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 6: Effectiveness of residual current devices (RCD) in TT, TN and IT systems (IEC 61557-6:2019)

This part of IEC 61557 specifies the requirements applicable to measuring equipment for
testing the effectiveness of protective measures of residual current devices (RCD) installed in
TT, TN and IT systems.
It is not the purpose of this document to verify the RCD according to their product standards.
NOTE Applicable tripping tests for time and current of RCD are listed in Annex A, Table A.1

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 6: Wirksamkeit von Fehlerstrom-Schutzeinrichtungen (RCD) in TT-, TN- und IT-Systemen (IEC 61557-6:2019)

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 6: Efficacité des dispositifs à courant résiduel (DCR) dans les réseaux TT, TN et IT (IEC 61557-6:2019)

IEC 61557-6:2019 est disponible sous forme de IEC 61557-6:2019 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 61557-6:2019 spécifie les exigences applicables aux appareils de mesure destinés à soumettre à essai l'efficacité des mesures de protection des dispositifs à courant différentiel résiduel (DDR) installés dans les réseaux TT, TN et IT. La présente norme n'a pas pour objet de vérifier la conformité des DDR aux normes de produits associées. L'IEC 61557-6:2019 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) ajout d'exigences pour les essais d'un nouveau type de DDR; b) ajout des exigences pour les DDR de type B (ancienne Annexe B); c) ajout de l'Annexe B relative aux temps de déclenchement recommandés; d) alignement de la structure sur l'ensemble de la série IEC 61557.

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 - 6. del: Učinkovitost naprav na preostali tok (RCD) v sistemih TT, TN in IT (IEC 61557-6:2019)

Ta del standarda IEC 61557 določa zahteve, ki veljajo za merilno opremo za preskušanje učinkovitosti zaščitnih ukrepov pri napravah na diferenčni tok (RCD), nameščenih v sistemih TT, TN in IT. Namen tega dokumenta ni preverjanje naprav na diferenčni tok v skladu z njihovimi proizvodnimi standardi. OPOMBA: Veljavni preskusi izklopa za čas in tok naprav na diferenčni tok so navedeni v preglednici A.1 v dodatku A.

General Information

Status
Published
Public Enquiry End Date
29-Apr-2018
Publication Date
06-Apr-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-Dec-2021
Due Date
03-Mar-2022
Completion Date
07-Apr-2022

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SLOVENSKI STANDARD
SIST EN IEC 61557-6:2022
01-junij-2022
Nadomešča:
SIST EN 61557-6:2008

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 - 6. del: Učinkovitost naprav na preostali tok
(RCD) v sistemih TT, TN in IT (IEC 61557-6:2019)

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 6:

Effectiveness of residual current devices (RCD) in TT, TN and IT systems (IEC 61557-

6:2019)
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 6:

Wirksamkeit von Fehlerstrom-Schutzeinrichtungen (RCD) in TT-, TN- und IT-Systemen

(IEC 61557-6:2019)

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 6: Efficacité des dispositifs à courant résiduel (DCR) dans les réseaux

TT, TN et IT (IEC 61557-6:2019)
Ta slovenski standard je istoveten z: EN IEC 61557-6:2021
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
29.080.01 Električna izolacija na Electrical insulation in
splošno general
SIST EN IEC 61557-6:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61557-6:2022
---------------------- Page: 2 ----------------------
SIST EN IEC 61557-6:2022
EUROPEAN STANDARD EN IEC 61557-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021

ICS 17.220.20; 29.080.01; 29.240.01 Supersedes EN 61557-6:2007 and all of its amendments

and corrigenda (if any)
English Version
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 6: Effectiveness of
residual current devices (RCD) in TT, TN and IT systems
(IEC 61557-6:2019)

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 6: Wirksamkeit

mesures de protection - Partie 6: Efficacité des dispositifs à von Fehlerstrom-Schutzeinrichtungen (RCD) in TT-, TN-

courant différentiel résiduel (DDR) dans les réseaux TT, TN und IT-Systemen
et IT (IEC 61557-6:2019)
(IEC 61557-6:2019)

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 61557-6:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61557-6:2022
EN IEC 61557-6:2021 (E)
European foreword

