction requirements for testing equipment . 9
20 4.3.1 Overload capability . 9
21 4.3.2 Sockets for service purposes . 9
22 4.3.3 Degree of protection . 10
23 4.3.4 Overvoltage and measurement categories . 10
24 4.4 Accessories . 10
25 5 Markings and operating instructions . 10
26 5.1 Markings . 10
27 5.2 Operating instructions . 10
28 6 Tests . 11
29 6.1 General . 11
30 6.2 Operating uncertainty. 11
31 6.3 Tests of measuring equipment according to measuring functions . 12
32 6.4 Test of construction requirements of test equipment . 12
33 Bibliography . 16
35 Table 1 – Test voltages. 8
36 Table 2 – Calculation of operating uncertainty . 12
37 Table 3 – Compliance tests of measuring equipment according to measuring function . 14
38 Table 4 – Test of construction requirements of test equipment . 14
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42 INTERNATIONAL ELECTROTECHNICAL COMMISSION
43 ____________
45 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO
46 1 000 V AC AND 1 500 V DC - EQUIPMENT FOR TESTING, MEASURING OR
47 MONITORING OF PROTECTIVE MEASURES
49 Part 14: Equipment for testing the safety of electrical equipment of
50 machinery
53 FOREWORD
54 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
55 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
56 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
57 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
58 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
59 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
60 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
61 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
62 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
63 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
64 consensus of opinion on the relevant subjects since each technical committee has representation from all
65 interested IEC National Committees.
66 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
67 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
68 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
69 misinterpretation by any end user.
70 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
71 transparently to the maximum extent possible in their national and regional publications. Any divergence between
72 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
73 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
74 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
75 services carried out by independent certification bodies.
76 6) All users should ensure that they have the latest edition of this publication.
77 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
78 members of its technical committees and IEC National Committees for any personal injury, property damage or
79 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
80 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
81 Publications.
82 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
83 indispensable for the correct application of this publication.
84 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
85 rights. IEC shall not be held responsible for identifying any or all such patent rights.
86 International Standard IEC 1557-14 has been prepared by WG8: Measuring and monitoring
87 equipment for testing protective devices in energy distribution systems, of IEC technical
88 committee TC85: Measuring equipment for electrical and electromagnetic quantities.
89 This second edition cancels and replaces the first edition published in 2013. This edition
90 constitutes a technical revision.
91 This edition includes the following significant technical changes with respect to the previous
92 edition:
93 a) Clarifying the introduction;
94 a) Replaced ‘dielectric strength’ by ‘voltage test’;
95 b) Requirement for maximum output current has been added in 4.2.6.1

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96 c) Tripping time at electrical switching activated by two-hand operation has been added in
97 4.2.6.1
98 d) Additional time limiting capability for the protection against electric shock for test persons
99 and bystanders in 4.2.6.2
100 e) Updated references for safety testing;
101 f) Alignment of the structure with that of the whole IEC 61557 series.
102 The text of this International Standard is based on the following documents:
FDIS Report on voting
XX/XX/FDIS XX/XX/RVD
104 Full information on the voting for the approval of this International Standard can be found in the
105 report on voting indicated in the above table.
106 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
107 This International Standard is to be used in conjunction with IEC 61557-1:2019
108 A list of all parts in the IEC 61557 series, published under the general title ELECTRICAL
109 SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO 1 000 V AC AND 1 500 V DC –
110 EQUIPMENT FOR TESTING, MEASURING OR MONITORING OF PROTECTIVE MEASURES,
111 can be found on the IEC website
112 The committee has decided that the contents of this document will remain unchanged until the
113 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
114 the specific document. At this date, the document will be
115 • reconfirmed,
116 • withdrawn,
117 • replaced by a revised edition, or
118 • amended.
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120 INTRODUCTION
121 This standard defines particular requirements for test and measurement equipment used to
122 determine the electrical safety of electrical equipment of machinery. IEC 61010, other parts of
123 the IEC 61557 series and IEC 60204 do not cover all safety aspects of equipment used for
124 testing electrical equipment of machinery in accordance with the test sequence of IEC 60204-1.
125 This part of IEC 61557 provides additional measures to reduce the risk of electric shock for the
126 test persons and bystanders during voltage tests in the field. The standard also defines
127 performance requirements for each test and measurement function to ensure reliable and
128 comparable results.
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