EN 61557-1:2007

SLOVENSKI STANDARD
01-september-2007
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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
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen -- Teil 1:
Allgemeine Anforderungen
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 1: Exigences générales
Ta slovenski standard je istoveten z: EN 61557-1:2007
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61557-1
NORME EUROPÉENNE
March 2007
EUROPÄISCHE NORM
ICS 17.220.20; 29.080.01; 29.240.01 Supersedes EN 61557-1:1997

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 1: General requirements
(IEC 61557-1:2007)
Sécurité électrique dans les réseaux  Elektrische Sicherheit
de distribution basse tension in Niederspannungsnetzen
de 1 000 V c.a. et 1 500 V c.c. - bis AC 1 000 V und DC 1 500 V -
Dispositifs de contrôle, de mesure Geräte zum Prüfen,
ou de surveillance de mesures Messen oder Überwachen
de protection - von Schutzmaßnahmen -
Partie 1: Exigences générales Teil 1: Allgemeine Anforderungen
(CEI 61557-1:2007) (IEC 61557-1:2007)

This European Standard was approved by CENELEC on 2007-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61557-1:2007 E
Foreword
The text of document 85/290/FDIS, future edition 2 of IEC 61557-1, prepared by IEC TC 85, Measuring
equipment for electrical and electromagnetic quantities, was submitted to the IEC-CENELEC parallel vote
and was approved by CENELEC as EN 61557-1 on 2007-03-01.
This European Standard supersedes EN 61557-1:1997.
The following changes were made with respect to EN 61557-1:1997:
– revision of the definitions;
– addition of influence quantities E and E ;
9 10
– the subclause on Electromagnetic compatibility was complemented;
– inclusion of performance monitoring devices in the introduction;
– addition of new requirements for operating instructions.
This Part 1 specifies the general requirements. Parts 2 to 8 of EN 61557, which are to be used in
conjunction with this Part 1, comprise specific specifications for individual measuring equipment.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61557-1:2007 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 NOTE  Harmonized as EN 60359:2002 (not modified).
IEC 60364-6 NOTE  Harmonized as HD 60364-6:2007 (modified).
IEC 61326-1 NOTE  Harmonized as EN 61326-1:2006 (not modified).
__________
- 3 - EN 61557-1:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1)
IEC 60038 (mod) 1983 IEC standard voltages HD 472 S1 1989
- - + corr. February 2002
- - A1 1995
A1 1994
A2 1997
IEC 60364-6 (mod) 2006 Low voltage electrical installations - HD 60364-6 2007
Part 6: Verification
2) 3)
IEC 60664-1 - Insulation coordination for equipment within EN 60664-1 2003
low-voltage systems -
Part 1: Principles, requirements and tests

IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
(IP Code) + corr. May 1993
A1 1999 A1 2000
IEC 61010-1 2001 Safety requirements for electrical equipment EN 61010-1 2001
for measurement, control, and laboratory + corr. June 2002
use -
Part 1: General requirements
4)
IEC 61010-2-030 200X Safety requirements for electrical equipment - -
for measurement, control and laboratory use -
Part 2-030: Particular requirements for testing
and measuring circuits
IEC 61326-2-2 2005 Electrical equipment for measurement, EN 61326-2-2 2006
control and laboratory use - EMC
requirements -
Part 2-2: Particular requirements - Test
configurations, operational conditions and
performance criteria for portable test,
measuring and monitoring equipment used in
low-voltage distribution systems

1)
The title of HD 472 S1 is: Nominal voltages for low voltage public electricity supply systems.
2)
Undated reference.
3)
Valid edition at date of issue.
4)
To be published.
Publication Year Title EN/HD Year
IEC 61326-2-4 2006 Electrical equipment for measurement, EN 61326-2-4 2006
control and laboratory use - EMC
requirements -
Part 2-4: Particular requirements - Test
configurations, operational conditions and
performance criteria for insulation monitoring
devices according to IEC 61557-8 and for
equipment for insulation fault location
according to IEC 61557-9
2) 3)
IEC 61557-2 - Electrical safety in low voltage distribution EN 61557-2 2007
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 2: Insulation resistance
2) 3)
IEC 61557-3 - Electrical safety in low voltage distribution EN 61557-3 2007
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 3: Loop impedance
2) 3)
IEC 61557-4 - Electrical safety in low voltage distribution EN 61557-4 2007
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 4: Resistance of earth connection and
equipotential bonding
2) 3)
IEC 61557-5 - Electrical safety in low voltage distribution EN 61557-5 2007
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
4) 5)
IEC 61557-6 - Electrical safety in low voltage distribution EN 61557-6 200X
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

2) 3)
IEC 61557-7 - Electrical safety in low voltage distribution EN 61557-7 2007
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 7: Phase sequence
2) 5)
IEC 61557-8 - Electrical safety in low voltage distribution EN 61557-8 200X
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 8: Insulation monitoring devices for IT
systems
5)
To be ratified.
- 5 - EN 61557-1:2007
Publication Year Title EN/HD Year
2) 3)
IEC 61557-9 - Electrical safety in low voltage distribution EN 61557-9 1999
systems up to 1 kV a.c. and 1,5 kV d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 9: Equipment for insulation fault location
in IT systems
2) 3)
IEC 61557-10 - Electrical safety in low voltage distribution EN 61557-10 2001
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 10: Combined measuring equipment for
testing, measuring or monitoring of protective
measures
NORME CEI
INTERNATIONALE
IEC
61557-1
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2007-01
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 1: Exigences générales
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
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61557-1 © IEC:2007 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9

1 Scope.11
2 Normative references.11
3 Terms and definitions .13
4 Requirements .21
4.1 Operating uncertainty (B), percentage operating uncertainty (B [%]) .23
4.2 Rated operating conditions .25
4.3 Battery check facility.25
4.4 Terminals .25
4.5 Class of protection.25
4.6 Class of pollution .25
4.7 Overvoltage category.25
4.8 Measuring category .25
4.9 Electromagnetic compatibility.27
4.10 Vibration test .27
5 Marking and operating instructions.27
5.1 Marking .27
5.2 Operating instructions.29
6 Tests .29
6.1 Influence of position.
...