IEC 61557-9:2009

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 9: Equipment for insulation fault location in IT systems

IEC 61557-9:2009 specifies the requirements for insulation fault location systems which localize insulation faults in any part of the system in unearthed IT a.c. systems and unearthed IT a.c. systems with galvanically connected d.c. circuits having nominal voltages up to 1 000 V a.c., as well as in unearthed IT d.c. systems with voltages up to 1 500 V d.c., independent of the measuring principle. This second edition cancels and replaces the first edition published in 1999. It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- scope, normative references and terms and definitions complemented;
- revision of requirements, marking and operating instructions and Clause 6;
- revision of Table 1;
- addition of Annexes A, B and C.

Sécurité électrique dans les réseaux de distribution basse tension de 1000 v c.a. et 1500 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

La CEI 61557-9:2009 définit les exigences particulières applicables aux dispositifs de localisation de défauts d'isolement qui, indépendamment du principe de mesure, peuvent localiser les défauts d'isolement des parties de réseaux IT c.a. non mis à la terre et des réseaux IT c.a. non mis à la terre comprenant des circuits à courant continu reliés galvaniquement dont les tensions nominales sont égales ou inférieures à 1 000 V c.a., ainsi que dans des réseaux IT c.c. non mis à la terre dont les tensions nominales sont égales ou inférieures à 1 500 V c.c. Cette deuxième édition annule et remplace la première édition parue en 1999. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- le domaine d'application, les références normatives et les termes et définitions ont été complétés;
- les exigences, le marquage et les instructions de fonctionnement et l'Article 6 ont été révisés;
- le Tableau 1 a été révisé;
- les Annexes A, B et C ont été ajoutées.

General Information

• Status: Published
• Publication Date: 11-Jan-2009
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: TC 85 - Measuring equipment for electrical and electromagnetic quantities
• Drafting Committee: WG 8 - TC 85/WG 8
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 11-Dec-2014

Relations

• Revised: IEC 61557-9:2014 - 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
• Effective Date: 05-Sep-2023
• Revises: IEC 61557-9:1999 - 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61557-9 ®
Edition 2.0 2009-01
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

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IEC 61557-9 ®
Edition 2.0 2009-01
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
S
CODE PRIX
ICS 25.040.40 ISBN 978-2-88910-536-6
– 2 – 61557-9 © IEC:2009
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .7
4 Requirements .8
4.1 Equipment for insulation fault location .8
4.2 Response sensitivity.8
4.3 Warning device .8
4.4 Locating current I .8
L
4.5 Locating voltage U .9
L
4.6 Indication of the insulation value .9
4.7 PE connection .9
4.8 Clearances and creepage distances .9
4.9 Electromagnetic compatibility (EMC) .9
4.10 Additional requirements.9
5 Marking and operating instructions .10
5.1 Marking .10
5.2 Operating instructions .11
6 Tests .11
6.1 Type test .12
6.1.1 Response sensitivity of the insulation fault location system .12
6.1.2 Locating current I .12
L
6.1.3 Locating voltage U .13
L
6.1.4 Warning device.13
6.1.5 Equipment for indication of the insulation value .13
6.1.6 Locating current injector .13
6.1.7 Dielectric test .13
6.1.8 Electromagnetic compatibility (EMC) .13
6.1.9 Loss of locating current sensor connection .13
6.1.10 Additional requirements .13
6.1.11 Marking and operating instructions .13
6.1.12 Record of the type test .13
6.2 Routine tests .13
6.2.1 General .13
6.2.2 Response sensitivity.13
6.2.3 Warning device.14
6.2.4 Self-test function .14
6.2.5 Dielectric test .14
6.2.6 Marking and operating instructions .14
Annex A (normative) Equipment for insulation fault location in medical locations .15
Annex B (normative) Portable equipment for insulation fault location .18
Annex C (informative) Example of an insulation fault location system and explanation of
upstream / downstream leakage capacitances .20
Bibliography.23

Figure C.1 – Example of an insulation fault location system.21

61557-9 © IEC:2009 – 3 –
Figure C.2 – Explanation of upstream/downstream leakage capacitance.22

Table 1 – Requirements for Insulation Fault Location Systems (IFL) .10
Table A.1 – Additional requirements applicable to equipment for insulation fault location
in medical locations .17
Table A.2 – Emission test for equipment for insulation fault location in medical locations.17

– 4 – 61557-9 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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

FOREWORD
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