IEC 61557-6:2007

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

Specifies the requirements for measuring equipment applied to the testing of the effectiveness of protective measures by regular disconnections of residual current protective devices (RCD) in TT, TN and IT systems. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a technical revision. The following changes were made with respect to the previous edition (1997): a) title and scope complemented; b) definitions complemented; c) revision of requirements; d) "tripping tests" and "non-tripping tests" subclauses complemented; e) markings complemented; f) addition of Annex A.

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

Définit les exigences applicables aux appareils de mesure destinés à tester l'efficacité des mesures de protection lors d'une coupure régulière des disjoncteurs à courant différentiel résiduel (DCR) dans les réseaux TT, TN et IT. Cette deuxième édition annule et remplace la première édition publiée en 1997. Elle constitue une révision technique. Les principales modifications apportées par cette nouvelle édition sont les suivantes: a) le titre et le domaine d'application ont été complétés; b) les définitions ont été complétées; c) révision des exigences; d) les paragraphes relatives aux essais de déclenchement et de non-déclenchement ont été complétées; e) les marquages ont été complétés; f) ajout de l'Annexe A.

General Information

• Status: Published
• Publication Date: 15-Jul-2007
• 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: TC 85 - Measuring equipment for electrical and electromagnetic quantities
• Drafting Committee: WG 8 - TC 85/WG 8
• Current Stage: DELPUB - Deleted Publication
• Start Date: 30-Jun-2017
• Completion Date: 26-Jul-2019

Relations

• Revises: IEC 61557-6:1997 - Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 6: Residual current devices (RCD) in TT and TN systems
• Effective Date: 05-Sep-2023
• Revised: IEC 61557-6:2019 - 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 6: Effectiveness of residual current devices (RCD) in TT, TN and IT systems
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
CEI
61557-6
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-07
Electrical safety in low voltage distribution
systems up to 1000 V a.c. and 1500 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 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
Reference number
Numéro de référence
IEC/CEI 61557-6:2007
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INTERNATIONAL IEC
STANDARD
CEI
61557-6
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-07
Electrical safety in low voltage distribution
systems up to 1000 V a.c. and 1500 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 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
PRICE CODE
M
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 61557-6 © IEC:2007
CONTENTS
FOREWORD.3

1 Scope.5

2 Normative references.5

3 Terms and definitions .5

4 Requirements .6

5 Marking and operating instructions.9

5.1 Marking .9
5.2 Operating instructions.9
6 Tests .9

Annex A (normative) Measuring equipment for residual current protective devices
(RCDs) of type B.11

Bibliography .13

Table 1 – Calculation of operating uncertainty .

61557-6 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION

SYSTEMS UP TO 1000 V a.c. AND 1500 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

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,
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agreement between the two organizations.
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
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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 second edition cancels and replaces the first edition published in 1997. This edition
constitutes a technical revision.
The following changes were made with respect to the previous edition (1997):
a) title and scope complemented;
b) definitions complemented;
c) revision of requirements;
d) “tripping tests” and “non-tripping tests” subclauses complemented;

– 4 – 61557-6 © IEC:2007
e) markings complemented;
f) addition of Annex A.
The text of this standard is based on the following documents:

Enquiry draft Report on voting

85/279A/CDV 85/298/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part of IEC 61557 shall be used in conjunction with Part 1.
A list of all parts of the IEC 61557 series, published under the general 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, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
61557-6 © IEC:2007 – 5 –
ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION

SYSTEMS UP TO 1000 V a.c. AND 1500 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

1 Scope
This part of IEC 61557 specifies the requirements for measuring equipment applied to the
testing of the effectiveness of protective measures by regular disconnections of residual
current protective devices (RCD) in TT, TN and IT systems.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC/TR 60755, General requirements for residual current operated protective devices
IEC 60947-2, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers
IEC 61008 (all parts), Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses (RCCBs)
IEC 61009 (all parts), Residual current operated circuit-breakers with integral overcurrent
protection for household and similar uses (RCBOs)
IEC 61010-1:2001, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 1: General requirements
IEC 61557-1:2007, 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 1:
General requirements
3 Terms and definitions
For the purposes of this document, the definitions given in IEC 61557-1 and the following
definitions apply.
3.1
fault current
IΔ
current flowing to earth due to an insulation fault

– 6 – 61557-6 © IEC:2007
3.2
rated residual operating current
I
ΔN
fault current for which the residual current protective device is designed

3.3
residual operating current
I
a
fault current at which the residual current protective device is activated

3.4
test resistance
R
p
resistance by means of which a fault current for test purposes is prod
...