FprEN IEC 61557-9:2023

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 9: Equipment for insulation fault location in IT systems

IEC 61557-9:2023 specifies the requirements for the insulation fault location system (IFLS) that localizes insulation faults in any part of the system in unearthed IT AC systems and unearthed IT AC systems with galvanically connected DC circuits having nominal voltages up to 1 000 V AC, as well as in unearthed IT DC systems with voltages up to 1 500 V DC, independent of the measuring principle. IEC 61557-9:2023 cancels and replaces the third edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) new terms and definitions on maximum admissible locating AC and DC currents and voltages; b) the requirements on locating current and locating voltage have been revised; c) performance requirements have been added; d) the test requirements for locating current and locating voltage have been revised; e) the structure of this document has been adapted to that of IEC 61557-1:2019; f) the limit values under Clause A.2 were adapted to fit the changed test methods in 6.2.3.

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

Sécurité électrique dans les réseaux de distribution basse tension au plus égale à 1 000 V en C.A et 1 500 V en 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

L'IEC 61557-9:2023 spécifie les exigences applicables aux dispositifs de localisation de défauts d’isolement (DLD) qui, indépendamment du principe de mesure, peuvent localiser les défauts d’isolement des parties de réseaux IT à courant alternatif non mis à la terre et des réseaux IT à courant alternatif non mis à la terre comprenant des circuits à courant continu reliés galvaniquement dont les tensions nominales sont au plus égales à 1 000 V en courant alternatif, et de réseaux IT à courant continu non mis à la terre dont les tensions sont au plus égales à 1 500 V en courant continu. L'IEC 61557-9:2023 annule et remplace la troisième édition parue en 2014. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) ajout de nouveaux termes et de nouvelles définitions sur les courants et tensions, alternatifs et continus, de localisation maximaux admissibles; b) révision des exigences relatives au courant de localisation et à la tension de localisation; c) ajout d’exigences de performance; d) révision des exigences d’essai pour le courant de localisation et la tension de localisation; e) modification de la structure du présent document pour s’adapter à l’IEC 61557-1:2019; f) modification des valeurs limites de l’Article A.2 pour s’adapter aux méthodes d’essai modifiées en 6.2.3.

Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti do 1 000 V in enosmerne napetosti do 1 500 V - Oprema za preskušanje, merjenje ali nadzorovanje zaščitnih ukrepov - 9. del: Oprema za ugotavljanje mesta izolacijske okvare v IT-sistemih

General Information

• Status: Not Published
• Publication Date: 28-Jan-2024
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: CLC/TC 85X - Measuring equipment for electrical and electromagnetic quantities
• Drafting Committee: IEC/TC 85 - IEC_TC_85
• Current Stage: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 27-Oct-2023
• Completion Date: 27-Oct-2023
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Ref Project: oSIST prEN IEC 61557-9:2022 - 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

Relations

• Revises: EN 61557-9:2015 - 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: 23-Jan-2023
• Revises: EN 61557-9:2015/AC:2017-02 - 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: 18-May-2021
• Revises: EN 61557-9:2015/AC:2016-06 - 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: 18-May-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2022
Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti
do 1 000 kV in enosmerne napetosti do 1 500 kV - Oprema za preskušanje,
merjenje ali nadzorovanje zaščitnih ukrepov - 9. del: Oprema za ugotavljanje
mesta izolacijske okvare v IT-sistemih
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
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
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
Ta slovenski standard je istoveten z: prEN IEC 61557-9:2022
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
29.080.01 Električna izolacija na Electrical insulation in
splošno general
29.240.01 Omrežja za prenos in Power transmission and
distribucijo električne energije distribution networks in
na splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

85/829/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61557-9 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-06-03 2022-08-26
SUPERSEDES DOCUMENTS:
85/783/CD, 85/800A/CC
IEC TC 85 : MEASURING EQUIPMENT FOR ELECTRICAL AND ELECTROMAGNETIC QUANTITIES
SECRETARIAT: SECRETARY:
China Ms Guiju HAN
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

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 9: Equipment for
insulation fault location in IT systems

PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
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.

