EN 61557-9:2015

SLOVENSKI STANDARD
01-junij-2015
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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 9:
Equipment for insulation fault location in IT systems (IEC 61557-9:2014)
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 9:
Einrichtungen zur Isolationsfehlersuche in IT-Systemen (IEC 61557-9:2014)
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 9: Dispositifs de localisation de défauts d'isolement pour réseaux IT
(IEC 61557-9:2014)
Ta slovenski standard je istoveten z: EN 61557-9:2015
ICS:
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29.080.01 (OHNWULþQDL]RODFLMDQD Electrical insulation in
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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 61557-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2015
ICS 25.040.40 Supersedes EN 61557-9:2009
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 9: Equipment for
insulation fault location in IT systems
(IEC 61557-9:2014)
Sécurité électrique dans les réseaux de distribution basse Elektrische Sicherheit in Niederspannungsnetzen bis AC 1
tension de 1 000 V c.a. et 1 500 V c.c - Dispositifs de 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder
contrôle, de mesure ou de surveillance de mesures de Überwachen von Schutzmaßnahmen - Teil 9: Einrichtungen
protection - Partie 9: Dispositifs de localisation de défauts zur Isolationsfehlersuche in IT-Systemen
d'isolement pour réseaux IT (IEC 61557-9:2014)
(IEC 61557-9:2014)
This European Standard was approved by CENELEC on 2015-01-15. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61557-9:2015 E
Foreword
The text of document 85/486/FDIS, future edition 3 of IEC 61557-9, 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 61557-9:2015.

The following dates are fixed:
(dop) 2015-10-15
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2018-01-15
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61557-9:2009

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.

This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for
Use within Certain Voltage Limits (LVD).

Endorsement notice
The text of the International Standard IEC 61557-9:2014 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 60364-4-41:2005 NOTE Harmonized as HD 60364-4-41:2007.
IEC 60664-1 NOTE Harmonized as EN 60664-1.
IEC 60664-3 NOTE Harmonized as EN 60664-3.
IEC 60947-5-1:2003 NOTE Harmonized as EN 60947-5-1:2004.
IEC 60947-5-4:2002 NOTE Harmonized as EN 60947-5-4:2003.
IEC 61140 NOTE Harmonized as EN 61140.
IEC 61810-2:2011 NOTE Harmonized as EN 61810-2:2011.

- 3 - EN 61557-9:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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 60068-2-1 -  Environmental testing -- Part 2-1: Tests - Test EN 60068-2-1 -
A: Cold
IEC 60068-2-2 -  Environmental testing -- Part 2-2: Tests - Test EN 60068-2-2 -
B: Dry heat
IEC 60068-2-6 -  Environmental testing -- Part 2-6: Tests - Test EN 60068-2-6 -
Fc: Vibration (sinusoidal)
IEC 60068-2-27 -  Environmental testing -- Part 2-27: Tests - EN 60068-2-27 -
Test Ea and guidance: Shock
IEC 60364-7-710 2002 Electrical installations of buildings -- Part 7- HD 60364-7-710 2012
(mod) 710: Requirements for special installations or
locations - Medical locations
+AC 2013
IEC 60529 -  Degrees of protection provided by enclosures - -
(IP Code)
IEC 60664 series Insulation coordination for equipment within EN 60664 series
low-voltage systems
IEC 60721-3-1 -  Classification of environmental conditions -- EN 60721-3-1 -
Part 3: Classification of groups of
environmental parameters and their severities
-- Section 1: Storage
IEC 60721-3-2 -  Classification of environmental conditions -- EN 60721-3-2 -
Part 3: Classification of groups of
environmental parameters and their severities
-- Section 2: Transportation
IEC 60721-3-3 -  Classification of environmental conditions -- EN 60721-3-3 -
Part 3: Classification of groups of
environmental parameters and their severities
-- Section 3: Stationary use at
weatherprotected locations
IEC 61010-1 2010 Safety requirements for electrical equipment EN 61010-1 2010
for measurement, control and laboratory use -
- Part 1: General requirements
IEC 61010-2-030 -  Safety requirements for electrical equipment EN 61010-2-030 -
for measurement, control and laboratory use -
- Part 2-030: Particular requirements for
testing and measuring circuits
IEC 61010-2-032 -  Safety requirements for electrical equipment EN 61010-2-032 -
for measurement, control, and laboratory use
-- Part 2-032: Particular requirements for
hand-held and hand-manipulated current
sensors for electrical test and measurement

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 61326-2-2 -  Electrical equipment for measurement, control EN 61326-2-2 -
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
IEC 61326-2-4 -  Electrical equipment for measurement, control EN 61326-2-4 -
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
IEC 61557-1 2007 Electrical safety in low voltage distribution EN 61557-1 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 1:
General requirements
IEC 61557-8 -  Electrical safety in low voltage distribution EN 61557-8 -
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
CISPR 11 -  Industrial, scientific and medical equipment - EN 55011 -
Radio-frequency disturbance characteristics -
Limits and methods of measurement

IEC 61557-9 ®
Edition 3.0 2014-12
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 9: Equipment for insulation fault location in 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 9: Dispositifs de localisation de défauts d'isolement pour réseaux IT

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 25.040.40 ISBN 978-2-8322-1976-8

– 2 – IEC 61557-9:2014 © IEC 2014
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 8
3.1 Terms, definitions, symbols and units . 8
3.2 Abbreviations . 10
4 Requirements . 10
4.1 General requirements . 10
4.2 Mandatory functions provided by an IFLS . 11
4.2.1 Location warning . 11
4.2.2 Local location warning (LLW) . 11
4.2.3 Remote location warning (RLW). 11
4.3 Optional functions provided by IFLS . 12
4.3.1 Indication of the insulation value . 12
4.3.2 Performance of the IFLS in case of the interruption of the connection to
the locating current sensor (LCS) . 12
4.4 Performance requirements . 12
4.4.1 Response sensitivity . 12
4.4.2 Locating current I . 12
L
4.4.3 Locating voltage U . 12
L
4.5 Electromagnetic compatibility (EMC) . 12
4.6 Safety requirements . 12
4.6.1 General . 12
4.6.2 Clearances and creepage distances . 12
4.6.3 Protection class and earth connection of the IFLS . 13
4.7 Climatic environmental conditions . 13
4.8 Mechanical requirements .
...