The text of document 85/684/FDIS, future edition 3 of IEC 61557-6, 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 61557-6:2021.
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 61557-6:2007 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 61557-6:2019 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 standards

indicated:
IEC 60359:2001 NOTE Harmonized as EN 60359:2002 (not modified)
IEC 60364-4-41 NOTE Harmonized as HD 60364-4-41
IEC 61008-1 NOTE Harmonized as EN 61008-1
IEC 61009-1 NOTE Harmonized as EN 61009-1
---------------------- Page: 4 ----------------------
SIST EN IEC 61557-6:2022
EN IEC 61557-6:2021 (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 61010-1 2010 Safety requirements for electrical equipment EN 61010-1 2010
for measurement, control, and laboratory use
- Part 1: General requirements
+ A1 (mod) 2016 + A1 2019

IEC 61010-2-030 2017 Safety requirements for electrical equipment EN IEC 61010-2-030 2021

for measurement, control, and laboratory use
- Part 2-030: Particular requirements for
equipment having testing or measuring
circuits
- - + A11 2021
IEC 61010-031 - Safety requirements for electrical equipment EN 61010-031 -
for measurement, control and laboratory use
- Part 031: Safety requirements for hand-held
probe assemblies for electrical measurement
and test

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
---------------------- Page: 5 ----------------------
SIST EN IEC 61557-6:2022
---------------------- Page: 6 ----------------------
SIST EN IEC 61557-6:2022
IEC 61557-6
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 6: Effectiveness of residual current devices (RCD) in TT, TN and IT systems
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 6: Efficacité des dispositifs à courant différentiel résiduel (DDR)
dans les réseaux TT, TN et IT
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 29.080.01; 29.240.01 ISBN 978-2-8322-7160-5

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 61557-6:2022
– 2 – IEC 61557-6:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 Requirements .................................................................................................................. 6

4.1 General ................................................................................................................... 6

4.2 Functions ................................................................................................................ 7

4.2.1 Measurement of trip current ............................................................................. 7

4.2.2 Non-tripping functions ...................................................................................... 7

4.2.3 Fault voltage indication .................................................................................... 8

4.2.4 Measurement of trip time ................................................................................. 8

4.3 Measurement with indicators ................................................................................... 8

4.4 Test with rated residual operating current ............................................................... 9

4.5 Fault voltages exceeding U ................................................................................... 9

4.6 Overvoltage ............................................................................................................ 9

5 Marking and operating instructions .................................................................................. 9

5.1 Marking ................................................................................................................... 9

5.2 Explicit indication of the waveform of the testing current ......................................... 9

5.3 Operating instructions ........................................................................................... 10

6 Tests ............................................................................................................................. 10

6.1 General ................................................................................................................. 10

6.2 Operating uncertainty ............................................................................................ 11

6.3 Fault voltage ......................................................................................................... 12

6.4 Testing the connection to voltages higher than nominal voltage ............................ 12

6.5 Overvoltage .......................................................................................................... 12

Annex A (informative) Applicable tripping tests (time and current) for different types

of RCDs ................................................................................................................................ 13

Bibliography .......................................................................................................................... 14

Table 1 – Calculation of operating uncertainty ...................................................................... 11

Table A.1 – Tripping tests for different types of RCD ............................................................ 13

---------------------- Page: 8 ----------------------
SIST EN IEC 61557-6:2022
IEC 61557-6:2019 © 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 6: Effectiveness of residual current devices (RCD)
in TT, TN and IT systems
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 61557-6 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 previous

edition:
a) addition of requirements for testing a new type of RCD;
b) addition of requirements for type B RCDs (former Annex B);
c) addition of new Annex B on recommended tripping times;
---------------------- Page: 9 ----------------------
SIST EN IEC 61557-6:2022
– 4 – IEC 61557-6:2019 © IEC 2019
d) alignment of the structure with that of the whole IEC 61557 series.
The text of this International Standard is based on the following documents:
FDIS Report on voting
85/ 684/FDIS 85/ 697/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

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 "http://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.
---------------------- Page: 10 ----------------------
SIST EN IEC 61557-6:2022
IEC 61557-6:2019 © IEC 2019 – 5 –
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 6: Effectiveness of residual current devices (RCD)
in TT, TN and IT systems
1 Scope

This part of IEC 61557 specifies the requirements applicable to measuring equipment for

testing the effectiveness of protective measures of residual current devices (RCD) installed in

TT, TN and IT systems.

It is not the purpose of this document to verify the RCD according to their product standards.

NOTE Applicable tripping tests for time and current of RCD are listed in Annex A, Table A.1.