IEC CDV 61557-9 © IEC 2022 2 85/829/CDV
1 CONTENTS
2 CONTENTS . 1
3 FOREWORD . 4
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms, definitions and abbreviations . 7
7 3.1 Terms, definitions, symbols and units . 7
8 3.2 Abbreviated terms and symbols . 10
9 4 Requirements . 13
10 4.1 General requirements . 13
11 4.2 Functions provided by an IFLS . 13
12 4.2.1 Location warning . 13
13 4.2.2 Local location warning (LLW) . 13
14 4.2.3 Remote location warning (RLW). 13
15 4.3 Optional functions provided by IFLS . 14
16 4.3.1 Indication of the insulation value . 14
17 4.3.2 Performance of the IFLS in case of the interruption of the connection to
18 the locating current sensor (LCS) . 14
19 4.4 Performance requirements . 14
20 4.4.1 Response sensitivity . 14
21 4.4.2 Locating current I and locating voltage U . 14
L L
22 4.4.3 Permanently admissible nominal voltage U . 15
pa
23 4.4.4 Supply voltage U . 15
s
24 4.5 Safety requirements . 15
25 4.5.1 General . 15
26 4.5.2 Clearance and creepage distances . 15
27 4.5.3 Protection class and earth connection of the IFLS . 16
28 4.6 Electromagnetic compatibility . 16
29 4.7 Mechanical requirements . 16
30 4.7.1 General . 16
31 4.7.2 Product mechanical robustness . 16
32 4.7.3 IP protection class requirements . 16
33 4.8 Climatic environmental conditions . 16
34 5 Marking and operating instructions . 18
35 5.1 Marking . 18
36 5.2 Operating instructions . 18
37 6 Tests . 19
38 6.1 General . 19
39 6.2 Type tests . 19
40 6.2.1 General . 19
41 6.2.2 Test of response sensitivity of the IFLS . 19
42 6.2.3 Test of the locating current I and locating voltage U . 20
L L
43 6.2.4 Test of the location warning . 23
44 6.2.5 Test of the indication of the insulation value . 23
45 6.2.6 Verification of insulation coordination . 23
46 6.2.7 Test of the electromagnetic compatibility (EMC) . 23
47 6.2.8 Test of the loss of LCS connection . 23
48 6.2.9 Test of the protection class and the earth connection of the IFLS . 23
49 6.2.10 Inspection of the marking and operating instructions . 23

IEC CDV 61557-9 © IEC 2022 3 85/829/CDV
50 6.2.11 Mechanical test . 23
51 6.2.12 Record of the type test . 23
52 6.3 Routine tests. 23
53 6.3.1 General . 23
54 6.3.2 Test of the response sensitivity. 23
55 6.3.3 Test of the location warning . 24
56 6.3.4 Test of the self-test function . 24
57 6.3.5 Voltage test . 24
58 6.3.6 Compliance with the tests of Clause 6 . 24
59 7 Overview of requirements and tests for IFLS . 24
60 Annex A (normative) Insulation fault location system in medical locations (MED-IFLS) . 25
61 A.1 General . 25
62 A.2 Requirements . 25
63 A.2.1 General . 25
64 A.2.2 Performance requirements . 25
65 A.2.3 Electromagnetic compatibility . 25
66 A.3 Additional tests . 26
67 A.3.1 General . 26
68 A.3.2 Test of the performance requirements . 26
69 A.3.3 Test of the response time . 26
70 A.3.4 Test of the electromagnetic compatibility (EMC) . 26
71 Annex B (normative) Portable equipment for insulation fault location . 28
72 B.1 General . 28
73 B.2 Additional requirements . 28
74 B.2.1 General . 28
75 B.2.2 Performance requirements . 28
76 B.3 Marking and operating instructions . 28
77 B.4 Additional tests . 28
78 Annex C (informative) Example of an IFLS and explanation of upstream and
79 downstream system leakage capacitances . 29
80 C.1 Examples for the functions of an IFLS . 29
81 C.2 Upstream and downstream system leakage capacitance . 31
82 Bibliography . 32
84 Figure 1 – Test configuration: I driven directly from the system to be monitored . 21
L
85 Figure 2 – Test configuration: Active locating source . 22
86 Figure 3 – Test configuration for current testing: Active locating source is used with a
87 locating voltage above 50 V AC RMS and 70 V peak or 120 V DC . 22

88 Figure C.1 – Example of an IFLS . 30
89 Figure C.2 – Explanation of upstream and downstream system leakage capacitance . 31
91 Table 1 – Abbreviations and symbols . 10
92 Table 2 – Product mechanical requirements . 17
93 Table 3 – Minimum IP requirements for IFLS . 18
94 Table 4 – Reference conditions for tests in operation . 19
95 Table 5 – Reference conditions for storage tests . 19
96 Table 6 – Requirements and tests on IFLSs .
...