2 Normative refe
...

SLOVENSKI STANDARD
oSIST prEN 61557-6:2018
01-april-2018

(OHNWULþQDYDUQRVWYQL]NRQDSHWRVWQLKUD]GHOLOQLKVLVWHPLK]DL]PHQLþQHQDSHWRVWL

GRN9LQHQRVPHUQHQDSHWRVWLGRN92SUHPD]DSUHVNXãDQMHPHUMHQMHDOL
QDG]RURYDQMH]DãþLWQLKXNUHSRYGHO8þLQNRYLWRVWQDSUDYQDSUHRVWDOL
UHVLGXDOQL WRNYVLVWHPLK7717LQ,7

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 6:
Effectiveness of residual current devices (RCD) in TT, TN and IT systems
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 6:

Wirksamkeit von Fehlerstrom-Schutzeinrichtungen (RCD) in TT-, TN- und IT-Systemen

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 6: Efficacité des dispositifs à courant résiduel (DCR) dans les réseaux

TT, TN et IT
Ta slovenski standard je istoveten z: prEN 61557-6:2018
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
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 61557-6:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 61557-6:2018
---------------------- Page: 2 ----------------------
oSIST prEN 61557-6:2018
85/634/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61557-6 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2018-02-09 2018-05-04
SUPERSEDES DOCUMENTS:
85/612A/CD,85/626/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 23,TC 44,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 6: Effectiveness of residual current

devices (RCD) in TT, TN and IT systems
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.
---------------------- Page: 3 ----------------------
oSIST prEN 61557-6:2018
- 2 - 85/634/CDV
1 CONTENTS

3 FOREWORD ...................................................................................................................... - 3 -

4 1 Scope ......................................................................................................................... - 5 -

5 2 Normative references .................................................................................................. - 5 -

6 3 Terms and definitions .................................................................................................. - 5 -

7 4 Requirements ............................................................................................................. - 6 -

8 4.1 General .............................................................................................................. - 6 -

9 4.2 Functions ........................................................................................................... - 6 -

10 4.2.1 Measurement of trip current ........................................................................ - 6 -

11 4.2.2 Non-tripping functions ................................................................................. - 7 -

12 4.2.3 Fault voltage indication ............................................................................... - 7 -

13 4.2.4 Measurement of trip time ............................................................................ - 8 -

14 4.3 Measurement with indicators .............................................................................. - 8 -

15 4.4 Test with rated residual operating current ........................................................... - 8 -

16 4.5 Fault voltages exceeding U .............................................................................. - 8 -

17 4.6 Overvoltage ........................................................................................................ - 8 -

18 5 Marking and operating instructions .............................................................................. - 9 -

19 5.1 Marking .............................................................................................................. - 9 -

20 5.2 Explicit indication of the waveform of the testing current .................................... - 9 -

21 5.3 Operating instructions ........................................................................................ - 9 -

22 6 Tests .......................................................................................................................... - 9 -

23 6.1 General .............................................................................................................. - 9 -

24 6.2 Operating uncertainty ....................................................................................... - 10 -

25 6.3 Fault voltage .................................................................................................... - 11 -

26 6.4 Testing the connection to voltages higher than nominal voltage ....................... - 11 -

27 6.5 Overvoltage ...................................................................................................... - 11 -

28 Annex A (informative) Applicable tripping tests (time and current) for different types of RCDs -

29 12 -

30 Bibliography ..................................................................................................................... - 13 -

---------------------- Page: 4 ----------------------
oSIST prEN 61557-6:2018
- 3 - 85/634/CDV
33 INTERNATIONAL ELECTROTECHNICAL COMMISSION
34 ____________
36 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO
37 1 000 V AC AND 1 500 V DC – EQUIPMENT FOR TESTING, MEASURING, OR
38 MONITORING OF PROTECTIVE MEASURES –

40 Part 6: Effectiveness of residual current operated protective devices (RCD) in TT,

41 TN and IT systems
43 FOREWORD

44 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all

45 national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-

46 operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to

47 other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available

48 Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical

49 committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work.

50 International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation.

51 IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions

52 determined by agreement between the two organizations.

53 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

54 consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC

55 National Committees.

56 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees

57 in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate,

58 IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.

59 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently

60 to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication

61 and the corresponding national or regional publication shall be clearly indicated in the latter.

62 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment

63 services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by

64 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 members of

67 its technical committees and IEC National Committees for any personal injury, property damage or other damage of any

68 nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the

69 publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

70 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

71 indispensable for the correct application of this publication.

72 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights.

73 IEC shall not be held responsible for identifying any or all such patent rights.

74 International Standard IEC 61557-6 has been prepared by IEC technical committee TC85: Measuring

75 equipment for electrical and electromagnetic quantities.

76 This third edition cancels and replaces the second edition published in 2007. This edition constitutes a

77 technical revision.

78 This edition includes the following significant technical changes with respect to the previous edition:

79 a) Requirements for testing new type of RCDs
80 b) Requirements for RCD type B (former Annex A)
81 c) New Annex B on recommended tripping times
82 d) Alignment of the structure to the whole series IEC61557
83 :
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84 The text of this standard is based on the following documents:
FDIS Report on voting
XX/XX/FDIS XX/XX/RVD

86 Full information on the voting for the approval of this standard can be found in the report on voting

87 indicated in the above table.

88 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

89 This part of IEC 61557 shall be used in conjunction with Part 1.

90 A list of all parts in the IEC 61557 series, published under the general title Electrical safety in low

91 voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or

92 monitoring of protective measure,’ can be found on the IEC website.

93 The committee has decided that the contents of this publication will remain unchanged until the

94 stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the

95 specific publication. At this date, the publication will be
96 • reconfirmed,
97 • withdrawn,
98 • replaced by a revised edition, or
99 • amended.
100

101 The National Committees are requested to note that for this publication the stability date is 2025.

102 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED AT THE

103 PUBLICATION STAGE.
104
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105 ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION
106 SYSTEMS UP TO 1000 V AC AND 1500 V DC –
107 EQUIPMENT FOR TESTING, MEASURING OR MONITORING
108 OF PROTECTIVE MEASURES –
109
110 Part 6: Effectiveness of residual current operated protective devices
111 (RCD) in TT, TN and IT systems
112
113 1 Scope

114 This part of IEC 61557 specifies the requirements for measuring equipment applied to the testing of

115 the effectiveness of protective measures of residual current operated protective devices (RCD)

116 installed in TT, TN and IT systems.

117 It is not the purpose of this standard to verify the RCDs according to their product standards.

118 2 Normative references

119 The following documents are referred to in the text in such a way that some or all of their content

120 constitutes requirements of this document. For dated references, only the edition cited applies. For

121 undated references, the latest edition of the referenced document (including any amendments) applies.

122 IEC 61010-1:2010, AMD1:2016, Safety requirements for electrical equipment for measurement,

123 control, and laboratory use – Part 1: General requirements

124 IEC 61010-2-030:2017, Safety requirements for electrical equipment for measurement, control, and

125 laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits

126 3 Terms and definitions

127 For the purposes of this document, the terms and definitions given in IEC 61557-1 and the following

128 terms and definitions apply.

129 ISO and IEC maintain terminological databases for use in standardization at the following addresses:

130 – IEC Electropedia: available at http://www.electropedia.org/
131 – ISO Online browsing platform: available at http://www.iso.org/obp
132 3.1
133 earth fault current
134 current flowing to earth due to an insulation fault
135 [SOURCE: IEV 442-01-23]
136 3.2
137 residual current
138 I

139 r.m.s. value of the vector sum of the currents flowing through the main circuit of the residual current

140 device
141 [SOURCE: IEV 442-05-19]
142 3.3
143 rated residual operating current
144 I
145 fault current for which the residual current protective device is designed
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146 3.4
147 residual operating current
148 I

149 value of residual current which causes the residual current device to operate under specified

150 conditions
151 [SOURCE: IEV 442-05-20]
152 3.5
153 leakage current

154 electric current in an unwanted conductive path to earth under normal operating conditions

155 [SOURCE: IEV 195-05-15, modified: ‘to earth’ is added]
156 3.6
157 test resistance
158 R
159 resistance by means of which a fault current for test purposes is produced
160 3.7
161 resistance to earth
162 resistance to ground (US)
163 real part of the impedance to earth
164 [SOURCE: IEV 195-01-18]
165
166 4 Requirements
167 4.1 General

168 In addition to the requirements of Clause 4 of IEC 61557-1, the requirements of Clause 4 shall apply.

169 Test leads and test prob
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